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Be more careful with workspace thumbnail scale

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- When tweening a workspace to collapse it, round the multiplied
  height so that we don't change other workspace sizes via rounding
  differences.
- Use separate horizontal and vertical scales, so that every thumbnail
  has the same horizontal scale.

https://bugzilla.gnome.org/show_bug.cgi?id=641881
This commit is contained in:
Owen W. Taylor 2011-02-18 10:31:18 -05:00
parent bff027c1f7
commit ef983480c0
1 changed files with 8 additions and 4 deletions
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12
js/ui/workspaceThumbnail.js
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@ -714,6 +714,7 @@ ThumbnailsBox.prototype = {
let thumbnailHeight = portholeHeight * this._scale;
let thumbnailWidth = Math.round(portholeWidth * this._scale);
let roundedHScale = thumbnailWidth / portholeWidth;
let slideOffset; // X offset when thumbnail is fully slid offscreen
if (rtl)
@ -746,7 +747,7 @@ ThumbnailsBox.prototype = {
let thumbnail = this._thumbnails[i];
if (i > 0)
y += (1 - thumbnail.collapseFraction) * spacing;
y += spacing - Math.round(thumbnail.collapseFraction * spacing);
// We might end up with thumbnailHeight being something like 99.33
// pixels. To make this work and not end up with a gap at the bottom,
@ -754,7 +755,7 @@ ThumbnailsBox.prototype = {
// we compute an actual scale separately for each thumbnail.
let y1 = Math.round(y);
let y2 = Math.round(y + thumbnailHeight);
let roundedScale = (y2 - y1) / portholeHeight;
let roundedVScale = (y2 - y1) / portholeHeight;
let x1, x2;
if (rtl) {
@ -775,10 +776,13 @@ ThumbnailsBox.prototype = {
childBox.y1 = y1;
childBox.y2 = y1 + portholeHeight;
thumbnail.actor.set_scale(roundedScale, roundedScale);
thumbnail.actor.set_scale(roundedHScale, roundedVScale);
thumbnail.actor.allocate(childBox, flags);
y += thumbnailHeight * (1 - thumbnail.collapseFraction);
// We round the collapsing portion so that we don't get thumbnails resizing
// during an animation due to differences in rounded, but leave the uncollapsed
// portion unrounded so that non-animating we end up with the right total
y += thumbnailHeight - Math.round(thumbnailHeight * thumbnail.collapseFraction);
}
if (rtl) {