piskel/js/drawingtools/Rectangle.js
2012-09-14 23:43:49 +02:00

59 lines
1.5 KiB
JavaScript

/*
* @provide pskl.drawingtools.Rectangle
*
* @require pskl.utils
*/
(function() {
var ns = $.namespace("pskl.drawingtools");
ns.Rectangle = function() {
this.toolId = "tool-rectangle"
// Rectangle's first point coordinates (set in applyToolAt)
this.startCol = null;
this.startRow = null;
};
pskl.utils.inherit(ns.Rectangle, ns.BaseTool);
/**
* @override
*/
ns.Rectangle.prototype.applyToolAt = function(col, row, color, frame, overlay) {
this.startCol = col;
this.startRow = row;
// Drawing the first point of the rectangle in the fake overlay canvas:
overlay.setPixel(col, row, color);
};
ns.Rectangle.prototype.moveToolAt = function(col, row, color, frame, overlay) {
overlay.clear();
if(color == Constants.TRANSPARENT_COLOR) {
color = Constants.SELECTION_TRANSPARENT_COLOR;
}
// draw in overlay
this.drawRectangle_(col, row, color, overlay);
};
/**
* @override
*/
ns.Rectangle.prototype.releaseToolAt = function(col, row, color, frame, overlay) {
overlay.clear();
if(frame.containsPixel(col, row)) { // cancel if outside of canvas
// draw in frame to finalize
this.drawRectangle_(col, row, color, frame);
}
};
ns.Rectangle.prototype.drawRectangle_ = function (col, row, color, targetFrame) {
var strokePoints = pskl.PixelUtils.getBoundRectanglePixels(this.startCol, this.startRow, col, row);
for(var i = 0; i< strokePoints.length; i++) {
// Change model:
targetFrame.setPixel(strokePoints[i].col, strokePoints[i].row, color);
}
};
})();