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Add brush preview overlay to MaskTool

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Introduces a brush preview overlay using a separate preview canvas in MaskTool. Mouse event handlers in CanvasInteractions and MaskTool are updated to support passing both world and view coordinates, enabling accurate brush preview rendering. The preview is shown or hidden appropriately on mouse enter/leave and while drawing.
This commit is contained in:
Dariusz L
2025-06-28 07:37:53 +02:00
parent 940f027b40
commit a1e00ca06a
3 changed files with 105 additions and 14 deletions
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37
js/CanvasInteractions.js
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@@ -34,11 +34,13 @@ export class CanvasInteractions {
this.canvas.canvas.addEventListener('keydown', this.handleKeyDown.bind(this));
this.canvas.canvas.addEventListener('keyup', this.handleKeyUp.bind(this));
this.canvas.canvas.addEventListener('mouseenter', () => {
this.canvas.canvas.addEventListener('mouseenter', (e) => {
this.canvas.isMouseOver = true;
this.handleMouseEnter(e);
});
this.canvas.canvas.addEventListener('mouseleave', () => {
this.canvas.canvas.addEventListener('mouseleave', (e) => {
this.canvas.isMouseOver = false;
this.handleMouseLeave(e);
});
}
@@ -56,14 +58,14 @@ export class CanvasInteractions {
handleMouseDown(e) {
this.canvas.canvas.focus();
const worldCoords = this.canvas.getMouseWorldCoordinates(e);
const viewCoords = this.canvas.getMouseViewCoordinates(e);
if (this.canvas.maskTool.isActive) {
if (e.button === 1) {
this.startPanning(e);
this.canvas.render();
return;
} else {
this.canvas.maskTool.handleMouseDown(worldCoords, viewCoords);
}
this.canvas.maskTool.handleMouseDown(worldCoords);
this.canvas.render();
return;
}
@@ -110,6 +112,7 @@ export class CanvasInteractions {
handleMouseMove(e) {
const worldCoords = this.canvas.getMouseWorldCoordinates(e);
const viewCoords = this.canvas.getMouseViewCoordinates(e);
this.canvas.lastMousePosition = worldCoords;
if (this.canvas.maskTool.isActive) {
@@ -117,8 +120,10 @@ export class CanvasInteractions {
this.panViewport(e);
return;
}
this.canvas.maskTool.handleMouseMove(worldCoords);
if (this.canvas.maskTool.isDrawing) this.canvas.render();
this.canvas.maskTool.handleMouseMove(worldCoords, viewCoords);
if (this.canvas.maskTool.isDrawing) {
this.canvas.render();
}
return;
}
@@ -148,13 +153,13 @@ export class CanvasInteractions {
}
handleMouseUp(e) {
const viewCoords = this.canvas.getMouseViewCoordinates(e);
if (this.canvas.maskTool.isActive) {
if (this.interaction.mode === 'panning') {
this.resetInteractionState();
this.canvas.render();
return;
} else {
this.canvas.maskTool.handleMouseUp(viewCoords);
}
this.canvas.maskTool.handleMouseUp();
this.canvas.render();
return;
}
@@ -176,8 +181,12 @@ export class CanvasInteractions {
}
handleMouseLeave(e) {
const viewCoords = this.canvas.getMouseViewCoordinates(e);
if (this.canvas.maskTool.isActive) {
this.canvas.maskTool.handleMouseUp();
this.canvas.maskTool.handleMouseLeave();
if (this.canvas.maskTool.isDrawing) {
this.canvas.maskTool.handleMouseUp(viewCoords);
}
this.canvas.render();
return;
}
@@ -187,6 +196,12 @@ export class CanvasInteractions {
}
}
handleMouseEnter(e) {
if (this.canvas.maskTool.isActive) {
this.canvas.maskTool.handleMouseEnter();
}
}
handleWheel(e) {
e.preventDefault();
if (this.canvas.maskTool.isActive) {