147 lines
3.6 KiB
JavaScript
147 lines
3.6 KiB
JavaScript
function Overlay(element)
|
|
{
|
|
Module.call(this);
|
|
|
|
this.element = element;
|
|
|
|
// Module
|
|
|
|
this.passive = function(cmd)
|
|
{
|
|
this.draw(cmd.position(),cmd.rect());
|
|
}
|
|
|
|
this.active = function(cmd)
|
|
{
|
|
if(cmd.bang()){ this.guides = []; }
|
|
}
|
|
|
|
this.hint = function(cmd)
|
|
{
|
|
if(cmd.bang()){ return "Overlay: Erase all guides"; }
|
|
|
|
var hint_position = (cmd.position() ? "Position "+cmd.position().x+","+cmd.position().y+" " : "");
|
|
var hint_rect = (cmd.rect() ? "Size "+cmd.rect().width+"px by "+cmd.rect().height+"px " : "");
|
|
|
|
return "Overlay: "+hint_position+hint_rect;
|
|
}
|
|
|
|
// draw
|
|
|
|
this.draw = function(position,rect)
|
|
{
|
|
this.clear();
|
|
|
|
if(!position){ return; }
|
|
|
|
if(rect){
|
|
this.draw_rect(position,rect);
|
|
}
|
|
else if(position.x != 0 && position.y != 0){
|
|
this.draw_pointer(position);
|
|
}
|
|
else if(position.x != 0 ){
|
|
this.draw_vertical_line(position);
|
|
}
|
|
else if(position.y != 0 ){
|
|
this.draw_horizontal_line(position);
|
|
}
|
|
}
|
|
|
|
this.draw_rect = function(position,rect)
|
|
{
|
|
this.context().beginPath();
|
|
|
|
position.normalize(rect);
|
|
|
|
this.context().moveTo(position.x,position.y);
|
|
this.context().lineTo(position.x + rect.width,position.y);
|
|
this.context().lineTo(position.x + rect.width,position.y + rect.height);
|
|
this.context().lineTo(position.x,position.y + rect.height);
|
|
this.context().lineTo(position.x,position.y);
|
|
|
|
this.context().lineCap="round";
|
|
this.context().lineWidth = 1;
|
|
this.context().strokeStyle = "#ff0000";
|
|
this.context().stroke();
|
|
this.context().closePath();
|
|
}
|
|
|
|
this.draw_pointer = function(position)
|
|
{
|
|
this.context().beginPath();
|
|
|
|
this.context().moveTo(position.x,position.y);
|
|
this.context().lineTo(position.x + 10,position.y);
|
|
this.context().lineTo(position.x,position.y + 10);
|
|
this.context().lineTo(position.x,position.y);
|
|
|
|
this.context().lineCap="round";
|
|
this.context().lineWidth = 1;
|
|
this.context().strokeStyle = "#ff0000";
|
|
this.context().stroke();
|
|
this.context().closePath();
|
|
}
|
|
|
|
this.draw_vertical_line = function(position)
|
|
{
|
|
this.context().beginPath();
|
|
|
|
this.context().moveTo(position.x,0);
|
|
this.context().lineTo(position.x,this.element.height);
|
|
|
|
this.context().lineCap="round";
|
|
this.context().lineWidth = 1;
|
|
this.context().strokeStyle = "#ff0000";
|
|
this.context().stroke();
|
|
this.context().closePath();
|
|
}
|
|
|
|
this.draw_horizontal_line = function(position)
|
|
{
|
|
this.context().beginPath();
|
|
|
|
this.context().moveTo(position.x,0);
|
|
this.context().lineTo(position.x,this.element.height);
|
|
|
|
this.context().lineCap="round";
|
|
this.context().lineWidth = 1;
|
|
this.context().strokeStyle = "#ff0000";
|
|
this.context().stroke();
|
|
this.context().closePath();
|
|
}
|
|
|
|
this.resize = function(rect)
|
|
{
|
|
this.element.setAttribute('width',rect.width+"px");
|
|
this.element.setAttribute('height',rect.height+"px");
|
|
}
|
|
|
|
this.show_guide = function(position,rect)
|
|
{
|
|
this.clear();
|
|
this.context().beginPath();
|
|
|
|
this.context().moveTo(0,0);
|
|
this.context().lineTo(rect.width,0);
|
|
this.context().lineTo(rect.width,rect.height);
|
|
this.context().lineTo(0,rect.height);
|
|
this.context().lineTo(0,0);
|
|
|
|
this.context().lineCap="round";
|
|
this.context().lineWidth = 1;
|
|
this.context().strokeStyle = "#ff0000";
|
|
this.context().stroke();
|
|
this.context().closePath();
|
|
}
|
|
|
|
this.context = function()
|
|
{
|
|
return this.element.getContext('2d');
|
|
}
|
|
|
|
this.clear = function()
|
|
{
|
|
this.context().clearRect(0, 0, canvas.width, canvas.height);
|
|
}
|
|
} |