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gopprof: fix bug: do not rotate 180 degrees for large scrolls

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R=r
CC=golang-dev
https://golang.org/cl/4273088
This commit is contained in:
Russ Cox 2011-03-22 02:04:59 -04:00
parent d4b19bdbed
commit 1da382c871
1 changed files with 10 additions and 0 deletions
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10
src/cmd/prof/gopprof
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@ -1896,6 +1896,7 @@ sub SvgJavascript {
// SVGPan
// http://www.cyberz.org/blog/2009/12/08/svgpan-a-javascript-svg-panzoomdrag-library/
// Local modification: if(true || ...) below to force panning, never moving.
// Local modification: add clamping to fix bug in handleMouseWheel.
/**
* SVGPan library 1.2
@ -2038,6 +2039,15 @@ function handleMouseWheel(evt) {
var z = 1 + delta; // Zoom factor: 0.9/1.1
// Clamp to reasonable values.
// The 0.1 check is important because
// a very large scroll can turn into a
// negative z, which rotates the image 180 degrees.
if(z < 0.1)
z = 0.1;
if(z > 10.0)
z = 10.0;
var g = svgDoc.getElementById("viewport");
var p = getEventPoint(evt);