mirror of
https://github.com/lospec/pixel-editor.git
synced 2023-08-10 21:12:51 +03:00
386 lines
15 KiB
JavaScript
386 lines
15 KiB
JavaScript
var currentMouseEvent;
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// TODO: replace every position calculation with lastMousePos
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var lastMousePos;
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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
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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 = 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'))
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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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//saveHistoryState({type: 'canvas', canvas: context.getImageData(0, 0, canvasSize[0], canvasSize[1])});
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currentTool.updateCursor();
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if (canDraw) {
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draw(mouseEvent);
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}
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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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console.log('resize eraser')
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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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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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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 (!documentCreated || dialogueOpen) 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 = 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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currentGlobalColor = "#" + 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.name == 'fill' && mouseEvent.target.className == 'drawingCanvas') {
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console.log('filling')
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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.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 == 'fill' && mouseEvent.target.className == 'drawingCanvas') {
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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 == currentLayer.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.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(layers[0], 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') {
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endRectDrawing(mouseEvent);
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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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}, false);
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function setPreviewPosition(preview, cursor, size){
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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
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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
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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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function draw (mouseEvent) {
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lastMousePos = 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 = lastMousePos;
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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.name == 'pencil') {
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//move the brush preview
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brushPreview.style.left = cursorLocation[0] + currentLayer.canvas.offsetLeft - tool.pencil.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = cursorLocation[1] + currentLayer.canvas.offsetTop - tool.pencil.brushSize * zoom / 2 + 'px';
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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(lastPos[0]/zoom),Math.floor(lastPos[1]/zoom),Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom), tool.pencil.brushSize);
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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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// 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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// Uses the same preview as the brush
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//move the brush preview
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brushPreview.style.left = cursorLocation[0] + canvas.offsetLeft - currentTool.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = cursorLocation[1] + canvas.offsetTop - currentTool.brushSize * zoom / 2 + 'px';
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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(lastPos[0]/zoom),Math.floor(lastPos[1]/zoom),Math.floor(cursorLocation[0]/zoom),Math.floor(cursorLocation[1]/zoom), currentTool.brushSize);
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lastPos = cursorLocation;
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}
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}
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}
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else if (currentTool.name == 'rectangle')
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{
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//move the brush preview
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brushPreview.style.left = cursorLocation[0] + currentLayer.canvas.offsetLeft - currentTool.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = cursorLocation[1] + currentLayer.canvas.offsetTop - currentTool.brushSize * zoom / 2 + 'px';
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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 == 'pan' && dragging) {
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// Setting first layer position
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setCanvasOffset(layers[0].canvas, layers[0].canvas.offsetLeft + (cursorLocation[0] - lastPos[0]), layers[0].canvas.offsetTop + (cursorLocation[1] - lastPos[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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}
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else if (currentTool.name == 'eyedropper' && dragging && mouseEvent.target.className == 'drawingCanvas') {
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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] + 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] - 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 = 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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brushPreview.style.left = lastPos[0] + currentLayer.canvas.offsetLeft - tool.pencil.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = lastPos[1] + currentLayer.canvas.offsetTop - tool.pencil.brushSize * zoom / 2 + 'px';
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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] - 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 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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brushPreview.style.left = lastPos[0] + currentLayer.canvas.offsetLeft - tool.eraser.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = lastPos[1] + currentLayer.canvas.offsetTop - tool.eraser.brushSize * zoom / 2 + 'px';
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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] - 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 rectangleSizeChange = Math.round(distanceFromClick/10);
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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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tool.rectangle.brushSize = Math.max(1,newRectangleSize);
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//fix offset so the cursor stays centered
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brushPreview.style.left = lastPos[0] + currentLayer.canvas.offsetLeft - tool.rectangle.brushSize * zoom / 2 + 'px';
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brushPreview.style.top = lastPos[1] + currentLayer.canvas.offsetTop - tool.rectangle.brushSize * zoom / 2 + 'px';
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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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console.log("cominciata selezione su " + mouseEvent.target.className);
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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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}
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//mousewheel scrroll
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canvasView.addEventListener("wheel", function(mouseEvent){
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if (currentTool.name == 'zoom' || mouseEvent.altKey) {
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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(layers[0], 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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}
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});
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