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From b179235f702e474b115ca479b603052f422346fd Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
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Date: Wed, 7 May 2014 16:16:17 +0100
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Subject: [PATCH] center slide after changing zoom
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Change-Id: I08698b06d0485d2cd3573af665e0621b42d37349
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---
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sd/source/ui/inc/ViewShell.hxx | 1 +
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sd/source/ui/view/viewshe2.cxx | 27 +++++++++++++++++++++++++++
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sd/source/ui/view/viewshel.cxx | 1 +
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3 files changed, 29 insertions(+)
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diff --git a/sd/source/ui/inc/ViewShell.hxx b/sd/source/ui/inc/ViewShell.hxx
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index ce5ea31..87edbc5 100644
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--- a/sd/source/ui/inc/ViewShell.hxx
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+++ b/sd/source/ui/inc/ViewShell.hxx
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@@ -206,6 +206,7 @@ public:
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virtual void UpdateScrollBars (void);
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void Scroll(long nX, long nY);
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void ScrollLines(long nX, long nY);
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+ void ScrollCenter();
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virtual void SetZoom(long nZoom);
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virtual void SetZoomRect(const Rectangle& rZoomRect);
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void InitWindows(const Point& rViewOrigin, const Size& rViewSize,
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diff --git a/sd/source/ui/view/viewshe2.cxx b/sd/source/ui/view/viewshe2.cxx
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index 5f98d68..8f91d6c 100644
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--- a/sd/source/ui/view/viewshe2.cxx
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+++ b/sd/source/ui/view/viewshe2.cxx
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@@ -365,6 +365,33 @@ void ViewShell::SetZoom(long nZoom)
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UpdateScrollBars();
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}
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+namespace
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+{
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+ void CenterScrollBar(ScrollBar *pBar)
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+ {
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+ long nVisSize = pBar->GetVisibleSize();
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+ long nMin = pBar->GetRangeMin();
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+ long nMax = pBar->GetRangeMax();
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+ long nLen = nMax - nMin - nVisSize;
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+ long nPos = nMin + nLen/2;
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+ pBar->DoScroll(nPos);
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+ }
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+}
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+
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+void ViewShell::ScrollCenter()
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+{
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+ if (mpHorizontalScrollBar.get() != NULL)
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+ CenterScrollBar(mpHorizontalScrollBar.get());
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+
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+ //zoom mode with no panning of the current slide, i.e. the
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+ //scrollbar is in change slide mode not pan slide mode
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+ if (IsPageFlipMode())
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+ return;
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+
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+ if (mpVerticalScrollBar.get() != NULL)
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+ CenterScrollBar(mpVerticalScrollBar.get());
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+}
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+
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/**
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* Set zoom rectangle for active window. Sets all split windows to the same zoom
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* factor.
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diff --git a/sd/source/ui/view/viewshel.cxx b/sd/source/ui/view/viewshel.cxx
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index 28e272e..17bcf5f 100644
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--- a/sd/source/ui/view/viewshel.cxx
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+++ b/sd/source/ui/view/viewshel.cxx
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@@ -683,6 +683,7 @@ bool ViewShell::HandleScrollCommand(const CommandEvent& rCEvt, ::sd::Window* pWi
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nNewZoom = std::min( (long) pWin->GetMaxZoom(), basegfx::zoomtools::zoomIn( nOldZoom ));
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SetZoom( nNewZoom );
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+ ScrollCenter(); //center slide after changing zoom
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Invalidate( SID_ATTR_ZOOM );
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Invalidate( SID_ATTR_ZOOMSLIDER );
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--
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1.9.0
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