var isRectSelecting = false; let startX; let startY; let endX; let endY; /** Starts the selection: saves the canvas, sets the start coordinates * * @param {*} mouseEvent */ function startRectSelection(mouseEvent) { // Saving the canvas new HistoryStates.EditCanvas(); // Putting the vfx layer on top of everything VFXCanvas.style.zIndex = MAX_Z_INDEX; // Saving the start coords of the rect let cursorPos = getCursorPosition(mouseEvent); startX = Math.round(cursorPos[0] / zoom) - 0.5; startY = Math.round(cursorPos[1] / zoom) - 0.5; // Avoiding external selections if (startX < 0) { startX = 0; } else if (startX > currentLayer.canvas.width) { startX = currentLayer.canvas.width; } if (startY < 0) { startY = 0; } else if (startY > currentLayer.canvas.height) { startY = currentLayer.canvas.height; } // Drawing the rect drawRect(startX, startY); selectionCanceled = false; } /** Updates the selection * * @param {*} mouseEvent */ function updateRectSelection(mouseEvent) { let pos = getCursorPosition(mouseEvent); // Drawing the rect drawRect(Math.round(pos[0] / zoom) + 0.5, Math.round(pos[1] / zoom) + 0.5); } /** Ends the selection: sets the end coordiantes * * @param {*} mouseEvent */ function endRectSelection(mouseEvent) { // Getting the end position let currentPos = getCursorPosition(mouseEvent); endX = Math.round(currentPos[0] / zoom) + 0.5; endY = Math.round(currentPos[1] / zoom) + 0.5; // Inverting end and start (start must always be the top left corner) if (endX < startX) { let tmp = endX; endX = startX; startX = tmp; } // Same for the y if (endY < startY) { let tmp = endY; endY = startY; startY = tmp; } // Selecting the move tool currentTool = tool.moveselection; currentToolTemp = currentTool; // Resetting this isRectSelecting = false; // Updating the cursor currentTool.updateCursor(); } /** Cuts the selection from its canvas and puts it in the tmp layer so it can be moved * * @param {*} mousePosition */ function cutSelection(mousePosition) { // Getting the selected pixels imageDataToMove = currentLayer.context.getImageData(startX, startY, endX - startX + 1, endY - startY + 1); currentLayer.context.clearRect(startX - 0.5, startY - 0.5, endX - startX + 1, endY - startY + 1); // Moving those pixels from the current layer to the tmp layer TMPLayer.context.putImageData(imageDataToMove, startX + 1, startY); } /** Draws a dashed rectangle representing the selection * * @param {*} x Current end x coordinate of the selection * @param {*} y Current end y coordinate of the selection */ function drawRect(x, y) { // Getting the vfx context let vfxContext = VFXCanvas.getContext('2d'); // Clearing the vfx canvas vfxContext.clearRect(0, 0, VFXCanvas.width, VFXCanvas.height); vfxContext.lineWidth = 1; vfxContext.strokeStyle = 'black'; vfxContext.setLineDash([4]); // Drawing the rect vfxContext.beginPath(); vfxContext.rect(startX, startY, x - startX, y - startY); vfxContext.stroke(); } function applyChanges() { VFXCanvas.style.zIndex = MIN_Z_INDEX; } // Checks whether the pointer is inside the selected area or not function cursorInSelectedArea() { // Getting the cursor position let cursorPos = getCursorPosition(currentMouseEvent); // Getting the coordinates relatively to the canvas let x = cursorPos[0] / zoom; let y = cursorPos[1] / zoom; // This is to avoid rightX or topY being less than leftX or bottomY let leftX = Math.min(startX, endX); let rightX = Math.max(startX, endX); let topY = Math.max(startY, endY); let bottomY = Math.min(startY, endY); if (leftX <= x && x <= rightX) { if (bottomY <= y && y <= topY) { return true; } return false; } return false; } /** Moves the rect ants to the specified position * * @param {*} x X coordinate of the rect ants * @param {*} y Y coordinat of the rect ants * @param {*} width Width of the selection * @param {*} height Height of the selectin */ function moveSelection(x, y, width, height) { // Getting the vfx context let vfxContext = VFXCanvas.getContext('2d'); // Clearing the vfx canvas vfxContext.clearRect(0, 0, VFXCanvas.width, VFXCanvas.height); vfxContext.lineWidth = 1; vfxContext.setLineDash([4]); // Fixing the coordinates startX = Math.round(Math.round(x) - 0.5 - Math.round(width / 2)) + 0.5; startY = Math.round(Math.round(y) - 0.5 - Math.round(height / 2)) + 0.5; endX = startX + Math.round(width); endY = startY + Math.round(height); // Drawing the rect vfxContext.beginPath(); vfxContext.rect(startX, startY, width, height); vfxContext.stroke(); }