piskel/js/controller/DrawingController.js

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(function () {
var ns = $.namespace("pskl.controller");
ns.DrawingController = function (framesheet, container, dpi) {
// TODO(vincz): Store user prefs in a localstorage string ?
var renderingOptions = {
"dpi": dpi,
"hasGrid" : true
};
/**
* @public
*/
this.framesheet = framesheet;
/**
* @public
*/
this.overlayFrame = pskl.model.Frame.createEmptyFromFrame(framesheet.getCurrentFrame());
/**
* @private
*/
this.container = container;
this.renderer = new pskl.rendering.FrameRenderer(this.container, renderingOptions, "drawing-canvas");
this.overlayRenderer = new pskl.rendering.FrameRenderer(this.container, renderingOptions, "canvas-overlay");
this.renderer.init(framesheet.getCurrentFrame());
this.overlayRenderer.init(this.overlayFrame);
// State of drawing controller:
this.isClicked = false;
this.isRightClicked = false;
this.previousMousemoveTime = 0;
this.currentToolBehavior = null;
this.primaryColor = Constants.DEFAULT_PEN_COLOR;
this.secondaryColor = Constants.TRANSPARENT_COLOR;
this.initMouseBehavior();
$.subscribe(Events.TOOL_SELECTED, $.proxy(function(evt, toolBehavior) {
console.log("Tool selected: ", toolBehavior);
this.currentToolBehavior = toolBehavior;
}, this));
$.subscribe(Events.COLOR_SELECTED, $.proxy(function(evt, color, isPrimary) {
console.log("Color selected: ", color);
if (isPrimary) {
this.primaryColor = color;
} else {
this.secondaryColor = color;
}
}, this));
};
ns.DrawingController.prototype.initMouseBehavior = function() {
var body = $('body');
this.container.mousedown($.proxy(this.onMousedown_, this));
this.container.mousemove($.proxy(this.onMousemove_, this));
body.mouseup($.proxy(this.onMouseup_, this));
// Deactivate right click:
body.contextmenu(this.onCanvasContextMenu_);
};
/**
* @private
*/
ns.DrawingController.prototype.onMousedown_ = function (event) {
this.isClicked = true;
if(event.button == 2) { // right click
this.isRightClicked = true;
$.publish(Events.CANVAS_RIGHT_CLICKED);
}
var coords = this.getSpriteCoordinates(event);
this.currentToolBehavior.applyToolAt(
coords.col, coords.row,
this.getCurrentColor_(),
this.framesheet.getCurrentFrame(),
this.overlayFrame
);
$.publish(Events.LOCALSTORAGE_REQUEST);
};
/**
* @private
*/
ns.DrawingController.prototype.onMousemove_ = function (event) {
var currentTime = new Date().getTime();
// Throttling of the mousemove event:
if ((currentTime - this.previousMousemoveTime) > 40 ) {
var coords = this.getSpriteCoordinates(event);
if (this.isClicked) {
this.currentToolBehavior.moveToolAt(
coords.col, coords.row,
this.getCurrentColor_(),
this.framesheet.getCurrentFrame(),
this.overlayFrame
);
// TODO(vincz): Find a way to move that to the model instead of being at the interaction level.
// Eg when drawing, it may make sense to have it here. However for a non drawing tool,
// you don't need to draw anything when mousemoving and you request useless localStorage.
$.publish(Events.LOCALSTORAGE_REQUEST);
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} else {
this.currentToolBehavior.moveUnactiveToolAt(
coords.col, coords.row,
this.getCurrentColor_(),
this.framesheet.getCurrentFrame(),
this.overlayFrame
);
}
this.previousMousemoveTime = currentTime;
}
};
/**
* @private
*/
ns.DrawingController.prototype.onMouseup_ = function (event) {
if(this.isClicked || this.isRightClicked) {
// A mouse button was clicked on the drawing canvas before this mouseup event,
// the user was probably drawing on the canvas.
// Note: The mousemove movement (and the mouseup) may end up outside
// of the drawing canvas.
this.isClicked = false;
this.isRightClicked = false;
var coords = this.getSpriteCoordinates(event);
//console.log("mousemove: col: " + spriteCoordinate.col + " - row: " + spriteCoordinate.row);
this.currentToolBehavior.releaseToolAt(
coords.col, coords.row,
this.getCurrentColor_(),
this.framesheet.getCurrentFrame(),
this.overlayFrame
);
$.publish(Events.TOOL_RELEASED);
}
},
/**
* @private
*/
ns.DrawingController.prototype.getRelativeCoordinates = function (clientX, clientY) {
var canvasPageOffset = this.container.offset();
return {
x : clientX - canvasPageOffset.left,
y : clientY - canvasPageOffset.top
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};
};
/**
* @private
*/
ns.DrawingController.prototype.getSpriteCoordinates = function(event) {
var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
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return this.renderer.convertPixelCoordinatesIntoSpriteCoordinate(coords);
};
/**
* @private
*/
ns.DrawingController.prototype.getCurrentColor_ = function () {
if(this.isRightClicked) {
return this.secondaryColor;
} else {
return this.primaryColor;
}
};
/**
* @private
*/
ns.DrawingController.prototype.onCanvasContextMenu_ = function (event) {
event.preventDefault();
event.stopPropagation();
event.cancelBubble = true;
return false;
};
ns.DrawingController.prototype.updateDPI = function (newDPI) {
this.renderer.updateDPI(newDPI);
this.overlayRenderer.updateDPI(newDPI);
this.forceRendering_();
};
ns.DrawingController.prototype.render = function () {
this.renderFrame();
this.renderOverlay();
};
ns.DrawingController.prototype.renderFrame = function () {
var frame = this.framesheet.getCurrentFrame();
var serializedFrame = frame.serialize();
if (this.serializedFrame != serializedFrame) {
this.serializedFrame = serializedFrame;
this.renderer.render(frame);
}
};
ns.DrawingController.prototype.renderOverlay = function () {
var serializedOverlay = this.overlayFrame.serialize();
if (this.serializedOverlay != serializedOverlay) {
this.serializedOverlay = serializedOverlay;
this.overlayRenderer.render(this.overlayFrame);
}
};
ns.DrawingController.prototype.forceRendering_ = function () {
this.serializedFrame = this.serializedOverlay = null;
}
})();