Drawing Mouse Select Range on HTML5 Canvas Doesn't Clear


Drawing Mouse Select Range on HTML5 Canvas Doesn't Clear



On mouse down I am storing the mouse starting x,y and then calculating the mouse selection range to draw a rectangle displaying the selection box. This works great, however until I release the mouse button I see every rectangle drawn for the mouse selection. Where am I going wrong?


this.drawRange = function() {
var c = engine.game_screen;
var top_left = [mouse.start_x, mouse.start_y];
var top_right = [mouse.start_x + mouse.range_width, mouse.start_y];
var bottom_left = [mouse.start_x, mouse.start_y + mouse.range_height];
var bottom_right = [mouse.start_x + mouse.range_width, mouse.start_y + mouse.range_height];
c.beginPath;
c.moveTo(top_left[0], top_left[1]);
c.lineTo(top_right[0], top_right[1]);
c.lineTo(bottom_right[0], bottom_right[1]);
c.lineTo(bottom_left[0], bottom_left[1]);
c.lineTo(top_left[0], top_left[1]);
c.stroke();
}

engine.draw = function() {
engine.game_screen.clearRect(0, 0, engine.settings.screen_width, engine.settings.screen_height);
engine.game_states[engine.game_states.length - 1].draw();
if(engine.mouse.left_click_down) {
engine.mouse.drawRange();
}
}



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