tdf#118065 Fix slow Impress custom animation sidebar update

Timer MainSequence::maTimer dropped from 500ms to 50ms.
Reorder declarations of UI elements in CustomAnimationPane.hxx
to be more intuitive and reflect order shown in UI.

Change-Id: I2857dbbd6a4131c4ca6f9a054132f34056e95338
Reviewed-on: https://gerrit.libreoffice.org/61019
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sd/source/core/CustomAnimationEffect.cxx

@@ -2969,7 +2969,7 @@ void MainSequence::init()
     mnSequenceType = EffectNodeType::MAIN_SEQUENCE;
 
     maTimer.SetInvokeHandler( LINK(this, MainSequence, onTimerHdl) );
-    maTimer.SetTimeout(500);
+    maTimer.SetTimeout(50);
 
     mxChangesListener.set( new AnimationChangeListener( this ) );
 
@@ -3356,7 +3356,7 @@ IMPL_LINK_NOARG(MainSequence, onTimerHdl, Timer *, void)
     }
 }
 
-/** starts a timer that recreates the internal structure from the API core after 1 second */
+/** starts a timer that recreates the internal structure from the API core */
 void MainSequence::startRecreateTimer()
 {
     if( !mbRebuilding && (mbIgnoreChanges == 0) )
@@ -3366,7 +3366,10 @@ void MainSequence::startRecreateTimer()
     }
 }
 
-/** starts a timer that rebuilds the API core from the internal structure after 1 second */
+/**
+ * starts a timer that rebuilds the API core from the internal structure
+ * This is used to reduce the number of screen redraws due to animation changes.
+*/
 void MainSequence::startRebuildTimer()
 {
     mbTimerMode = true;

sd/source/ui/animations/CustomAnimationPane.hxx

@@ -136,28 +136,29 @@ private:
 
     const CustomAnimationPresets* mpCustomAnimationPresets;
 
-    VclPtr<PushButton> mpPBAddEffect;
-    VclPtr<PushButton> mpPBRemoveEffect;
-    VclPtr<FixedText>  mpFTEffect;
-    VclPtr<FixedText>  mpFTStart;
-    VclPtr<ListBox>    mpLBStart;
-    VclPtr<FixedText>  mpFTProperty;
-    VclPtr<VclHBox>    mpPlaceholderBox;
-    VclPtr<PropertyControl>    mpLBProperty;
-    VclPtr<PushButton> mpPBPropertyMore;
-    VclPtr<FixedText>  mpFTDuration;
+    // UI Elements
+    VclPtr<FixedText>   mpFTAnimation;
+    VclPtr<CustomAnimationList> mpCustomAnimationList;
+    VclPtr<PushButton>  mpPBAddEffect;
+    VclPtr<PushButton>  mpPBRemoveEffect;
+    VclPtr<PushButton>  mpPBMoveUp;
+    VclPtr<PushButton>  mpPBMoveDown;
+    VclPtr<FixedText>   mpFTCategory;
+    VclPtr<ListBox>     mpLBCategory;
+    VclPtr<FixedText>   mpFTEffect;
+    VclPtr<CategoryListBox> mpLBAnimation;
+    VclPtr<FixedText>   mpFTStart;
+    VclPtr<ListBox>     mpLBStart;
+    VclPtr<FixedText>   mpFTProperty;
+    VclPtr<PropertyControl> mpLBProperty;
+    VclPtr<VclHBox>     mpPlaceholderBox;
+    VclPtr<PushButton>  mpPBPropertyMore;
+    VclPtr<FixedText>   mpFTDuration;
     VclPtr<MetricBox>   mpCBXDuration;
     VclPtr<FixedText>   mpFTStartDelay;
     VclPtr<MetricField> mpMFStartDelay;
-    VclPtr<CustomAnimationList>    mpCustomAnimationList;
-    VclPtr<PushButton> mpPBMoveUp;
-    VclPtr<PushButton> mpPBMoveDown;
-    VclPtr<PushButton> mpPBPlay;
-    VclPtr<CheckBox>   mpCBAutoPreview;
-    VclPtr<FixedText> mpFTCategory;
-    VclPtr<ListBox>    mpLBCategory;
-    VclPtr<FixedText> mpFTAnimation;
-    VclPtr<CategoryListBox> mpLBAnimation;
+    VclPtr<CheckBox>    mpCBAutoPreview;
+    VclPtr<PushButton>  mpPBPlay;
 
     OUString    maStrModify;
     OUString    maStrProperty;