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Added clearing of existing shapes during resize.

This commit is contained in:
Lewis Hemens 2014-01-18 00:41:38 +00:00
parent 24be421d5e
commit 0270156786
1 changed files with 32 additions and 0 deletions
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32
js-lib/state-controller.js
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@ -25,6 +25,30 @@ function drawLine(state, startPosition, endPosition, clockwise) {
state.drawSpecial(new ascii.Vector(vX, hY));
};
/**
* Clears a line but with some special cases.
* TODO: Refactor somewhere!
*/
function clearLine(state, startPosition, endPosition, clockwise) {
var hX1 = Math.min(startPosition.x, endPosition.x);
var vY1 = Math.min(startPosition.y, endPosition.y);
var hX2 = Math.max(startPosition.x, endPosition.x);
var vY2 = Math.max(startPosition.y, endPosition.y);
var hY = clockwise ? startPosition.y : endPosition.y;
var vX = clockwise ? endPosition.x : startPosition.x;
while (hX1++ < hX2) {
state.drawValue(new ascii.Vector(hX1, hY), ' ');
}
while (vY1++ < vY2) {
state.drawValue(new ascii.Vector(vX, vY1), ' ');
}
state.drawValue(startPosition, ' ');
state.drawValue(endPosition, ' ');
state.drawValue(new ascii.Vector(vX, hY), ' ');
};
/**
* Common interface for different drawing functions, e.g. box, line, etc.
* @interface
@ -160,6 +184,14 @@ DrawMove.prototype.start = function(position) {
}
}
this.ends = ends;
// Clear all the lines so we can draw them afresh.
for (var i in ends) {
clearLine(this.state, position, ends[i].position, ends[i].clockwise);
}
this.state.commitDraw();
// Redraw the new lines after we have cleared the existing ones.
this.move(position);
};
DrawMove.prototype.move = function(position) {