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Fix : zoom step depends on mousewheel event delta value

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This commit is contained in:
jdescottes 2014-05-18 16:33:01 +02:00
parent 0fec4eff4a
commit f1b6ea4ae3
1 changed files with 13 additions and 18 deletions
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23
src/js/controller/DrawingController.js
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@ -1,7 +1,6 @@
(function () {
var ns = $.namespace("pskl.controller");
var MOUSEWHEEL_THROTTLING = 20;
ns.DrawingController = function (piskelController, paletteController, container) {
/**
@ -46,8 +45,6 @@
this.previousMousemoveTime = 0;
this.currentToolBehavior = null;
this.lastMouseWheel_ = 0;
// State of clicked button (need to be stateful here, see comment in getCurrentColor_)
this.currentMouseButton_ = Constants.LEFT_BUTTON;
};
@ -172,12 +169,14 @@
this.setZoom_(this.calculateZoom_());
};
ns.DrawingController.prototype.increaseZoom_ = function () {
this.setZoom_(this.renderer.getZoom() + this.getZoomStep_());
ns.DrawingController.prototype.increaseZoom_ = function (zoomMultiplier) {
var step = (zoomMultiplier || 1) * this.getZoomStep_();
this.setZoom_(this.renderer.getZoom() + step);
};
ns.DrawingController.prototype.decreaseZoom_ = function () {
this.setZoom_(this.renderer.getZoom() - this.getZoomStep_());
ns.DrawingController.prototype.decreaseZoom_ = function (zoomMultiplier) {
var step = (zoomMultiplier || 1) * this.getZoomStep_();
this.setZoom_(this.renderer.getZoom() - step);
};
ns.DrawingController.prototype.getZoomStep_ = function () {
@ -226,17 +225,13 @@
};
ns.DrawingController.prototype.onMousewheel_ = function (jQueryEvent) {
var now = Date.now();
if (now - this.lastMouseWheel_ > MOUSEWHEEL_THROTTLING) {
this.lastMouseWheel_ = now;
var event = jQueryEvent.originalEvent;
var delta = event.wheelDeltaY || (-2 * event.deltaY);
var modifier = Math.abs(delta/120);
if (delta > 0) {
this.increaseZoom_();
this.increaseZoom_(modifier);
} else if (delta < 0) {
this.decreaseZoom_();
}
this.decreaseZoom_(modifier);
}
};