128 lines
3.2 KiB
JavaScript
128 lines
3.2 KiB
JavaScript
function Overlay(element)
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{
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Module.call(this);
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this.element = element;
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// Module
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this.passive = function(cmd)
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{
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this.clear();
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if(!cmd.position()){ return; }
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if(cmd.rect()){
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this.draw_rect(cmd.position(),cmd.rect());
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}
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else if(cmd.position().x > 0 && cmd.position().y > 0){
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this.draw_pointer(cmd.position());
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}
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else if(cmd.position().x > 0 ){
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this.draw_vertical_line(cmd.position());
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}
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else if(cmd.position().y > 0 ){
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this.draw_horizontal_line(cmd.position());
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}
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}
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this.active = function(cmd)
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{
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}
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this.draw_rect = function(position,rect)
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{
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this.context().beginPath();
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this.context().moveTo(position.x,position.y);
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this.context().lineTo(position.x + rect.width,position.y);
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this.context().lineTo(position.x + rect.width,position.y + rect.height);
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this.context().lineTo(position.x,position.y + rect.height);
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this.context().lineTo(position.x,position.y);
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this.context().lineCap="round";
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this.context().lineWidth = 1;
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this.context().strokeStyle = "#ff0000";
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this.context().stroke();
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this.context().closePath();
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}
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this.draw_pointer = function(position)
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{
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this.context().beginPath();
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this.context().moveTo(position.x,position.y);
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this.context().lineTo(position.x + 10,position.y);
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this.context().lineTo(position.x,position.y + 10);
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this.context().lineTo(position.x,position.y);
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this.context().lineCap="round";
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this.context().lineWidth = 1;
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this.context().strokeStyle = "#ff0000";
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this.context().stroke();
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this.context().closePath();
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}
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this.draw_vertical_line = function(position)
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{
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this.context().beginPath();
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this.context().moveTo(position.x,0);
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this.context().lineTo(position.x,this.element.height);
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this.context().lineCap="round";
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this.context().lineWidth = 1;
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this.context().strokeStyle = "#ff0000";
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this.context().stroke();
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this.context().closePath();
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}
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this.draw_horizontal_line = function(position)
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{
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this.context().beginPath();
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this.context().moveTo(position.x,0);
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this.context().lineTo(position.x,this.element.height);
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this.context().lineCap="round";
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this.context().lineWidth = 1;
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this.context().strokeStyle = "#ff0000";
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this.context().stroke();
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this.context().closePath();
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}
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this.resize = function(rect)
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{
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this.element.setAttribute('width',rect.width+"px");
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this.element.setAttribute('height',rect.height+"px");
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}
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this.show_guide = function(position,rect)
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{
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this.clear();
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this.context().beginPath();
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this.context().moveTo(0,0);
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this.context().lineTo(rect.width,0);
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this.context().lineTo(rect.width,rect.height);
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this.context().lineTo(0,rect.height);
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this.context().lineTo(0,0);
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this.context().lineCap="round";
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this.context().lineWidth = 1;
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this.context().strokeStyle = "#ff0000";
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this.context().stroke();
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this.context().closePath();
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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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this.clear = function()
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{
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this.context().clearRect(0, 0, canvas.width, canvas.height);
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}
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} |