151 lines
4.1 KiB
JavaScript
151 lines
4.1 KiB
JavaScript
var isRectSelecting = false;
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let startX;
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let startY;
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let endX;
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let endY;
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function startRectSelection(mouseEvent) {
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// Saving the canvas
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new HistoryStateEditCanvas();
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// Putting the vfx layer on top of everything
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VFXCanvas.style.zIndex = MAX_Z_INDEX;
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// Saving the start coords of the rect
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let cursorPos = getCursorPosition(mouseEvent);
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startX = Math.round(cursorPos[0] / zoom) - 0.5;
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startY = Math.round(cursorPos[1] / zoom) - 0.5;
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// Avoiding external selections
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if (startX < 0) {
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startX = 0;
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}
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else if (startX > currentLayer.canvas.width) {
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startX = currentLayer.canvas.width;
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}
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if (startY < 0) {
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startY = 0;
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}
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else if (startY > currentLayer.canvas.height) {
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startY = currentLayer.canvas.height;
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}
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// Drawing the rect
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drawRect(startX, startY);
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selectionCanceled = false;
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}
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function updateRectSelection(mouseEvent) {
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let pos = getCursorPosition(mouseEvent);
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// Drawing the rect
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drawRect(Math.round(pos[0] / zoom) + 0.5, Math.round(pos[1] / zoom) + 0.5);
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}
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function endRectSelection(mouseEvent) {
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// Getting the end position
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let currentPos = getCursorPosition(mouseEvent);
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endX = Math.round(currentPos[0] / zoom) + 0.5;
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endY = Math.round(currentPos[1] / zoom) + 0.5;
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// Inverting end and start (start must always be the top left corner)
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if (endX < startX) {
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let tmp = endX;
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endX = startX;
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startX = tmp;
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}
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// Same for the y
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if (endY < startY) {
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let tmp = endY;
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endY = startY;
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startY = tmp;
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}
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// Selecting the move tool
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currentTool = 'moveselection';
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currentToolTemp = currentTool;
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// Resetting this
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isRectSelecting = false;
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// Updating the cursor
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updateCursor();
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}
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function cutSelection(mouseEvent) {
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console.log('Coordinate: start x, y: ' + startX + ', ' + startY + ' end x, y: ' + endX + ', ' + endY);
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// Getting the selected pixels
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imageDataToMove = currentLayer.context.getImageData(startX, startY, endX - startX + 1, endY - startY + 1);
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currentLayer.context.clearRect(startX - 0.5, startY - 0.5, endX - startX + 1, endY - startY + 1);
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// Moving those pixels from the current layer to the tmp layer
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TMPLayer.context.putImageData(imageDataToMove, startX + 1, startY);
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//originalDataPosition = [currentPos[0], currentPos[1]];
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}
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function drawRect(x, y) {
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// Getting the vfx context
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let vfxContext = VFXCanvas.getContext('2d');
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// Clearing the vfx canvas
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vfxContext.clearRect(0, 0, VFXCanvas.width, VFXCanvas.height);
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vfxContext.lineWidth = 1;
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vfxContext.strokeStyle = 'black';
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vfxContext.setLineDash([4]);
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// Drawing the rect
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vfxContext.beginPath();
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vfxContext.rect(startX, startY, x - startX, y - startY);
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vfxContext.stroke();
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// TODO: make the rect blink from black to white in case of dark backgrounds
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}
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function applyChanges() {
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VFXCanvas.style.zIndex = MIN_Z_INDEX;
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}
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// Checks whether the pointer is inside the selected area or not
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function cursorInSelectedArea() {
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let cursorPos = getCursorPosition(currentMouseEvent);
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let x = cursorPos[0] / zoom;
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let y = cursorPos[1] / zoom;
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let leftX = Math.min(startX, endX);
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let rightX = Math.max(startX, endX);
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let topY = Math.max(startY, endY);
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let bottomY = Math.min(startY, endY);
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if (leftX <= x && x <= rightX) {
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if (bottomY <= y && y <= topY) {
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return true;
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}
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return false;
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}
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return false;
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}
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function moveSelection(x, y, width, height) {
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// Getting the vfx context
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let vfxContext = VFXCanvas.getContext('2d');
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// Clearing the vfx canvas
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vfxContext.clearRect(0, 0, VFXCanvas.width, VFXCanvas.height);
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vfxContext.lineWidth = 1;
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vfxContext.setLineDash([4]);
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startX = Math.round(Math.round(x) - Math.round(width / 2)) + 0.5;
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startY = Math.round(Math.round(y) - Math.round(height / 2)) + 0.5;
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endX = startX + Math.round(width);
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endY = startY + Math.round(height);
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// Drawing the rect
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vfxContext.beginPath();
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vfxContext.rect(startX, startY, width, height);
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vfxContext.stroke();
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} |