66 lines
1.5 KiB
JavaScript
66 lines
1.5 KiB
JavaScript
function Layer(name)
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{
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this.name = name;
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this.element = document.createElement("canvas");
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this.element.setAttribute("id","_"+name);
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this.element.setAttribute("class","layer");
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this.resize = function(rect)
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{
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console.log("Resize "+this.name+" to "+rect.render());
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var pixels_rect = new Rect(this.element.width+"x"+this.element.height);
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this.element.width = rect.width * 2;
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this.element.height = rect.height * 2;
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this.element.style.width = rect.width+"px";
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this.element.style.height = rect.height+"px";
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this.context().scale(2,2);
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}
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this.clear = function()
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{
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this.context().clearRect(0, 0, this.element.width, this.element.height);
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}
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this.context = function()
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{
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return this.element.getContext('2d');
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}
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//
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this.widget_cursor = function()
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{
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return "Move";
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}
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this.move_from = null;
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this.mouse_down = function(position)
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{
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this.move_from = ronin.position_in_window(position);
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}
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this.mouse_move = function(position)
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{
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if(this.move_from === null){ return; }
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position = ronin.position_in_window(position);
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var offset_x = this.move_from.x - position.x;
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var offset_y = this.move_from.y - position.y;
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this.context().globalCompositeOperation = "copy";
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this.context().drawImage(this.context().canvas, -offset_x, -offset_y);
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this.context().globalCompositeOperation = "source-over";
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this.move_from = new Position(position.x,position.y);
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}
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this.mouse_up = function(event)
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{
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this.move_from = null;
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}
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} |