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Avoid a load of repeat operations when panning by greater than viewport size.

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This commit is contained in:
Michael Drake 2012-07-26 19:00:38 +01:00
parent d9d7dcb758
commit 305938bb48
1 changed files with 4 additions and 2 deletions
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6
framebuffer/gui.c
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@ -202,8 +202,8 @@ fb_pan(fbtk_widget_t *widget,
y = fbtk_get_absy(widget);
/* if the pan exceeds the viewport size just redraw the whole area */
if (bwidget->pany > height || bwidget->pany < -height ||
bwidget->panx > width || bwidget->panx < -width) {
if (bwidget->pany >= height || bwidget->pany <= -height ||
bwidget->panx >= width || bwidget->panx <= -width) {
bwidget->scrolly += bwidget->pany;
bwidget->scrollx += bwidget->panx;
@ -212,6 +212,8 @@ fb_pan(fbtk_widget_t *widget,
/* ensure we don't try to scroll again */
bwidget->panx = 0;
bwidget->pany = 0;
bwidget->pan_required = false;
return;
}
if (bwidget->pany < 0) {