piskel/js/drawingtools/Move.js

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/**
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* @provide pskl.drawingtools.Move
*
* @require pskl.utils
*/
(function() {
var ns = $.namespace("pskl.drawingtools");
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ns.Move = function() {
this.toolId = "tool-move";
this.helpText = "Move tool";
// Stroke's first point coordinates (set in applyToolAt)
this.startCol = null;
this.startRow = null;
};
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pskl.utils.inherit(ns.Move, ns.BaseTool);
/**
* @override
*/
ns.Move.prototype.applyToolAt = function(col, row, color, frame, overlay) {
this.startCol = col;
this.startRow = row;
this.frameClone = frame.clone();
};
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ns.Move.prototype.moveToolAt = function(col, row, color, frame, overlay) {
var colDiff = col - this.startCol, rowDiff = row - this.startRow;
this.shiftFrame(colDiff, rowDiff, frame, this.frameClone);
};
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ns.Move.prototype.shiftFrame = function (colDiff, rowDiff, frame, reference) {
var color;
for (var col = 0 ; col < frame.getWidth() ; col++) {
for (var row = 0 ; row < frame.getHeight() ; row++) {
if (reference.containsPixel(col - colDiff, row - rowDiff)) {
color = reference.getPixel(col - colDiff, row - rowDiff);
} else {
color = Constants.TRANSPARENT_COLOR;
}
frame.setPixel(col, row, color);
}
}
};
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/**
* @override
*/
ns.Move.prototype.releaseToolAt = function(col, row, color, frame, overlay) {
this.moveToolAt(col, row, color, frame, overlay);
};
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})();