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canvas/api.nas add setClipByBoundinbox and setClipByElement function

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Henning Stahlke 2019-01-05 16:43:20 +01:00 committed by James Turner
parent 60e5e787b8
commit 28183b7575
1 changed files with 23 additions and 0 deletions
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23
Nasal/canvas/api.nas
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@ -282,6 +282,29 @@ var Element = {
return center;
},
# convert bounding box vector into clip string (yes, different order)
boundingbox2clip: func(bb) {
return sprintf("rect(%d,%d,%d,%d)", bb[1], bb[2], bb[3], bb[0])
},
# set clip by bounding box
# bounding_box: [xmin, ymin, xmax, ymax]
setClipByBoundingBox: func(bounding_box, clip_frame = nil) {
if (clip_frame == nil)
clip_frame = Element.PARENT;
me.set("clip", boundingbox2clip(bounding_box));
me.set("clip-frame", clip_frame);
return me;
},
# set clipping by bounding box of another element
setClipByElement: func(clip_elem) {
clip_elem.update();
var bounds = clip_elem.getTightBoundingBox();
me.setClipByBB(bounds, canvas.Element.PARENT);
},
# Internal Transform for convenience transform functions
_getTf: func
{