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author | Fred Ross-Perry <fred.ross-perry@artifex.com> | 2016-09-27 08:16:24 -0700 |
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committer | Fred Ross-Perry <fred.ross-perry@artifex.com> | 2016-11-15 12:31:08 -0800 |
commit | 3512a02e11b3f80c3b5fe6af8639e510e1382568 (patch) | |
tree | 31955277e8c0ab73a335a76dbc08cea3c02481de /platform/android/example | |
parent | d11ed8c4d7816cfe40181178c2150c8056d388f9 (diff) | |
download | mupdf-3512a02e11b3f80c3b5fe6af8639e510e1382568.tar.xz |
Android example - fix to maintain vertical center when zooming.
Diffstat (limited to 'platform/android/example')
-rwxr-xr-x | platform/android/example/mupdf/src/main/java/com/artifex/mupdf/android/DocViewBase.java | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/platform/android/example/mupdf/src/main/java/com/artifex/mupdf/android/DocViewBase.java b/platform/android/example/mupdf/src/main/java/com/artifex/mupdf/android/DocViewBase.java index 5ecc75d8..10cf78ca 100755 --- a/platform/android/example/mupdf/src/main/java/com/artifex/mupdf/android/DocViewBase.java +++ b/platform/android/example/mupdf/src/main/java/com/artifex/mupdf/android/DocViewBase.java @@ -477,9 +477,14 @@ public class DocViewBase mScale *= ratio; scaleChildren(); - // scroll so the left edged is flush to the viewport. + // scroll horizontally so the left edge is flush with the viewport. mXScroll += getScrollX(); + // scroll vertically to maintain the center. + int oldy = mViewport.centerY() - mLastBlockRect.top; + int newy = (int) ((float) oldy * ratio); + mYScroll -= (newy-oldy); + requestLayout(); } |