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Merge pull request #385 from smiegrin/master

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Introduces zooming towards/away from mouse
This commit is contained in:
Julian Descottes 2016-07-28 09:39:18 +02:00 committed by GitHub
commit 3e7999cfc5
1 changed files with 17 additions and 14 deletions
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31
src/js/controller/DrawingController.js
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@ -64,8 +64,8 @@
var shortcuts = pskl.service.keyboard.Shortcuts;
pskl.app.shortcutService.registerShortcut(shortcuts.MISC.RESET_ZOOM, this.resetZoom_.bind(this));
pskl.app.shortcutService.registerShortcut(shortcuts.MISC.INCREASE_ZOOM, this.increaseZoom_.bind(this, 1));
pskl.app.shortcutService.registerShortcut(shortcuts.MISC.DECREASE_ZOOM, this.decreaseZoom_.bind(this, 1));
pskl.app.shortcutService.registerShortcut(shortcuts.MISC.INCREASE_ZOOM, this.updateZoom_.bind(this, 1));
pskl.app.shortcutService.registerShortcut(shortcuts.MISC.DECREASE_ZOOM, this.updateZoom_.bind(this, -1));
window.setTimeout(function () {
this.afterWindowResize_();
@ -245,7 +245,7 @@
} else if (pskl.utils.UserAgent.isFirefox) {
delta = -40 * evt.deltaY;
}
var modifier = Math.abs(delta / 120);
var modifier = (delta / 120);
if (pskl.utils.UserAgent.isMac ? evt.metaKey : evt.ctrlKey) {
modifier = modifier * 5;
@ -253,21 +253,24 @@
evt.preventDefault();
}
if (delta > 0) {
this.increaseZoom_(modifier);
} else if (delta < 0) {
this.decreaseZoom_(modifier);
}
this.updateZoom_(modifier);
};
ns.DrawingController.prototype.increaseZoom_ = function (zoomMultiplier) {
ns.DrawingController.prototype.updateZoom_ = function (zoomMultiplier) {
var coords = this.getSpriteCoordinates(this._clientX,this._clientY);
var off = this.getOffset();
var oldWidth = this.getContainerWidth_() / this.renderer.getZoom();
var oldHeight = this.getContainerHeight_() / this.renderer.getZoom();
var xRatio = (coords.x - off.x) / oldWidth;
var yRatio = (coords.y - off.y) / oldHeight;
var step = (zoomMultiplier || 1) * this.getZoomStep_();
this.setZoom_(this.renderer.getZoom() + step);
};
ns.DrawingController.prototype.decreaseZoom_ = function (zoomMultiplier) {
var step = (zoomMultiplier || 1) * this.getZoomStep_();
this.setZoom_(this.renderer.getZoom() - step);
var newWidth = this.getContainerWidth_() / this.renderer.getZoom();
var newHeight = this.getContainerHeight_() / this.renderer.getZoom();
this.setOffset(
off.x - ((newWidth - oldWidth) * xRatio),
off.y - ((newHeight - oldHeight) * yRatio)
);
};
/**