453 lines
16 KiB
JavaScript
453 lines
16 KiB
JavaScript
var currentMouseEvent;
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var lastMouseMovePos;
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//mousedown - start drawing
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window.addEventListener("mousedown", function (mouseEvent) {
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// Saving the event in case something else needs it
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currentMouseEvent = mouseEvent;
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canDraw = true;
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//if no document has been created yet, or this is a dialog open, or the currentLayer is locked
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if (!documentCreated || dialogueOpen || currentLayer.isLocked || !currentLayer.isVisible) 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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lastMouseClickPos = 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 = tool.pan;
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else if (mouseEvent.altKey)
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currentTool = tool.eyedropper;
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else if (mouseEvent.target.className == 'drawingCanvas' &&
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(currentTool.name == 'pencil' || currentTool.name == 'eraser' || currentTool.name == 'rectangle' || currentTool.name == 'ellipse' || currentTool.name === 'line'))
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new HistoryStateEditCanvas();
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else if (currentTool.name == 'moveselection') {
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if (!cursorInSelectedArea() &&
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((mouseEvent.target.id == 'canvas-view') || mouseEvent.target.className == 'drawingCanvas')) {
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tool.pencil.switchTo();
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canDraw = false;
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}
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}
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if (!currentLayer.isLocked && !currentLayer.isVisible && canDraw) {
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draw(mouseEvent);
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}
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}
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else if (mouseEvent.which == 2) {
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tool.pan.brushSize = currentTool.brushSize;
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currentTool = tool.pan;
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}
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else if (currentTool.name == 'pencil' && mouseEvent.which == 3) {
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currentTool = tool.resizebrush;
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tool.pencil.previousBrushSize = tool.pencil.brushSize;
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}
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else if (currentTool.name == 'eraser' && mouseEvent.which == 3) {
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currentTool = tool.resizeeraser;
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tool.eraser.previousBrushSize = tool.eraser.brushSize;
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}
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// TODO: [ELLIPSE] Do we need similar logic related to ellipse?
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else if (currentTool.name == 'rectangle' && mouseEvent.which == 3) {
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currentTool = tool.resizerectangle;
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tool.rectangle.previousBrushSize = tool.rectangle.brushSize;
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}
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else if (currentTool.name == 'line' && mouseEvent.which == 3) {
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currentTool = tool.resizeline;
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tool.line.previousBrushSize = tool.line.brushSize;
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}
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if (currentTool.name == 'eyedropper' && mouseEvent.target.className == 'drawingCanvas')
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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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// Saving the event in case something else needs it
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currentMouseEvent = mouseEvent;
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closeMenu();
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if (currentLayer != null && !isChildOfByClass(mouseEvent.target, "layers-menu-entry")) {
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currentLayer.closeOptionsMenu();
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}
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// If the user finished placing down a line, clear the tmp canvas and copy the data to the current layer
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if (currentTool.name === "line") {
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const tmpCanvas = document.getElementById('tmp-canvas');
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currentLayer.context.drawImage(tmpCanvas, 0, 0);
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const tmpContext = tmpCanvas.getContext('2d');
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tmpContext.clearRect(0, 0, tmpCanvas.width, tmpCanvas.height);
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}
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if (!documentCreated || dialogueOpen || !currentLayer.isVisible || currentLayer.isLocked) return;
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if (currentTool.name == 'eyedropper' && mouseEvent.target.className == 'drawingCanvas') {
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var cursorLocation = getCursorPosition(mouseEvent);
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var selectedColor = getEyedropperColor(cursorLocation);
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var newColor = rgbToHex(selectedColor[0],selectedColor[1],selectedColor[2]);
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currentGlobalColor = "#" + newColor;
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for (let i=1; i<layers.length - 1; i++) {
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layers[i].context.fillStyle = currentGlobalColor;
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}
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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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//if picked color matches this color
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if (newColor == colors[i].jscolor.toString()) {
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//remove current color selection
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document.querySelector("#colors-menu li.selected")?.classList.remove("selected");
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//set current color
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for (let i=2; i<layers.length; i++) {
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layers[i].context.fillStyle = '#' + newColor;
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}
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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.name == 'fill' && mouseEvent.target.className == 'drawingCanvas') {
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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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currentLayer.updateLayerPreview();
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}
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else if (currentTool.name == 'zoom' && mouseEvent.target.className == 'drawingCanvas') {
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let mode;
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if (mouseEvent.which == 1){
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mode = "in";
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}
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}
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else if (currentTool == 'zoom' && mouseEvent.target.className == 'drawingCanvas') {
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let mode;
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if (mouseEvent.which == 1){
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mode = 'in';
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}
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else if (mouseEvent.which == 3){
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mode = 'out';
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}
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changeZoom(mode, getCursorPosition(mouseEvent));
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for (let i=1; i<layers.length; i++) {
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layers[i].copyData(layers[0]);
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}
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}
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else if (currentTool.name == 'rectselect' && isRectSelecting) {
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endRectSelection(mouseEvent);
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}
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else if (currentTool.name == 'rectangle' && isDrawingRect) {
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endRectDrawing(mouseEvent);
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currentLayer.updateLayerPreview();
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}
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else if (currentTool.name == 'ellipse' && isDrawingEllipse) {
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endEllipseDrawing(mouseEvent);
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currentLayer.updateLayerPreview();
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}
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dragging = false;
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currentTool = currentToolTemp;
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currentTool.updateCursor();
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var cursorLocation = getCursorPosition(mouseEvent);
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currentTool.moveBrushPreview(cursorLocation);
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}, false);
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function setPreviewPosition(preview, size){
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let toAdd = 0;
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// This prevents the brush to be placed in the middle of pixels
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if (size % 2 == 0) {
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toAdd = 0.5;
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}
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preview.style.left = (
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currentLayer.canvas.offsetLeft
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+ Math.floor(cursor[0]/zoom) * zoom
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- Math.floor(size / 2) * zoom + toAdd
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) + 'px';
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preview.style.top = (
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currentLayer.canvas.offsetTop
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+ Math.floor(cursor[1]/zoom) * zoom
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- Math.floor(size / 2) * zoom + toAdd
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) + 'px';
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}
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// OPTIMIZABLE: redundant || mouseEvent.target.className in currentTool ifs
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//mouse is moving on canvas
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window.addEventListener("mousemove", draw, false);
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window.addEventListener("mousedown", draw, false);
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function draw (mouseEvent) {
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if (!dialogueOpen)
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{
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lastMouseMovePos = getCursorPosition(mouseEvent);
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// Saving the event in case something else needs it
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currentMouseEvent = mouseEvent;
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var cursorLocation = lastMouseMovePos;
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//if a document hasnt yet been created or the current layer is locked, exit this function
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if (!documentCreated || dialogueOpen || !currentLayer.isVisible || currentLayer.isLocked) return;
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// Hiding eyedropper, will be shown if it's needed
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eyedropperPreview.style.display = 'none';
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if (currentTool.name == 'pencil') {
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//hide brush preview outside of canvas / canvas view
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if (mouseEvent.target.className == 'drawingCanvas'|| mouseEvent.target.className == 'drawingCanvas')
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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.className == 'drawingCanvas' || mouseEvent.target.className == 'drawingCanvas') {
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line(Math.floor(lastMouseClickPos[0]/zoom),
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Math.floor(lastMouseClickPos[1]/zoom),
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Math.floor(cursorLocation[0]/zoom),
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Math.floor(cursorLocation[1]/zoom),
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tool.pencil.brushSize
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);
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lastMouseClickPos = cursorLocation;
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}
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}
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//get lightness value of color
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var selectedColor = currentLayer.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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currentLayer.updateLayerPreview();
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}
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// Decided to write a different implementation in case of differences between the brush and the eraser tool
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else if (currentTool.name == 'eraser') {
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//hide brush preview outside of canvas / canvas view
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if (mouseEvent.target.className == 'drawingCanvas' || mouseEvent.target.className == 'drawingCanvas')
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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.className == 'drawingCanvas' || mouseEvent.target.className == 'drawingCanvas') {
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line(Math.floor(lastMouseClickPos[0]/zoom),Math.floor(lastMouseClickPos[1]/zoom),Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom), currentTool.brushSize);
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lastMouseClickPos = cursorLocation;
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}
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}
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currentLayer.updateLayerPreview();
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}
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else if (currentTool.name == 'rectangle')
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{
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//hide brush preview outside of canvas / canvas view
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if (mouseEvent.target.className == 'drawingCanvas'|| mouseEvent.target.className == 'drawingCanvas')
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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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if (!isDrawingRect && dragging) {
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startRectDrawing(mouseEvent);
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}
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else if (dragging){
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updateRectDrawing(mouseEvent);
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}
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}
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else if (currentTool.name == 'ellipse')
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{
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//hide brush preview outside of canvas / canvas view
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if (mouseEvent.target.className == 'drawingCanvas'|| mouseEvent.target.className == 'drawingCanvas')
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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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if (!isDrawingEllipse && dragging) {
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startEllipseDrawing(mouseEvent);
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}
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else if (dragging){
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updateEllipseDrawing(mouseEvent);
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}
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}
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else if (currentTool.name == 'pan' && dragging) {
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// Setting first layer position
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layers[0].setCanvasOffset(layers[0].canvas.offsetLeft + (cursorLocation[0] - lastMouseClickPos[0]), layers[0].canvas.offsetTop + (cursorLocation[1] - lastMouseClickPos[1]));
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// Copying that position to the other layers
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for (let i=1; i<layers.length; i++) {
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layers[i].copyData(layers[0]);
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}
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// Updating cursorLocation with new layer position
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lastMouseMovePos = getCursorPosition(mouseEvent);
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cursorLocation = lastMouseMovePos;
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}
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else if (currentTool.name == 'eyedropper' && dragging && mouseEvent.target.className == 'drawingCanvas') {
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let selectedColor = getEyedropperColor(cursorLocation);
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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] + currentLayer.canvas.offsetLeft - 30 + 'px';
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eyedropperPreview.style.top = cursorLocation[1] + currentLayer.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.name == 'resizebrush' && 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] - lastMouseClickPos[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 = tool.pencil.previousBrushSize + brushSizeChange;
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//set the brush to the new size as long as its bigger than 1
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tool.pencil.brushSize = Math.max(1,newBrushSize);
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//fix offset so the cursor stays centered
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tool.pencil.moveBrushPreview(lastMouseClickPos);
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currentTool.updateCursor();
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}
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else if (currentTool.name == 'resizeeraser' && 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] - lastMouseClickPos[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 eraserSizeChange = Math.round(distanceFromClick/10);
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var newEraserSizeChange = tool.eraser.previousBrushSize + eraserSizeChange;
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//set the brush to the new size as long as its bigger than 1
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tool.eraser.brushSize = Math.max(1,newEraserSizeChange);
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//fix offset so the cursor stays centered
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tool.eraser.moveBrushPreview(lastMouseClickPos);
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currentTool.updateCursor();
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}
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else if (currentTool.name == 'resizerectangle' && 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] - lastMouseClickPos[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 rectangleSizeChange = Math.round(distanceFromClick/10);
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// TODO: [ELLIPSE] Do we need similar logic related to ellipse?
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var newRectangleSize = tool.rectangle.previousBrushSize + rectangleSizeChange;
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//set the brush to the new size as long as its bigger than 1
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// TODO: [ELLIPSE] Do we need similar logic related to ellipse?
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tool.rectangle.brushSize = Math.max(1,newRectangleSize);
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//fix offset so the cursor stays centered
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// TODO: [ELLIPSE] Do we need similar logic related to ellipse?
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tool.rectangle.moveBrushPreview(lastMouseClickPos);
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currentTool.updateCursor();
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}
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else if (currentTool.name == 'resizeline' && 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] - lastMouseClickPos[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 lineSizeChange = Math.round(distanceFromClick/10);
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var newLineSize = tool.line.previousBrushSize + lineSizeChange;
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//set the brush to the new size as long as its bigger than 1
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tool.line.brushSize = Math.max(1, newLineSize);
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//fix offset so the cursor stays centered
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tool.line.moveBrushPreview(lastMouseClickPos);
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currentTool.updateCursor();
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}
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else if (currentTool.name == 'rectselect') {
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if (dragging && !isRectSelecting && mouseEvent.target.className == 'drawingCanvas') {
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isRectSelecting = true;
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startRectSelection(mouseEvent);
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}
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else if (dragging && isRectSelecting) {
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updateRectSelection(mouseEvent);
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}
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else if (isRectSelecting) {
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endRectSelection();
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}
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}
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else if (currentTool.name == 'moveselection') {
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// Updating the cursor (move if inside rect, cross if not)
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currentTool.updateCursor();
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// If I'm dragging, I move the preview
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if (dragging && cursorInSelectedArea()) {
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updateMovePreview(getCursorPosition(mouseEvent));
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}
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}
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else if (currentTool.name === "line") {
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if (mouseEvent.target.className == 'drawingCanvas'|| mouseEvent.target.className == 'drawingCanvas') {
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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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}
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if (dragging) {
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if (mouseEvent.target.className == 'drawingCanvas' || mouseEvent.target.className == 'drawingCanvas') {
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diagLine(lastMouseClickPos, zoom, cursorLocation);
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}
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}
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currentLayer.updateLayerPreview();
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}
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// Moving brush preview
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currentTool.moveBrushPreview(cursorLocation);
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}
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if (mouseEvent.target.className == 'drawingCanvas')
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currentTool.updateCursor();
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else
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canvasView.style.cursor = 'default';
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console.log("Cursor: " + canvasView.style.cursor);
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}
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//mousewheel scroll
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canvasView.addEventListener("wheel", function(mouseEvent){
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let mode;
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if (mouseEvent.deltaY < 0){
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mode = 'in';
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}
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else if (mouseEvent.deltaY > 0) {
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mode = 'out';
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}
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// Changing zoom and position of the first layer
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changeZoom(mode, getCursorPosition(mouseEvent));
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for (let i=1; i<layers.length; i++) {
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// Copying first layer's data into the other layers
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layers[i].copyData(layers[0]);
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}
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}); |