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https://github.com/lospec/pixel-editor.git
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first commit
This commit is contained in:
Sam Keddy
210
js/_mouseEvents.js
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210
js/_mouseEvents.js
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//mousedown - start drawing
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window.addEventListener("mousedown", function (mouseEvent) {
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//if no document has been created yet, or this is a dialog open
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if (!documentCreated || dialogueOpen) return;
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//prevent right mouse clicks and such, which will open unwanted menus
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//mouseEvent.preventDefault();
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lastPos = getCursorPosition(mouseEvent);
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dragging = true;
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//left or right click
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if (mouseEvent.which == 1) {
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if (spacePressed)
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currentTool = 'pan';
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else if (mouseEvent.altKey)
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currentTool = 'eyedropper';
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else if (mouseEvent.target == canvas && currentTool == 'pencil')
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new HistoryStateEditCanvas();
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//saveHistoryState({type: 'canvas', canvas: context.getImageData(0, 0, canvasSize[0], canvasSize[1])});
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updateCursor();
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draw(mouseEvent);
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}
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else if (currentTool == 'pencil' && mouseEvent.which == 3) {
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currentTool = 'resize-brush';
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prevBrushSize=brushSize;
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}
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if (currentTool == 'eyedropper' && mouseEvent.target == canvas)
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eyedropperPreview.style.display = 'block';
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return false;
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}, false);
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//mouseup - end drawing
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window.addEventListener("mouseup", function (mouseEvent) {
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closeMenu();
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if (!documentCreated || dialogueOpen) return;
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if (currentTool == 'eyedropper' && mouseEvent.target == canvas) {
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var cursorLocation = getCursorPosition(mouseEvent);
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var selectedColor = context.getImageData(Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom),1,1);
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var newColor = rgbToHex(selectedColor.data[0],selectedColor.data[1],selectedColor.data[2]);
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console.log(newColor);
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var colors = document.getElementsByClassName('color-button');
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for (var i = 0; i < colors.length; i++) {
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console.log(colors[i].jscolor.toString());
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//if picked color matches this color
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if (newColor == colors[i].jscolor.toString()) {
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console.log('color found');
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//remove current color selection
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var selectedColor = document.querySelector("#colors-menu li.selected")
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if (selectedColor) selectedColor.classList.remove("selected");
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//set current color
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context.fillStyle = '#'+newColor;
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//make color selected
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colors[i].parentElement.classList.add('selected');
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//hide eyedropper
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eyedropperPreview.style.display = 'none';
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}
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}
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}
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else if (currentTool == 'fill' && mouseEvent.target == canvas) {
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console.log('filling')
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//if you clicked on anything but the canvas, do nothing
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if (!mouseEvent.target == canvas) return;
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//get cursor postion
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var cursorLocation = getCursorPosition(mouseEvent);
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//offset to match cursor point
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cursorLocation[0] += 2;
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cursorLocation[1] += 12;
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//fill starting at the location
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fill(cursorLocation);
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}
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else if (currentTool == 'zoom' && mouseEvent.target == canvas) {
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if (mouseEvent.which == 1) changeZoom('in', getCursorPosition(mouseEvent));
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else if (mouseEvent.which == 3) changeZoom('out', getCursorPosition(mouseEvent))
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}
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dragging = false;
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currentTool = currentToolTemp;
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updateCursor();
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}, false);
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//mouse is moving on canvas
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window.addEventListener("mousemove", draw, false);
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function draw (mouseEvent) {
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var cursorLocation = getCursorPosition(mouseEvent);
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//if a document hasnt yet been created, exit this function
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if (!documentCreated || dialogueOpen) return;
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eyedropperPreview.style.display = 'none';
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if (currentTool == 'pencil') {
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//move the brush preview
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brushPreview.style.left = cursorLocation[0] + canvas.offsetLeft - brushSize * zoom / 2 + 'px';
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brushPreview.style.top = cursorLocation[1] + canvas.offsetTop - brushSize * zoom / 2 + 'px';
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//hide brush preview outside of canvas / canvas view
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if (mouseEvent.target == canvas || mouseEvent.target == canvasView)
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brushPreview.style.visibility = 'visible';
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else
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brushPreview.style.visibility = 'hidden';
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//draw line to current pixel
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if (dragging) {
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if (mouseEvent.target == canvas || mouseEvent.target == canvasView) {
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line(Math.floor(lastPos[0]/zoom),Math.floor(lastPos[1]/zoom),Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom));
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lastPos = cursorLocation;
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}
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}
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//get lightness value of color
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var selectedColor = context.getImageData(Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom),1,1).data;
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var colorLightness = Math.max(selectedColor[0],selectedColor[1],selectedColor[2])
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//for the darkest 50% of colors, change the brush preview to dark mode
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if (colorLightness>127) brushPreview.classList.remove('dark');
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else brushPreview.classList.add('dark');
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}
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else if (currentTool == 'pan' && dragging) {
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setCanvasOffset(canvas.offsetLeft + (cursorLocation[0] - lastPos[0]), canvas.offsetTop + (cursorLocation[1] - lastPos[1]))
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/*
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if (
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//right
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canvas.offsetLeft + (cursorLocation[0] - lastPos[0]) < window.innerWidth - canvasSize[0]*zoom*0.25 - 48 &&
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//left
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canvas.offsetLeft + (cursorLocation[0] - lastPos[0]) > -canvasSize[0]*zoom*0.75 + 64)
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canvas.style.left = canvas.offsetLeft + (cursorLocation[0] - lastPos[0]) +'px';
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if (
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//bottom
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canvas.offsetTop + (cursorLocation[1] - lastPos[1]) < window.innerHeight-canvasSize[1]*zoom*0.25 &&
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//top
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canvas.offsetTop + (cursorLocation[1] - lastPos[1]) > -canvasSize[0]*zoom*0.75 + 48)
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canvas.style.top = canvas.offsetTop + (cursorLocation[1] - lastPos[1]) +'px';
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*/
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}
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else if (currentTool == 'eyedropper' && dragging && mouseEvent.target == canvas) {
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var selectedColor = context.getImageData(Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom),1,1).data;
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eyedropperPreview.style.borderColor = '#'+rgbToHex(selectedColor[0],selectedColor[1],selectedColor[2]);
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eyedropperPreview.style.display = 'block';
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eyedropperPreview.style.left = cursorLocation[0] + canvas.offsetLeft - 30 + 'px';
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eyedropperPreview.style.top = cursorLocation[1] + canvas.offsetTop - 30 + 'px';
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var colorLightness = Math.max(selectedColor[0],selectedColor[1],selectedColor[2]);
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//for the darkest 50% of colors, change the eyedropper preview to dark mode
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if (colorLightness>127) eyedropperPreview.classList.remove('dark');
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else eyedropperPreview.classList.add('dark');
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}
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else if (currentTool == 'resize-brush' && dragging) {
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//get new brush size based on x distance from original clicking location
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var distanceFromClick = cursorLocation[0] - lastPos[0];
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//var roundingAmount = 20 - Math.round(distanceFromClick/10);
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//this doesnt work in reverse... because... it's not basing it off of the brush size which it should be
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var brushSizeChange = Math.round(distanceFromClick/10);
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var newBrushSize = prevBrushSize + brushSizeChange;
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//set the brush to the new size as long as its bigger than 1
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brushSize = Math.max(1,newBrushSize);
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//fix offset so the cursor stays centered
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brushPreview.style.left = lastPos[0] + canvas.offsetLeft - brushSize * zoom / 2 + 'px';
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brushPreview.style.top = lastPos[1] + canvas.offsetTop - brushSize * zoom / 2 + 'px';
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updateCursor();
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}
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}
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//mousewheel scrroll
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canvasView.addEventListener("wheel", function(mouseEvent){
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if (currentTool == 'zoom' || mouseEvent.altKey) {
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if (mouseEvent.deltaY < 0) changeZoom('in', getCursorPosition(mouseEvent));
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else if (mouseEvent.deltaY > 0) changeZoom('out', getCursorPosition(mouseEvent))
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}
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});
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