85 lines
3.4 KiB
JavaScript
85 lines
3.4 KiB
JavaScript
class ZoomTool extends Tool {
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constructor (name, options) {
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super(name, options, undefined);
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}
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onMouseWheel(mousePos, mode) {
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super.onMouseWheel(mousePos, mode);
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// Computing current width and height
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let oldWidth = currFile.canvasSize[0] * currFile.zoom;
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let oldHeight = currFile.canvasSize[1] * currFile.zoom;
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let newWidth, newHeight;
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let prevZoom = currFile.zoom;
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let zoomed = false;
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//change zoom level
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//if you want to zoom out, and the zoom isnt already at the smallest level
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if (mode == 'out' && currFile.zoom > MIN_ZOOM_LEVEL) {
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zoomed = true;
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if (currFile.zoom > 2)
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currFile.zoom -= Math.ceil(currFile.zoom / 10);
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else
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currFile.zoom -= Math.ceil(currFile.zoom * 2 / 10) / 2;
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newWidth = currFile.canvasSize[0] * currFile.zoom;
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newHeight = currFile.canvasSize[1] * currFile.zoom;
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//adjust canvas position
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currFile.layers[0].setCanvasOffset(
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currFile.layers[0].canvas.offsetLeft + (oldWidth - newWidth) * mousePos[0]/oldWidth,
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currFile.layers[0].canvas.offsetTop + (oldHeight - newHeight) * mousePos[1]/oldHeight);
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}
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//if you want to zoom in
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else if (mode == 'in' && currFile.zoom + Math.ceil(currFile.zoom/10) < window.innerHeight/4) {
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zoomed = true;
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if (currFile.zoom > 2)
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currFile.zoom += Math.ceil(currFile.zoom/10);
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else {
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if (currFile.zoom + currFile.zoom/10 > 2) {
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currFile.zoom += Math.ceil(currFile.zoom/10);
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currFile.zoom = Math.ceil(currFile.zoom);
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}
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else {
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currFile.zoom += Math.ceil(currFile.zoom * 2 / 10) / 2;
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}
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}
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newWidth = currFile.canvasSize[0] * currFile.zoom;
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newHeight = currFile.canvasSize[1] * currFile.zoom;
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//adjust canvas position
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currFile.layers[0].setCanvasOffset(
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currFile.layers[0].canvas.offsetLeft - Math.round((newWidth - oldWidth)*mousePos[0]/oldWidth),
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currFile.layers[0].canvas.offsetTop - Math.round((newHeight - oldHeight)*mousePos[1]/oldHeight));
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}
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//resize canvas
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currFile.layers[0].resize();
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// adjust brush size
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ToolManager.currentTool().updateCursor();
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// Adjust pixel grid thickness
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if (zoomed) {
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if (currFile.zoom <= 7)
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currFile.pixelGrid.disablePixelGrid();
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else if (currFile.zoom >= 20 && mode == 'in') {
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currFile.pixelGrid.enablePixelGrid();
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currFile.pixelGrid.repaintPixelGrid((currFile.zoom - prevZoom) * 0.6);
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}
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else if (prevZoom >= 20 && mode == 'out') {
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currFile.pixelGrid.enablePixelGrid();
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currFile.pixelGrid.repaintPixelGrid((currFile.zoom - prevZoom) * 0.6);
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}
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else {
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currFile.pixelGrid.enablePixelGrid();
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}
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}
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for (let i=0; i<currFile.layers.length; i++) {
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currFile.layers[i].copyData(currFile.layers[0]);
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}
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for (let i=0; i<currFile.sublayers.length; i++) {
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currFile.sublayers[i].copyData(currFile.layers[0]);
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}
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}
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} |