Merge branch 'dev' - v2.5

Changes:

Functionality:
- Middle mouse - drag the canvas
- Straight line painting (hold Shift / Ctrl)
- A button to Copy from Test font dialog to then paste into another frame

Bugs fixed:
- Nothing selected after removing a symbol. Potential error throw on "Apply"

McBitFont/CanvasHistory.cs

@@ -1,85 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
-using System.Text;
-using System.Threading.Tasks;
-
-
-namespace McBitFont {
-    internal class CanvasHistory {
-        private List<bool[,]> stack;
-        public int Depth { get; set; }
-        public int Index { get; set; }
-        public int Count {
-            get { return stack.Count - 1; }
-        }
-        public int Redos {
-            get {
-                var r = Count - Index - 1;
-
-                return r < 0 ? 0 : r;
-            }
-        }
-        public int Undos {
-            get {
-                return Index + 1;
-            }
-        }
-
-        
-        public CanvasHistory(int depth = 50) {
-            Depth = depth;
-            Index = -1;
-            stack = [];
-        }
-
-        public void Clear() {
-            stack.Clear();
-            Index = -1;
-        }
-
-        public void AddPre(MainForm.FrameMiniature f, bool useIndex = true) {
-            if (Count < 0) stack.Add(new bool[f.width, f.height]);
-            if (Index < Count - 1) {
-                stack.RemoveRange(Index + 1, Count - Index - 1);
-            }
-            bool[,] d = new bool[f.width, f.height];
-            Array.Copy(f.data, d, f.data.Length);
-            stack.Insert(Count, d);
-            if (useIndex) {
-                if (Count > Depth) stack.RemoveAt(0);
-                else Index++;
-            }
-        }
-
-        public void AddPost(MainForm.FrameMiniature f) {
-            var d = stack.ElementAt(Count);
-            Array.Copy(f.data, d, f.data.Length);
-        }
-
-        public void ApplyAdded() {
-            while (Count > Depth) stack.RemoveAt(0);
-            Index = Count - 1;
-        }
-
-        public void Remove(bool useIndex = true) {
-            stack.RemoveAt(Count - 1);
-            if (useIndex) Index--;
-        }
-
-        public void Undo(MainForm.FrameMiniature f) {
-            if (Index < 0) return;
-            var d = stack.ElementAt(Index);
-            Array.Copy(d, f.data, d.Length);
-            Index--;
-        }
-
-        public void Redo(MainForm.FrameMiniature f) {
-            if (Index >= Count - 1) return;
-            Index++;
-            var d = stack.ElementAt(Index + 1);
-            Array.Copy(d, f.data, d.Length);
-        }
-    }
-}

McBitFont/ChangeHistory.cs

@@ -0,0 +1,304 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using static McBitFont.MainForm;
+
+namespace McBitFont {
+    internal class ChangeHistory {
+        private MainForm mainForm;
+        private List<ChangeEvent> timeline = [];
+        private List<FrameMiniature> canvasChanges = [];
+        private List<List<FrameMiniature>> fontChanges = [];
+        private List<int> selectionChanges = [];
+        private int canvasIndex = 0;
+        private int fontIndex = 0;
+        private int selectionIndex = 0;
+        public int Depth { get; set; }
+        public int Index { get; set; } = -1;
+        public int Count {
+            get { return timeline.Count; }
+        }
+        public int Undos {
+            get { return Index < 0 ? 0 : Index + 1; }
+        }
+        public int Redos {
+            get { return Index < 0 ? Count : Count - Index - 1; }
+        }
+        public bool Doing { get; set; } = false;
+
+        // Constructor
+        public ChangeHistory(MainForm form, int depth = 100) {
+            timeline = [];
+            canvasChanges = [];
+            fontChanges = [];
+            selectionChanges = [];
+            mainForm = form;
+            Depth = depth;
+            ResetIndices();
+            Add();
+            Doing = false;
+        }
+
+
+
+        private void ResetIndices() {
+            Index = -1;
+            canvasIndex = 0;
+            fontIndex = 0;
+            selectionIndex = 0;
+        }
+
+        public enum ChangeType {
+            None   = 0,
+            Canvas = 1,     // Changes made to canvas
+            Font   = 2,     // Symbol width has been changed
+            Selection  = 3  // Selected another frame
+        }
+
+        public class ChangeEvent(ChangeType type, FrameMiniature? canvas = null) {
+            public ChangeType Type { get; set; } = type;
+            public FrameMiniature? Canvas { get; set; } = canvas;
+        }
+
+        public static FrameMiniature CopyFrameSimple(FrameMiniature f) {
+            FrameMiniature newf = new(f.code, f.width, f.height);
+            Array.Copy(f.data, newf.data, f.data.Length);
+            return newf;
+        }
+
+        public void Clear() {
+            timeline.Clear();
+            canvasChanges.Clear();
+            fontChanges.Clear();
+            selectionChanges.Clear();
+            ResetIndices();
+            Add();
+        }
+
+        // Remove from a proper list by change type
+        private bool RemoveByType(ChangeEvent ce, bool first = true) {
+            switch (ce.Type) {
+                case ChangeType.Canvas:
+                    if (canvasChanges.Count <= 1) return false;
+                    if ((first && canvasIndex > 0) || (!first && canvasIndex == canvasChanges.Count - 1)) canvasIndex--;
+                    canvasChanges.RemoveAt(first ? 0 : canvasChanges.Count - 1);
+                    break;
+                case ChangeType.Font:
+                    if (fontChanges.Count <= 1) return false;
+                    if ((first && fontIndex > 0) || (!first && fontIndex == fontChanges.Count - 1)) fontIndex--;
+                    if (ce.Canvas != null) {
+                        if ((first && canvasIndex > 0) || (!first && canvasIndex == canvasChanges.Count - 1)) canvasIndex--;
+                        canvasChanges.Remove((FrameMiniature)ce.Canvas);
+                    }
+                    fontChanges.RemoveAt(first ? 0 : fontChanges.Count - 1);
+                    break;
+                case ChangeType.Selection:
+                    if (selectionChanges.Count <= 1) return false;
+                    if ((first && selectionIndex > 0) || (!first && selectionIndex == selectionChanges.Count - 1)) selectionIndex--;
+                    if (ce.Canvas != null) {
+                        if ((first && canvasIndex > 0) || (!first && canvasIndex == canvasChanges.Count - 1)) canvasIndex--;
+                        canvasChanges.Remove((FrameMiniature)ce.Canvas);
+                    }
+                    selectionChanges.RemoveAt(first ? 0 : selectionChanges.Count - 1);
+                    break;
+                default:
+                    return false;
+            }
+            if ((first && Index > 0) || (!first && Index == Count - 1) || Count == 1) Index--;
+            timeline.RemoveAt(first ? 0 : Count - 1);
+            
+
+            return true;
+        }
+
+        // Remove oldest event
+        private bool RemoveOldest() {
+            if (Count == 0) return false;
+            ChangeEvent ce = timeline.First();
+            RemoveByType(ce);
+
+            return true;
+        }
+
+        // Remove last event
+        public bool RemoveLast() {
+            if (Count == 0) return false;
+            var ce = timeline.Last();
+            RemoveByType(ce, false);
+
+            return true;
+        }
+
+        // Remove history tail
+        private void TruncateTail() {
+            // Check if the Index does not point to the last event
+            //while (Index < Count - 1) Remove
+            if (Index >= -1 && Index < Count - 1) {
+                timeline.RemoveRange(       Index + 1,         Count                 - Index - 1);
+                canvasChanges.RemoveRange(  canvasIndex + 1,   canvasChanges.Count   - canvasIndex - 1);
+                fontChanges.RemoveRange(    fontIndex + 1,     fontChanges.Count     - fontIndex - 1);
+                selectionChanges.RemoveRange(selectionIndex + 1, selectionChanges.Count - selectionIndex - 1);
+            }
+        }
+
+        // Add first states to all lists
+        private void Add() {
+            Add(mainForm.f, false);
+            Add(mainForm.frames, false);
+            var fff = mainForm.f;   // Marshal-by-reference warning workaround
+            int ccс = fff.code;     //
+            Add(ccс, false);
+        }
+
+        // Add canvas change
+        public FrameMiniature? Add(FrameMiniature f, bool useIndex = true) {
+            if (Doing) return null ;
+            TruncateTail();
+
+            if (Count >= Depth) RemoveOldest();
+            canvasChanges.Add(CopyFrameSimple(f));
+            if (useIndex) {
+                timeline.Add(new ChangeEvent(ChangeType.Canvas));
+                Index++;
+                canvasIndex++;
+            }
+            return canvasChanges.Last();
+        }
+
+        // Add Font change
+        public void Add(List<FrameMiniature> ff, bool useIndex = true) {
+            if (Doing) return;
+            TruncateTail();
+
+            var l = new List<FrameMiniature>();
+            foreach (var f in ff) {
+                l.Add(CopyFrameSimple(f));
+            }
+
+            if (Count >= Depth) RemoveOldest();
+            fontChanges.Add(l);
+            if (useIndex) {
+                var canv = Add(mainForm.f, false);
+                canvasIndex++;
+                timeline.Add(new ChangeEvent(ChangeType.Font, canv));
+                Index++;
+                fontIndex++;
+            }
+        }
+
+        // Add Frame selection change
+        public void Add(int code, bool useIndex = true) {
+            if (Doing) return;
+            TruncateTail();
+
+            if (Count >= Depth) RemoveOldest();
+            selectionChanges.Add(code);
+            if (useIndex) {
+                var canv = Add(mainForm.f, false);
+                canvasIndex++;
+                timeline.Add(new ChangeEvent(ChangeType.Selection, canv));
+                Index++;
+                selectionIndex++;
+            }
+
+        }
+
+        private void Do(bool undo = true) {
+            if (!undo && Index >= Count - 1) return;
+            Doing = true;
+            var ce = timeline.ElementAt(Index + (undo ? 0 : 1));
+            int dIndex = undo ? -1 : 1;
+            FrameMiniature fff;
+            switch (ce.Type) {
+                case ChangeType.Canvas:
+                    canvasIndex += dIndex;
+                    mainForm.f = CopyFrameSimple(canvasChanges[canvasIndex]);
+                    mainForm.SetModified();
+                    mainForm.nudX.ValueChanged -= mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged -= mainForm.nudY_ValueChanged;
+                    mainForm.nudY.Value = mainForm.dotHeight = canvasChanges[canvasIndex].height;
+                    mainForm.nudX.Value = mainForm.dotWidth = canvasChanges[canvasIndex].width;
+                    mainForm.SetNewWH();
+                    mainForm.nudX.ValueChanged += mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged += mainForm.nudY_ValueChanged;
+                    break;
+                case ChangeType.Font:
+                    Cursor.Current = Cursors.WaitCursor;
+                    string selItem = "";
+                    int selCode = 0;
+                    if (mainForm.miniList.SelectedItems.Count > 0) {
+                        selItem = mainForm.miniList.SelectedItems[0].Name;
+                        selCode = Convert.ToInt32(selItem);
+                    }
+                    fontIndex += dIndex;
+                    canvasIndex += dIndex;
+                    mainForm.frames.Clear();
+                    mainForm.miniList.Clear();
+                    mainForm.ilMiniatures.Images.Clear();
+                    foreach (var f in fontChanges[fontIndex]) {
+                        mainForm.frames.Add(CopyFrameSimple(f));
+                    }
+                    mainForm.FillFrameLists();
+                    
+                    if (selItem != "") {
+                        var selection = mainForm.miniList.Items.Find(selItem, false);
+                        if (selection.Length > 0) selection[0].Selected = true;
+                        fff = mainForm.frames.Find(x => x.code == selCode);
+                    } else {
+                        mainForm.miniList.Items[0].Selected = true;
+                        fff = mainForm.frames[0];
+                    }
+                    mainForm.f = mainForm.CopyFrame(fff);
+                    mainForm.nudX.ValueChanged -= mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged -= mainForm.nudY_ValueChanged;
+                    mainForm.nudY.Value = mainForm.dotHeight = fff.height;
+                    mainForm.nudX.Value = mainForm.dotWidth = fff.width;
+                    mainForm.SetNewWH();
+                    mainForm.nudX.ValueChanged += mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged += mainForm.nudY_ValueChanged;
+                    
+                    Cursor.Current = Cursors.Default;
+                    break;
+                case ChangeType.Selection:
+                    selectionIndex += dIndex;
+                    canvasIndex += dIndex;
+                    var s = selectionChanges[selectionIndex].ToString().PadLeft(3, '0');
+                    var sel = mainForm.miniList.Items.Find(s, false);
+                    if (sel.Length > 0) sel[0].Selected = true;
+                    fff = mainForm.frames.Find(x => x.code == selectionChanges[selectionIndex]);
+                    mainForm.f = CopyFrameSimple(fff);
+                    mainForm.nudX.ValueChanged -= mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged -= mainForm.nudY_ValueChanged;
+                    mainForm.nudY.Value = mainForm.dotHeight = fff.height;
+                    mainForm.nudX.Value = mainForm.dotWidth = fff.width;
+                    mainForm.SetNewWH();
+                    mainForm.nudX.ValueChanged += mainForm.nudX_ValueChanged;
+                    mainForm.nudY.ValueChanged += mainForm.nudY_ValueChanged;
+                    break;
+                default:
+                    break;
+            }
+            Index += dIndex;
+            Doing = false;
+           
+        }
+
+        // Undo last change
+        public bool Undo() {
+            if (Undos < 1) return false;
+            Do();
+
+            return true;
+        }
+
+        // Redo last ondone change
+        public bool Redo() {
+            if (Redos < 1) return false;
+            Do(false);
+
+            return true;
+        }
+
+    }
+}

McBitFont/FontTester.Designer.cs

@@ -34,6 +34,7 @@
             lblZoom = new System.Windows.Forms.Label();
             cbZoom = new System.Windows.Forms.ComboBox();
             toolTip1 = new System.Windows.Forms.ToolTip(components);
+            btnCopy = new System.Windows.Forms.Button();
             chkBaseline = new System.Windows.Forms.CheckBox();
             ((System.ComponentModel.ISupportInitialize)nudSpace).BeginInit();
             SuspendLayout();
@@ -98,7 +99,7 @@
             vScroll.LargeChange = 25;
             vScroll.Location = new System.Drawing.Point(251, 84);
             vScroll.Name = "vScroll";
-            vScroll.Size = new System.Drawing.Size(21, 125);
+            vScroll.Size = new System.Drawing.Size(21, 104);
             vScroll.TabIndex = 17;
             vScroll.ValueChanged += Scrolling;
             // 
@@ -140,6 +141,21 @@
             toolTip1.InitialDelay = 500;
             toolTip1.ReshowDelay = 100;
             // 
+            // btnCopy
+            // 
+            btnCopy.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
+            btnCopy.Image = Properties.Resources.Famfamfam_Silk_Page_copy_16;
+            btnCopy.ImageAlign = System.Drawing.ContentAlignment.MiddleRight;
+            btnCopy.Location = new System.Drawing.Point(110, 214);
+            btnCopy.Name = "btnCopy";
+            btnCopy.Size = new System.Drawing.Size(80, 30);
+            btnCopy.TabIndex = 21;
+            btnCopy.Text = " Copy";
+            btnCopy.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;
+            toolTip1.SetToolTip(btnCopy, "Copy BitPixels you see to Clipboard");
+            btnCopy.UseVisualStyleBackColor = true;
+            btnCopy.MouseClick += Copy_Click;
+            // 
             // chkBaseline
             // 
             chkBaseline.AutoSize = true;
@@ -155,7 +171,8 @@
             // 
             AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
             AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            ClientSize = new System.Drawing.Size(284, 221);
+            ClientSize = new System.Drawing.Size(284, 251);
+            Controls.Add(btnCopy);
             Controls.Add(chkBaseline);
             Controls.Add(cbZoom);
             Controls.Add(lblZoom);
@@ -168,13 +185,14 @@
             Controls.Add(lblSpace);
             MaximizeBox = false;
             MinimizeBox = false;
-            MinimumSize = new System.Drawing.Size(260, 260);
+            MinimumSize = new System.Drawing.Size(300, 290);
             Name = "FontTester";
             ShowIcon = false;
             ShowInTaskbar = false;
             StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
             Text = "Font Tester";
             Load += FontTester_Load;
+            Resize += Form_Resize;
             ((System.ComponentModel.ISupportInitialize)nudSpace).EndInit();
             ResumeLayout(false);
             PerformLayout();
@@ -193,5 +211,6 @@
         private System.Windows.Forms.ToolTip toolTip1;
         private System.Windows.Forms.ComboBox cbZoom;
         private System.Windows.Forms.CheckBox chkBaseline;
+        private System.Windows.Forms.Button btnCopy;
     }
 }

McBitFont/FontTester.cs

@@ -1,4 +1,5 @@
-using System;
+using MessagePack;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
@@ -24,6 +25,8 @@ namespace McBitFont {
         private int cellSize;
         private int width;
 
+        private readonly DataFormats.Format clpbFormat = DataFormats.GetFormat("McBitFontFrame");
+
         public FontTester(int codepage, int height, int baseline, List<MainForm.FrameMiniature> frames) {
             InitializeComponent();
             Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
@@ -53,7 +56,7 @@ namespace McBitFont {
             int space = (int)nudSpace.Value;
             int index = 0;
             for (int c = 0; c < encoded.Length; c++) {
-                // Check if we have suck symbol
+                // Check if we have such symbol
                 var f = frames.FindAll(x => x.code == encoded[c]);
                 if (f.Count == 1) {
                     // Draw the symbol
@@ -160,6 +163,42 @@ namespace McBitFont {
         private void Scrolling(object sender, EventArgs e) {
             dotPanel.Invalidate();
         }
+
+        private void Form_Resize(object sender, EventArgs e) {
+            btnCopy.Left = this.Width / 2 - 40;
+        }
+
+        private void Copy_Click(object sender, MouseEventArgs e) {
+            if (encoded.Length < 1) {
+                MessageBox.Show("Nothing to copy! Type some symbols first.", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            // Sycle through ecoded bytes of test text
+            int space = (int)nudSpace.Value;
+            int index = 0;
+            int i, j;
+            MainForm.FrameMiniature ff = new(0, width, frames[0].height);
+            for (int c = 0; c < encoded.Length; c++) {
+                // Check if we have such symbol
+                var f = frames.FindAll(x => x.code == encoded[c]);
+                if (f.Count == 1) {
+                    // Draw the symbol
+                    for (i = 0; i < f[0].width; i++) {
+                        for (j = 0; j < f[0].height; j++) {
+                            // Fill the frame with data
+                            ff.data[index + i, j] = f[0].data[i, j];
+                        }
+                    }
+                    index += (f[0].width > 0 ? f[0].width + space : 0);
+                } else {
+                    index += 5 + space;
+                }
+            }
+            // Copy the frame we made into Clipboard
+            var bb = MessagePackSerializer.Serialize(ChangeHistory.CopyFrameSimple(ff));
+            DataObject clpbObj = new DataObject(clpbFormat.Name, bb);
+            Clipboard.SetDataObject(clpbObj, true);
+        }
     }
 
 

McBitFont/Form1.Designer.cs

@@ -64,10 +64,12 @@
             openToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             saveToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             saveAsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
             importTextToolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
             importImageToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             exportToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             exportFontLayoutPNGToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();
             exitToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             editToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             undoToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
@@ -84,6 +86,7 @@
             removeBeforeToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             removeAfterToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             CodeShiftToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            toolStripSeparator3 = new System.Windows.Forms.ToolStripSeparator();
             testFontToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             canvasToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             ClearToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
@@ -110,9 +113,6 @@
             lblSelection = new System.Windows.Forms.Label();
             lblModified = new System.Windows.Forms.Label();
             dlgSavePNG = new System.Windows.Forms.SaveFileDialog();
-            toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
-            toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();
-            toolStripSeparator3 = new System.Windows.Forms.ToolStripSeparator();
             ((System.ComponentModel.ISupportInitialize)nudX).BeginInit();
             ((System.ComponentModel.ISupportInitialize)nudY).BeginInit();
             panel1.SuspendLayout();
@@ -370,7 +370,7 @@
             btnExport.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;
             toolTip1.SetToolTip(btnExport, "Configure and export data");
             btnExport.UseVisualStyleBackColor = true;
-            btnExport.Click += button1_Click;
+            btnExport.Click += Export_Click;
             // 
             // miniList
             // 
@@ -493,7 +493,10 @@
             // hScroll
             // 
             hScroll.Anchor = System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right;
+            hScroll.Enabled = false;
+            hScroll.LargeChange = 2;
             hScroll.Location = new System.Drawing.Point(14, 609);
+            hScroll.Maximum = 1;
             hScroll.Name = "hScroll";
             hScroll.Size = new System.Drawing.Size(427, 21);
             hScroll.TabIndex = 14;
@@ -502,8 +505,10 @@
             // vScroll
             // 
             vScroll.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right;
-            vScroll.LargeChange = 25;
+            vScroll.Enabled = false;
+            vScroll.LargeChange = 2;
             vScroll.Location = new System.Drawing.Point(444, 31);
+            vScroll.Maximum = 1;
             vScroll.Name = "vScroll";
             vScroll.Size = new System.Drawing.Size(21, 575);
             vScroll.TabIndex = 15;
@@ -535,7 +540,7 @@
             // 
             fileToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] { newToolStripMenuItem, openToolStripMenuItem, saveToolStripMenuItem, saveAsToolStripMenuItem, toolStripSeparator1, importTextToolStripMenuItem1, importImageToolStripMenuItem, exportToolStripMenuItem, exportFontLayoutPNGToolStripMenuItem, toolStripSeparator2, exitToolStripMenuItem });
             fileToolStripMenuItem.Name = "fileToolStripMenuItem";
-            fileToolStripMenuItem.Size = new System.Drawing.Size(122, 20);
+            fileToolStripMenuItem.Size = new System.Drawing.Size(37, 20);
             fileToolStripMenuItem.Text = "File";
             // 
             // newToolStripMenuItem
@@ -582,6 +587,11 @@
             saveAsToolStripMenuItem.ToolTipText = "Save changes to another file";
             saveAsToolStripMenuItem.Click += SaveToolStripMenuItem_Click;
             // 
+            // toolStripSeparator1
+            // 
+            toolStripSeparator1.Name = "toolStripSeparator1";
+            toolStripSeparator1.Size = new System.Drawing.Size(221, 6);
+            // 
             // importTextToolStripMenuItem1
             // 
             importTextToolStripMenuItem1.Image = Properties.Resources.folder_table;
@@ -609,7 +619,7 @@
             exportToolStripMenuItem.Size = new System.Drawing.Size(224, 22);
             exportToolStripMenuItem.Text = "Export";
             exportToolStripMenuItem.ToolTipText = "Configure and export data";
-            exportToolStripMenuItem.Click += button1_Click;
+            exportToolStripMenuItem.Click += Export_Click;
             // 
             // exportFontLayoutPNGToolStripMenuItem
             // 
@@ -620,6 +630,11 @@
             exportFontLayoutPNGToolStripMenuItem.ToolTipText = "Create an image with all a table showing all 256 symbols";
             exportFontLayoutPNGToolStripMenuItem.Click += ExportPNG;
             // 
+            // toolStripSeparator2
+            // 
+            toolStripSeparator2.Name = "toolStripSeparator2";
+            toolStripSeparator2.Size = new System.Drawing.Size(221, 6);
+            // 
             // exitToolStripMenuItem
             // 
             exitToolStripMenuItem.Image = Properties.Resources.Famfamfam_Silk_Door_out_16;
@@ -644,7 +659,7 @@
             undoToolStripMenuItem.Image = Properties.Resources.arrow_undo;
             undoToolStripMenuItem.Name = "undoToolStripMenuItem";
             undoToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.Z;
-            undoToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            undoToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             undoToolStripMenuItem.Text = "Undo";
             undoToolStripMenuItem.ToolTipText = "Undo last canvas change";
             undoToolStripMenuItem.Click += undoToolStripMenuItem_Click;
@@ -654,7 +669,7 @@
             redoToolStripMenuItem.Image = Properties.Resources.arrow_redo;
             redoToolStripMenuItem.Name = "redoToolStripMenuItem";
             redoToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.Y;
-            redoToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            redoToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             redoToolStripMenuItem.Text = "Redo";
             redoToolStripMenuItem.ToolTipText = "Redo canvas change";
             redoToolStripMenuItem.Click += redoToolStripMenuItem_Click;
@@ -665,19 +680,18 @@
             copyToolStripMenuItem.Name = "copyToolStripMenuItem";
             copyToolStripMenuItem.ShortcutKeyDisplayString = "";
             copyToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.C;
-            copyToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            copyToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             copyToolStripMenuItem.Text = "Copy";
             copyToolStripMenuItem.ToolTipText = "Copy current symbol to clipboard";
             copyToolStripMenuItem.Click += copyToolStripMenuItem_Click;
             // 
             // pasteToolStripMenuItem
             // 
-            pasteToolStripMenuItem.Enabled = false;
             pasteToolStripMenuItem.Image = Properties.Resources.Famfamfam_Silk_Page_paste_16;
             pasteToolStripMenuItem.Name = "pasteToolStripMenuItem";
             pasteToolStripMenuItem.ShortcutKeyDisplayString = "";
             pasteToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.V;
-            pasteToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            pasteToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             pasteToolStripMenuItem.Text = "Paste";
             pasteToolStripMenuItem.ToolTipText = "Paste from clipboard to current symbol";
             pasteToolStripMenuItem.Click += pasteToolStripMenuItem_Click;
@@ -687,7 +701,7 @@
             selectToolStripMenuItem.Image = Properties.Resources.fam_rectt;
             selectToolStripMenuItem.Name = "selectToolStripMenuItem";
             selectToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.R;
-            selectToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            selectToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             selectToolStripMenuItem.Text = "Select";
             selectToolStripMenuItem.ToolTipText = "Toggle Rectangle selection tool";
             selectToolStripMenuItem.Click += selectToolStripMenuItem_Click;
@@ -698,7 +712,7 @@
             selectAllToolStripMenuItem.Image = Properties.Resources.arrow_out;
             selectAllToolStripMenuItem.Name = "selectAllToolStripMenuItem";
             selectAllToolStripMenuItem.ShortcutKeys = System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.A;
-            selectAllToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            selectAllToolStripMenuItem.Size = new System.Drawing.Size(164, 22);
             selectAllToolStripMenuItem.Text = "Select All";
             selectAllToolStripMenuItem.ToolTipText = "Select entire canvas";
             selectAllToolStripMenuItem.Click += selectAllToolStripMenuItem_Click;
@@ -785,6 +799,11 @@
             CodeShiftToolStripMenuItem.ToolTipText = "Shift the font on the code line";
             CodeShiftToolStripMenuItem.Click += CodeShiftToolStripMenuItem_Click;
             // 
+            // toolStripSeparator3
+            // 
+            toolStripSeparator3.Name = "toolStripSeparator3";
+            toolStripSeparator3.Size = new System.Drawing.Size(212, 6);
+            // 
             // testFontToolStripMenuItem
             // 
             testFontToolStripMenuItem.Image = Properties.Resources.font;
@@ -1055,21 +1074,6 @@
             dlgSavePNG.DefaultExt = "png";
             dlgSavePNG.Filter = "PNG Image|*.png;*.PNG";
             // 
-            // toolStripSeparator1
-            // 
-            toolStripSeparator1.Name = "toolStripSeparator1";
-            toolStripSeparator1.Size = new System.Drawing.Size(221, 6);
-            // 
-            // toolStripSeparator2
-            // 
-            toolStripSeparator2.Name = "toolStripSeparator2";
-            toolStripSeparator2.Size = new System.Drawing.Size(221, 6);
-            // 
-            // toolStripSeparator3
-            // 
-            toolStripSeparator3.Name = "toolStripSeparator3";
-            toolStripSeparator3.Size = new System.Drawing.Size(212, 6);
-            // 
             // MainForm
             // 
             AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
@@ -1123,8 +1127,6 @@
         #endregion
 
         private System.Windows.Forms.Panel dotPanel;
-        private System.Windows.Forms.NumericUpDown nudX;
-        private System.Windows.Forms.NumericUpDown nudY;
         private System.Windows.Forms.Label label1;
         private System.Windows.Forms.Label label2;
         private System.Windows.Forms.Label lblType;
@@ -1139,8 +1141,6 @@
         private System.Windows.Forms.Button btnMirrorX;
         private System.Windows.Forms.Button btnMirrorY;
         private System.Windows.Forms.Button btnExport;
-        private System.Windows.Forms.ListView miniList;
-        private System.Windows.Forms.ImageList ilMiniatures;
         private System.Windows.Forms.Button btnApply;
         private System.Windows.Forms.HScrollBar hScroll;
         private System.Windows.Forms.VScrollBar vScroll;
@@ -1210,6 +1210,10 @@
         private System.Windows.Forms.ToolStripSeparator toolStripSeparator1;
         private System.Windows.Forms.ToolStripSeparator toolStripSeparator2;
         private System.Windows.Forms.ToolStripSeparator toolStripSeparator3;
+        public System.Windows.Forms.ListView miniList;
+        public System.Windows.Forms.ImageList ilMiniatures;
+        public System.Windows.Forms.NumericUpDown nudX;
+        public System.Windows.Forms.NumericUpDown nudY;
     }
 }
 

McBitFont/Form1.cs

@@ -47,23 +47,24 @@ namespace McBitFont {
             public List<FrameMiniature> frames;
         }
 
-        private FrameMiniature f;
+        public FrameMiniature f;
         public List<FrameMiniature> frames = new List<FrameMiniature>();
-        private CanvasHistory history = new();
+        //private CanvasHistory history = new();
+        private ChangeHistory history;
         private int cellSize = 10;
         public int dotWidth, dotHeight;
-        private int pixelOffset = 5;
+        private readonly int pixelOffset = 5;
         private int gap;
         private int w, h;
         public bool monospaced = false;
         private bool modified = false;
         private bool prjModified = false;
-        public const string version = "2.3";
+        public const string version = "2.5";
         public string prjName = "Untitled";
         public string prjFileName = "";
         public int codepage = 1251;
         private FrameMiniature fbuf;
-        private bool fbuffer = false;
+        private readonly DataFormats.Format clpbFormat = DataFormats.GetFormat("McBitFontFrame");
         private int baseline = 0;
         private bool set_base = false;
         private Point selection1, selection2;
@@ -75,7 +76,7 @@ namespace McBitFont {
             this.dotPanel.MouseWheel += new MouseEventHandler(this.DotPanel_MouseWheel);
         }
 
-        private void SetNewWH() {
+        public void SetNewWH() {
             w = pixelOffset + dotWidth * (cellSize + gap);
             h = pixelOffset + dotHeight * (cellSize + gap);
         }
@@ -84,7 +85,7 @@ namespace McBitFont {
             lblSelection.Text = width.ToString() + ',' + height.ToString();
         }
 
-        private void SetModified(bool modif = true, bool prj = false) {
+        public void SetModified(bool modif = true, bool prj = false) {
             string suffix = "";
             if (prj) {
                 prjModified = modif;
@@ -127,6 +128,8 @@ namespace McBitFont {
 
             fbuf = new FrameMiniature(0, dotWidth, dotHeight);
 
+            history = new(this);
+
             // Chek for arguments
             if (Environment.GetCommandLineArgs().Length > 1) {
                 LoadProject(Environment.GetCommandLineArgs()[1]);
@@ -138,6 +141,7 @@ namespace McBitFont {
             CodeShiftToolStripMenuItem.Visible = frames.Count > 1;
 
             CheckForAdd();
+            
         }
 
         [DllImport("user32.dll")]
@@ -147,9 +151,9 @@ namespace McBitFont {
             return (int)(((ushort)lowPart) | (uint)(highPart << 16));
         }
 
-        private FrameMiniature CopyFrame(FrameMiniature frame, bool clipboard = false) {
-            int width = chkRectSelect.Checked ? selection2.X - selection1.X + 1 : frame.width;
-            int height = chkRectSelect.Checked ? selection2.Y - selection1.Y + 1 : frame.height;
+        public FrameMiniature CopyFrame(FrameMiniature frame, bool clipboard = false) {
+            int width = chkRectSelect.Checked && clipboard ? selection2.X - selection1.X + 1 : frame.width;
+            int height = chkRectSelect.Checked && clipboard ? selection2.Y - selection1.Y + 1 : frame.height;
             var ff = new FrameMiniature(frame.code, width, height);
 
             if (chkRectSelect.Checked && clipboard) {
@@ -194,7 +198,7 @@ namespace McBitFont {
             }
         }
 
-        private void nudX_ValueChanged(object sender, EventArgs e) {
+        public void nudX_ValueChanged(object sender, EventArgs e) {
             Cursor.Current = Cursors.WaitCursor;
             if (monospaced) {
                 Bitmap bmp;
@@ -213,10 +217,13 @@ namespace McBitFont {
             }
 
             DotResize((int)nudX.Value, dotHeight);
+            if (monospaced) history.Add(frames);
+            else history.Add(f);
+            
             Cursor.Current = Cursors.Default;
         }
 
-        private void nudY_ValueChanged(object sender, EventArgs e) {
+        public void nudY_ValueChanged(object sender, EventArgs e) {
             Cursor.Current = Cursors.WaitCursor;
             Bitmap bmp;
             for (int i = 0; i < frames.Count; i++) {
@@ -233,6 +240,7 @@ namespace McBitFont {
             }
 
             DotResize(dotWidth, (int)nudY.Value);
+            history.Add(frames);
             Cursor.Current = Cursors.Default;
         }
 
@@ -278,9 +286,6 @@ namespace McBitFont {
             }
             SetNewWH();
             cbZoom_SelectedIndexChanged(cbZoom, null);
-
-            // Re-create history object
-            history = new CanvasHistory();
         }
 
         private void cbZoom_SelectedIndexChanged(object sender, EventArgs e) {
@@ -291,6 +296,7 @@ namespace McBitFont {
             if (w <= dotPanel.Width) {
                 hScroll.Enabled = false;
                 hScroll.Value = 0;
+                vScroll.Maximum = 0;
             } else {
                 hScroll.Maximum = w - dotPanel.Width + 12;
                 hScroll.Minimum = 0;
@@ -300,6 +306,7 @@ namespace McBitFont {
             if (h <= dotPanel.Height) {
                 vScroll.Enabled = false;
                 vScroll.Value = 0;
+                vScroll.Maximum = 0;
             } else {
                 vScroll.Maximum = h - dotPanel.Height + 12;
                 vScroll.Minimum = 0;
@@ -328,7 +335,6 @@ namespace McBitFont {
 
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (int i = x; i <= x2; i++) {
                 c = f.data[i, y];
                 for (int j = y; j <= y2; j++) {
@@ -339,7 +345,7 @@ namespace McBitFont {
                     }
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -351,7 +357,6 @@ namespace McBitFont {
 
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (int i = x; i <= x2; i++) {
                 c = f.data[i, y2];
                 for (int j = y2; j >= y; j--) {
@@ -362,7 +367,7 @@ namespace McBitFont {
                     }
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -374,7 +379,6 @@ namespace McBitFont {
 
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (int j = y; j <= y2; j++) {
                 c = f.data[x, j];
                 for (int i = x; i <= x2; i++) {
@@ -385,7 +389,7 @@ namespace McBitFont {
                     }
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -396,7 +400,6 @@ namespace McBitFont {
             bool c;
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (int j = y; j <= y2; j++) {
                 c = f.data[x2, j];
                 for (int i = x2; i >= x; i--) {
@@ -407,18 +410,54 @@ namespace McBitFont {
                     }
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
         }
 
-        private bool mouseDown = false;
-        private bool fChanged = false;
+        private bool mouseDown = false; // Used in canvas history tracking and rectangle selection logics
+        private bool fChanged = false; // Used in canvas history (undo / redo) tracking
+        private bool mouseDownMiddle = false; // Used in middle mouse dragging logic
+        private int mouseX, mouseY; // To remember last mouse X and Y (used in middle mouse dragging logic)
+        private int lastX = 0, lastY = 0; // Used for drawing straight lines
         private void dotPanel_MouseMove(object sender, MouseEventArgs e) {
             var rectSel = chkRectSelect.Checked;
             bool rectSelUpdated = false;
 
+            // Drag with middle mouse button
+            if (vScroll.Enabled || hScroll.Enabled) {
+                if (mouseDownMiddle) {
+                    var dY = mouseY - e.Y <= -cellSize - gap || mouseY - e.Y >= cellSize + gap;
+                    var dX = mouseX - e.X <= -cellSize - gap || mouseX - e.X >= cellSize + gap;
+                    int newY = vScroll.Value;
+                    int newX = hScroll.Value;
+                    if (dX) {
+                        newX += (mouseX - e.X);
+                        if (newX < hScroll.Minimum) newX = hScroll.Minimum;
+                        if (newX > hScroll.Maximum) newX = hScroll.Maximum;
+                        mouseX = e.X;
+                        hScroll.Value = newX;
+                    }
+                    if (dY) {
+                        newY += (mouseY - e.Y);
+                        if (newY < vScroll.Minimum) newY = vScroll.Minimum;
+                        if (newY > vScroll.Maximum) newY = vScroll.Maximum;
+                        mouseY = e.Y;
+                        vScroll.Value = newY;
+                    }
+                }
+                if (!mouseDownMiddle && e.Button == MouseButtons.Middle) {
+                    mouseDownMiddle = true;
+                    mouseX = e.X;
+                    mouseY = e.Y;
+                }
+                if (mouseDownMiddle && e.Button == MouseButtons.None) {
+                    mouseDownMiddle = false;
+                }
+            }
+            
+
             // Moving baseline
             Rectangle rect1, rect2;
             if (set_base) {
@@ -457,6 +496,7 @@ namespace McBitFont {
                 }
             }
             if (e.Button != MouseButtons.None && !mouseDown) {
+                // Started to move a mouse with button held
                 mouseDown = true;
                 if (rectSel) {
                     selection1.X = i;
@@ -464,20 +504,18 @@ namespace McBitFont {
                     selection2.X = i;
                     selection2.Y = j;
                     dotPanel.Invalidate();
-                } else history.AddPre(f, false);
+                } //else history.AddPre(f, false);
             }
             if (e.Button == MouseButtons.None && mouseDown) {
+                // Released a mouse button
                 mouseDown = false;
                 if (rectSel) {
                     NormPoints(ref selection1, ref selection2);
                     dotPanel.Invalidate();
                 } else {
-                    if (!fChanged) {
-                        history.Remove(false);
-                    } else {
+                    if (fChanged) { 
                         fChanged = false;
-                        history.ApplyAdded();
-                        history.AddPost(f);
+                        history.Add(f);
                     }
                     CheckHistoryButtons();
                 }
@@ -514,6 +552,15 @@ namespace McBitFont {
                 return;
             }
 
+            // Check for Shift / Ctrl keys for straight lines
+            if (ModifierKeys.HasFlag(Keys.Shift)) {
+                j = lastY;
+            } else if (ModifierKeys.HasFlag(Keys.Control)) {
+                i = lastX;
+            }
+            lastX = i;
+            lastY = j;
+
             // Paint black / white
             if (e.Button == MouseButtons.Left && !f.data[i, j]) {
                 f.data[i, j] = true;
@@ -539,8 +586,6 @@ namespace McBitFont {
         private void btnInvert_Click(object sender, EventArgs e) {
             int x, y, x2, y2;
 
-            history.AddPre(f);
-
             (x, y, x2, y2) = RectSelCoords();
 
             for (int i = x; i <= x2; i++) {
@@ -549,7 +594,7 @@ namespace McBitFont {
                 }
             }
 
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -561,7 +606,6 @@ namespace McBitFont {
 
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (j = y; j <= y2; j++) {
                 a = x;
                 b = x2;
@@ -573,7 +617,7 @@ namespace McBitFont {
                     b--;
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -585,7 +629,6 @@ namespace McBitFont {
 
             (x, y, x2, y2) = RectSelCoords();
 
-            history.AddPre(f);
             for (i = x; i <= x2; i++) {
                 a = y;
                 b = y2;
@@ -597,13 +640,13 @@ namespace McBitFont {
                     b--;
                 }
             }
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
         }
 
-        private void button1_Click(object sender, EventArgs e) {
+        private void Export_Click(object sender, EventArgs e) {
             if (modified) {
                 if (MessageBox.Show("Current symbol is modified.\nDo you want to save the changes?", "Symbol was modified!", MessageBoxButtons.YesNo) == DialogResult.Yes) {
                     SaveFrame();
@@ -635,7 +678,7 @@ namespace McBitFont {
             SetModified(true, true);
         }
 
-        private static Bitmap GetMiniPictue(FrameMiniature m) {
+        public static Bitmap GetMiniPictue(FrameMiniature m) {
             int picSize = (m.width > m.height) ? m.width : m.height;
             var bmp = new Bitmap(picSize, picSize);
             int imin = m.width < picSize ? (picSize - m.width) / 2 : 0;
@@ -647,7 +690,7 @@ namespace McBitFont {
                     bmp.SetPixel(i + imin, j + jmin, c);
                 }
             }
-            Bitmap sbmp = new Bitmap(50, 50);
+            Bitmap sbmp = new(50, 50);
             using (Graphics g = Graphics.FromImage(sbmp)) {
                 g.InterpolationMode = InterpolationMode.NearestNeighbor;
                 g.PixelOffsetMode = PixelOffsetMode.Half;
@@ -768,7 +811,6 @@ namespace McBitFont {
                 FrameMiniature newf;
                 if (form.cbSingle.Checked) {
                     frames.Add(new FrameMiniature(0, neww, newh));
-                    //f = frames.Find(x => x.code == 0);
                     append = "Single";
                     monospaced = false;
                 } else {
@@ -817,13 +859,11 @@ namespace McBitFont {
                 SetWindowCap();
                 SetModified(false); ;
                 CheckForAdd();
-                fbuffer = false;
                 miniList.Items[0].Selected = true;
                 miniList.Refresh();
                 dotPanel.Refresh();
 
-                // Re-create history object
-                history = new CanvasHistory();
+                history.Clear();
 
                 Cursor.Current = Cursors.Default;
             }
@@ -839,14 +879,10 @@ namespace McBitFont {
                 tsmiRemoveSymbol.Enabled = false;
                 tsmiRemoveBefore.Enabled = false;
                 tsmiRemoveAfter.Enabled = false;
-                //copyToolStripMenuItem.Enabled = false;
-                pasteToolStripMenuItem.Enabled = false;
-                return;
-                //miniList.Items[0].Selected = true;
-            }
 
-            // Clear history
-            history.Clear();
+                return;
+            }
+            dotPanel.SuspendLayout();
 
             var sel = miniList.SelectedItems[0];
             int code = Convert.ToInt32(sel.ImageKey);
@@ -854,7 +890,10 @@ namespace McBitFont {
             nudX.Value = ff.width;
             nudY.Value = ff.height;
             f = ff;
-            dotPanel.Refresh();
+            
+
+            history.Add(code);
+
             ff = frames.Find(x => x.code == code);
             if (frames.Count > 1 && (ff.Equals(frames.First()) || ff.Equals(frames.Last()))) {
                 removeSymbolToolStripMenuItem.Enabled = true;
@@ -863,7 +902,10 @@ namespace McBitFont {
                 removeSymbolToolStripMenuItem.Enabled = false;
                 tsmiRemoveSymbol.Enabled = false;
             }
-            //copyToolStripMenuItem.Enabled = true;
+
+            dotPanel.ResumeLayout();
+            dotPanel.Refresh();
+
             if (frames.Count > 1 && ff.Equals(frames.First())) {
                 removeBeforeToolStripMenuItem.Enabled = false;
                 removeAfterToolStripMenuItem.Enabled = true;
@@ -881,8 +923,6 @@ namespace McBitFont {
                 tsmiRemoveAfter.Enabled = true;
             }
 
-            if (fbuffer) pasteToolStripMenuItem.Enabled = true;
-            else pasteToolStripMenuItem.Enabled = false;
         }
 
         private void SaveToolStripMenuItem_Click(object sender, EventArgs e) {
@@ -892,6 +932,16 @@ namespace McBitFont {
             }
         }
 
+        public void FillFrameLists() {
+            foreach (FrameMiniature f in frames) {
+                var s = f.code.ToString().PadLeft(3, '0');
+                var sHex = 'x' + Convert.ToString(f.code, 16).PadLeft(2, '0').ToUpper();
+                var sss = DecodeSymbol(f.code);
+                ilMiniatures.Images.Add(s, (Image)GetMiniPictue(f));
+                miniList.Items.Add(s, (chkHexCodes.Checked ? sHex : s) + ' ' + sss, s);
+            }
+        }
+
         private void LoadProject(string filename) {
             SaveBlock sav;
 
@@ -909,13 +959,7 @@ namespace McBitFont {
             tsmiMakeVarWidth.Visible = monospaced;
             miniList.Items.Clear();
             ilMiniatures.Images.Clear();
-            foreach (FrameMiniature ff in frames) {
-                var s = ff.code.ToString().PadLeft(3, '0');
-                var sHex = 'x' + Convert.ToString(ff.code, 16).PadLeft(2, '0').ToUpper();
-                var sss = DecodeSymbol(ff.code);
-                ilMiniatures.Images.Add(s, (Image)GetMiniPictue(ff));
-                miniList.Items.Add(s, (chkHexCodes.Checked ? sHex : s) + ' ' + sss, s);
-            }
+            FillFrameLists();
             nudX.ValueChanged -= nudX_ValueChanged;
             nudY.ValueChanged -= nudY_ValueChanged;
             nudX.Value = frames.First().width;
@@ -940,11 +984,8 @@ namespace McBitFont {
             miniList.Items[0].Selected = true;
 
             CheckForAdd();
-            fbuffer = false;
-            //copyToolStripMenuItem.Enabled = true;
 
-            // Re-create history object
-            history = new CanvasHistory();
+            history.Clear();
 
             tsmiMakeVarWidth.Visible = monospaced;
             makeVarWidthToolStripMenuItem.Visible = monospaced;
@@ -994,9 +1035,11 @@ namespace McBitFont {
             var sel = miniList.SelectedItems[0].ImageKey;
             int code = Convert.ToInt32(miniList.SelectedItems[0].ImageKey);
             FrameMiniature ff = frames.Find(x => x.code == code);
+            bool isLast = frames.Last().Equals(ff);
             frames.Remove(ff);
             miniList.SelectedItems[0].Remove();
-            //miniList.Items[0].Selected = true;
+
+            miniList.Items[isLast ? miniList.Items.Count - 1 : 0].Selected = true;
         }
 
         private void prependSymbolToolStripMenuItem_Click(object sender, EventArgs e) {
@@ -1041,16 +1084,22 @@ namespace McBitFont {
         }
 
         private void copyToolStripMenuItem_Click(object sender, EventArgs e) {
-            fbuffer = true;
-            fbuf = CopyFrame(f, true);
-            pasteToolStripMenuItem.Enabled = true;
+            var bb = MessagePackSerializer.Serialize(CopyFrame(f, true));
+            DataObject clpbObj = new DataObject(clpbFormat.Name, bb);
+            Clipboard.SetDataObject(clpbObj, true);
         }
 
         private void pasteToolStripMenuItem_Click(object sender, EventArgs e) {
-            history.AddPre(f);
-            if (fbuf.width == f.width && fbuf.height == f.height) {
-                Array.Copy(fbuf.data, f.data, fbuf.data.Length);
-            } else {
+            // Try to read from clipboard
+            try {
+                IDataObject clpbObj = Clipboard.GetDataObject();
+                byte[] bb = (byte[])clpbObj.GetData(clpbFormat.Name);
+                fbuf = MessagePackSerializer.Deserialize<FrameMiniature>(bb);
+            }
+            catch {
+                return;
+            }
+
             int di, dj, wmax, hmax, selw, selh;
             if (chkRectSelect.Checked) {
                 di = selection1.X;
@@ -1071,8 +1120,8 @@ namespace McBitFont {
                     f.data[i + di, j + dj] = fbuf.data[i, j];
                 }
             }
-            }
-            history.AddPost(f);
+
+            history.Add(f);
             CheckHistoryButtons();
             dotPanel.Refresh();
             SetModified();
@@ -1121,8 +1170,6 @@ namespace McBitFont {
         private void FillFrame(bool val) {
             int x, y, x2, y2;
 
-            history.AddPre(f);
-
             (x, y, x2, y2) = RectSelCoords();
 
             for (int i = x; i <= x2; i++) {
@@ -1131,7 +1178,7 @@ namespace McBitFont {
                 }
             }
 
-            history.AddPost(f);
+            history.Add(f);
             CheckHistoryButtons();
             SetModified();
             dotPanel.Refresh();
@@ -1212,13 +1259,13 @@ namespace McBitFont {
         }
 
         private void undoToolStripMenuItem_Click(object sender, EventArgs e) {
-            history.Undo(f);
+            history.Undo();
             dotPanel.Refresh();
             CheckHistoryButtons();
         }
 
         private void redoToolStripMenuItem_Click(object sender, EventArgs e) {
-            history.Redo(f);
+            history.Redo();
             dotPanel.Refresh();
             CheckHistoryButtons();
         }
@@ -1269,13 +1316,12 @@ namespace McBitFont {
         private void importImageToolStripMenuItem_Click(object sender, EventArgs e) {
             ImageImporter iform = new ImageImporter(f.width, f.height);
             if (iform.ShowDialog() == DialogResult.OK) {
-                history.AddPre(f);
                 for (int i = 0; i < iform.bmpScaled.Width; i++) {
                     for (int j = 0; j < iform.bmpScaled.Height; j++) {
                         f.data[i, j] = iform.bmpScaled.GetPixel(i, j).ToArgb().Equals(Color.Black.ToArgb());
                     }
                 }
-                history.AddPost(f);
+                history.Add(f);
                 CheckHistoryButtons();
                 dotPanel.Refresh();
                 SetModified();

McBitFont/McBitFont.csproj

@@ -20,9 +20,9 @@
     <UseWindowsForms>true</UseWindowsForms>
     <ImportWindowsDesktopTargets>true</ImportWindowsDesktopTargets>
     <ApplicationIcon>icon_64.ico</ApplicationIcon>
-    <AssemblyVersion>2.3.0.0</AssemblyVersion>
-    <FileVersion>2.3.0.0</FileVersion>
-    <Version>$(VersionPrefix)2.3.0</Version>
+    <AssemblyVersion>2.5.0.0</AssemblyVersion>
+    <FileVersion>2.5.0.0</FileVersion>
+    <Version>$(VersionPrefix)2.5.0</Version>
     <Copyright>Anton Mukhin</Copyright>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

README.md

@@ -8,6 +8,9 @@ Features:
 - Import an image
 - Save / Load your project for later edits
 - Export as a C array in different formats
+- Import from text C array
+- Export to a PNG image showing all the characters in a table
+- Test your font in special dialog
 
 Requires:
 - Windows 7+
@@ -17,6 +20,8 @@ Some basic hints on the interface:
 - Mouse 1 to mark a pixel black
 - Mouse 2 to mark a pixel white
 - Drag the mouse holding a button to draw pixels
+- Hold Shift to constrain painting horizontally
+- Hold Ctrl to constrain painting vertically
 - Mouse Scroll to scroll up and down
 - Shift + scroll to scroll left and right
 - Crtl + scroll to zoom

TODO.txt

@@ -1,10 +1,11 @@
 Application:
 - Consider migrating to WPF in order to make DPI aware UI
 
+
 Functionality:
-V Allow to add frames to Single-frame "fonts"
-V Type a string to see the result (test the font)
-V Export image with All characers table
+V Middle mouse - drag the canvas
+V Straight line painting (hold Shift / Ctrl)
+V A button to Copy from Test font dialog to then paste into another frame
 
 Bugs:
-- In some cases after switching to a symbol dotPanel mouse move causes "Out of range" exception (history.Pre after width change?)
+V Nothing selected after removing a symbol. Potential error throw on "Apply"