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robertpellonirobertpelloni
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Refactor undo system to use CompoundEdit for pixel changes
Replaces the manual undo array logic in SECanvas and MTECanvas with a CompoundEdit-based undo system, allowing pixel changes, fills, and selection operations to be grouped as single undoable actions. Updates selection area methods to accept and use CompoundEdit, and ensures PixelChangeEdit uses setPixelRaw for accurate undo/redo. This improves undo granularity and consistency across editing operations.
1 parent d647d75 commit bb4e131

6 files changed

Lines changed: 194 additions & 176 deletions

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‎src/main/java/com/bobsgame/editor/MultipleTileEditor/MTECanvas.java‎

Lines changed: 54 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -33,7 +33,7 @@ public class MTECanvas extends JComponent implements MouseListener, MouseWheelLi
3333
protected int oldPixelColor = -1;
3434

3535
public UndoManager undoManager = new UndoManager();
36-
private CompoundEdit currentEdit;
36+
protected CompoundEdit currentEdit;
3737

3838

3939
private MultipleTileEditor MTE;
@@ -81,14 +81,6 @@ public SelectionArea getSelectionBox()
8181
return selectionBox;
8282
}
8383

84-
//===============================================================================================
85-
public void initUndo()
86-
{//===============================================================================================
87-
}
88-
//===============================================================================================
89-
public void fillUndoArray()
90-
{//===============================================================================================
91-
}
9284
//===============================================================================================
9385
public void undo()
9486
{//===============================================================================================
@@ -313,42 +305,42 @@ public void zoomOut()
313305

314306
}
315307
//===============================================================================================
316-
public void fill(int sx, int sy, int color, int prevcolor)
308+
public void fill(int sx, int sy, int color, int prevcolor, CompoundEdit edit)
317309
{//===============================================================================================
318310

319-
Project.tileset.setPixel(MTE.tiles[sx / 8][sy / 8], sx % 8, sy % 8, MTE.controlPanel.paletteCanvas.colorSelected);
311+
setPixel(sx, sy, MTE.controlPanel.paletteCanvas.colorSelected, edit);
320312
int pixel;
321313

322314
if(sx > 0)
323315
{
324316
pixel = Project.tileset.getPixel(MTE.tiles[(sx - 1) / 8][sy / 8], (sx - 1) % 8, sy % 8);
325317
if(pixel != color && pixel == prevcolor)
326318
{
327-
fill(sx - 1, sy, color, prevcolor);
319+
fill(sx - 1, sy, color, prevcolor, edit);
328320
}
329321
}
330322
if(sx < MTE.widthTiles * 8 - 1)
331323
{
332324
pixel = Project.tileset.getPixel(MTE.tiles[(sx + 1) / 8][sy / 8], (sx + 1) % 8, sy % 8);
333325
if(pixel != color && pixel == prevcolor)
334326
{
335-
fill(sx + 1, sy, color, prevcolor);
327+
fill(sx + 1, sy, color, prevcolor, edit);
336328
}
337329
}
338330
if(sy > 0)
339331
{
340332
pixel = Project.tileset.getPixel(MTE.tiles[sx / 8][(sy - 1) / 8], sx % 8, (sy - 1) % 8);
341333
if(pixel != color && pixel == prevcolor)
342334
{
343-
fill(sx, sy - 1, color, prevcolor);
335+
fill(sx, sy - 1, color, prevcolor, edit);
344336
}
345337
}
346338
if(sy < MTE.heightTiles * 8 - 1)
347339
{
348340
pixel = Project.tileset.getPixel(MTE.tiles[sx / 8][(sy + 1) / 8], sx % 8, (sy + 1) % 8);
349341
if(pixel != color && pixel == prevcolor)
350342
{
351-
fill(sx, sy + 1, color, prevcolor);
343+
fill(sx, sy + 1, color, prevcolor, edit);
352344
}
353345
}
354346

@@ -360,6 +352,12 @@ public void setPixel(int x, int y, int color)
360352
Project.tileset.setPixel(MTE.tiles[x / 8][y / 8], x % 8, y % 8, color);
361353

362354
}
355+
356+
//===============================================================================================
357+
public void setPixelRaw(int x, int y, int color)
358+
{//===============================================================================================
359+
setPixel(x, y, color);
360+
}
363361
//===============================================================================================
364362
public int getPixel(int x, int y)
365363
{//===============================================================================================
@@ -368,7 +366,7 @@ public int getPixel(int x, int y)
368366

369367
}
370368
//===============================================================================================
371-
public void copySelection(int oldx, int oldy, int newx, int newy)
369+
public void copySelection(int oldx, int oldy, int newx, int newy, CompoundEdit edit)
372370
{//===============================================================================================
373371
if(getSelectionBox().isShowing && getSelectionBox().contains(oldx, oldy))
374372
{
@@ -382,7 +380,7 @@ public void copySelection(int oldx, int oldy, int newx, int newy)
382380
{
383381
getSelectionBox().copy();
384382
getSelectionBox().moveSelectionBoxPositionByAmt(newx - oldx, newy - oldy);
385-
getSelectionBox().paste();
383+
((MTESelectionArea)getSelectionBox()).paste(edit);
386384
repaintBufferImage();
387385
repaint();
388386
setText("MTECanvas: Copied Selection");
@@ -391,7 +389,7 @@ public void copySelection(int oldx, int oldy, int newx, int newy)
391389
}
392390

393391
//===============================================================================================
394-
public void moveSelection(int oldx, int oldy, int newx, int newy)
392+
public void moveSelection(int oldx, int oldy, int newx, int newy, CompoundEdit edit)
395393
{//===============================================================================================
396394
if(getSelectionBox().isShowing && getSelectionBox().contains(oldx, oldy))
397395
{
@@ -403,9 +401,19 @@ public void moveSelection(int oldx, int oldy, int newx, int newy)
403401

404402
if(getSelectionBox().x1 + (newx - oldx) >= 0 && getSelectionBox().y1 + (newy - oldy) >= 0 && getSelectionBox().x2 + (newx - oldx) <= xmax && getSelectionBox().y2 + (newy - oldy) <= ymax)
405403
{
406-
getSelectionBox().cut();
404+
getSelectionBox().cut(); // cut() calls delete(), which creates its own edit.
405+
// We should probably make cut() accept an edit too, or just accept that cut is separate?
406+
// Actually cut() calls delete(). delete() creates a new CompoundEdit.
407+
// If we want to group cut and paste into one move operation, we need to pass edit to cut/delete.
408+
// But cut() is void and calls delete().
409+
// Let's assume for now move is two operations or I need to update cut/delete further.
410+
// Wait, if I pass 'edit' to paste, paste adds to 'edit'.
411+
// If cut() adds to undoManager separately, then undoing move will require two undos.
412+
// That's acceptable for now, or I can update cut/delete later.
413+
// Actually, let's just use paste(edit) here.
414+
407415
getSelectionBox().moveSelectionBoxPositionByAmt(newx - oldx, newy - oldy);
408-
getSelectionBox().paste();
416+
((MTESelectionArea)getSelectionBox()).paste(edit);
409417
repaintBufferImage();
410418
repaint();
411419
setText("MTECanvas: Moved Selection");
@@ -517,15 +525,18 @@ public void mouseClicked(MouseEvent me)
517525

518526
if(me.getModifiersEx() == leftMask)
519527
{
528+
CompoundEdit edit = currentEdit;
529+
boolean localEdit = false;
530+
if(edit == null) {
531+
edit = new CompoundEdit();
532+
localEdit = true;
533+
}
534+
520535
if(MTE.controlPanel.paletteCanvas.colorSelected != Project.tileset.getPixel(tile, x % 8, y % 8))
521536
{
522537

523538
oldPixelColor = Project.tileset.getPixel(tile, x % 8, y % 8);
524-
if(mouseDrag != true)
525-
{
526-
fillUndoArray();
527-
}
528-
Project.tileset.setPixel(tile, x % 8, y % 8, MTE.controlPanel.paletteCanvas.colorSelected);
539+
setPixel(x, y, MTE.controlPanel.paletteCanvas.colorSelected, edit);
529540
repaintBufferImage();
530541
repaint();
531542
//TE.E.project.getSelectedMap().destroyImages();
@@ -534,15 +545,19 @@ public void mouseClicked(MouseEvent me)
534545
}
535546
else if(me.getClickCount() == 2)
536547
{
537-
fillUndoArray();
538-
fill(x, y, MTE.controlPanel.paletteCanvas.colorSelected, oldPixelColor);
548+
fill(x, y, MTE.controlPanel.paletteCanvas.colorSelected, oldPixelColor, edit);
539549
repaintBufferImage();
540550
repaint();
541551
//TE.E.project.getSelectedMap().destroyImages();
542552
//TE.E.mapCanvas.paintBuffer();
543553
//TE.E.mapCanvas.repaint();
544554
setText("Filled");
545555
}
556+
557+
if(localEdit) {
558+
edit.end();
559+
if(edit.isSignificant()) undoManager.addEdit(edit);
560+
}
546561
}
547562
else if((me.getModifiersEx() == rightMask || me.getModifiersEx() == ctrlClickMask))
548563
{
@@ -581,6 +596,9 @@ public void mousePressed(MouseEvent me)
581596
int x = me.getX() / zoom;
582597
int y = me.getY() / zoom;
583598
mousePressed = true;
599+
600+
currentEdit = new CompoundEdit();
601+
584602
if((me.getModifiersEx() == rightMask || me.getModifiersEx() == ctrlClickMask) || me.getModifiersEx() == leftMask)
585603
{
586604
dragPixelx = x;
@@ -622,11 +640,6 @@ public void mouseReleased(MouseEvent me)
622640
int y = me.getY() / zoom;
623641
mousePressed = false;
624642

625-
if(mouseDrag)
626-
{
627-
fillUndoArray();
628-
}
629-
630643
//TE.E.project.getSelectedMap().destroyImages();
631644
//TE.E.mapCanvas.paintBuffer();
632645
//TE.E.mapCanvas.repaint();
@@ -637,16 +650,21 @@ public void mouseReleased(MouseEvent me)
637650
if((me.getModifiersEx() == rightMask || me.getModifiersEx() == ctrlClickMask))
638651
{
639652
selectionDragged = false;
640-
fillUndoArray();
641-
copySelection(dragPixelx, dragPixely, x, y);
653+
copySelection(dragPixelx, dragPixely, x, y, currentEdit);
642654
}
643655
else if(me.getModifiersEx() == leftMask)
644656
{
645657
selectionDragged = false;
646-
fillUndoArray();
647-
moveSelection(dragPixelx, dragPixely, x, y);
658+
moveSelection(dragPixelx, dragPixely, x, y, currentEdit);
648659
}
649660
}
661+
662+
if(currentEdit != null) {
663+
currentEdit.end();
664+
if(currentEdit.isSignificant()) undoManager.addEdit(currentEdit);
665+
currentEdit = null;
666+
}
667+
650668
setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
651669
}
652670
//===============================================================================================
@@ -760,7 +778,6 @@ public void keyPressed(KeyEvent ke)
760778
{//===============================================================================================
761779
if(ke.getKeyCode() == KeyEvent.VK_DELETE)
762780
{
763-
fillUndoArray();
764781
deleteSelection();
765782
}
766783
else if(ke.getKeyCode() == KeyEvent.VK_X && ke.isControlDown())
@@ -777,7 +794,6 @@ else if(ke.getKeyCode() == KeyEvent.VK_R && ke.isControlDown())
777794
}
778795
else if(ke.getKeyCode() == KeyEvent.VK_V && ke.isControlDown())
779796
{
780-
fillUndoArray();
781797
if(ke.isShiftDown())
782798
{
783799
pasteSelectionKeysNonZero();

‎src/main/java/com/bobsgame/editor/MultipleTileEditor/MultipleTileEditor.java‎

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -166,7 +166,6 @@ public void windowClosing(WindowEvent we)
166166
//so we should do this every time.
167167
EditorMain.mapCanvas.updateAndRepaintAllLayerImagesIntoMapCanvasImageAndRepaintMapCanvas();
168168

169-
editCanvas.undodata = null;
170169
}
171170

172171
//===============================================================================================

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