FReply SScrubWidget::OnMouseButtonUp( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
bool bHandleLeftMouseButton = MouseEvent.GetEffectingButton() == EKeys::LeftMouseButton && this->HasMouseCapture();
bool bHandleRightMouseButton = MouseEvent.GetEffectingButton() == EKeys::RightMouseButton && this->HasMouseCapture() && bAllowZoom;
if ( bHandleRightMouseButton )
{
bPanning = false;
FTrackScaleInfo TimeScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetLastScreenSpacePosition());
float NewValue = TimeScaleInfo.LocalXToInput(CursorPos.X);
if( !bMouseMovedDuringPanning )
{
CreateContextMenu(NewValue, MouseEvent);
}
return FReply::Handled().ReleaseMouseCapture();
}
else if ( bHandleLeftMouseButton )
{
if(DraggingBar)
{
DraggingBar = false;
}
else if( bDragging )
{
OnEndSliderMovement.ExecuteIfBound( ValueAttribute.Get() );
}
else
{
FTrackScaleInfo TimeScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetLastScreenSpacePosition());
float NewValue = TimeScaleInfo.LocalXToInput(CursorPos.X);
CommitValue( NewValue, true, false );
}
bDragging = false;
return FReply::Handled().ReleaseMouseCapture();
}
return FReply::Unhandled();
}
/** This function is used by a few random widgets and is mostly arbitrary. It could be moved anywhere. */
int32 SScrubWidget::GetDivider(float InputMinX, float InputMaxX, FVector2D WidgetSize, float SequenceLength, int32 NumFrames)
{
FTrackScaleInfo TimeScaleInfo(InputMinX, InputMaxX, 0.f, 0.f, WidgetSize);
float TimePerKey = (NumFrames > 0) ? SequenceLength / (float)(NumFrames) : 0.0f;
float TotalWidgetWidth = TimeScaleInfo.WidgetSize.X;
float NumKeys = TimeScaleInfo.ViewInputRange / TimePerKey;
float KeyWidgetWidth = TotalWidgetWidth / NumKeys;
int32 Divider = 1;
if (KeyWidgetWidth > 0)
{
Divider = FMath::Max<int32>(50 / KeyWidgetWidth, 1);
}
return Divider;
}
/** This function is used by a few random widgets and is mostly arbitrary. It could be moved anywhere. */
int32 SScrubWidget::GetDivider(float InputMinX, float InputMaxX, FVector2D WidgetSize, float SequenceLength, int32 NumFrames)
{
FTrackScaleInfo TimeScaleInfo(InputMinX, InputMaxX, 0.f, 0.f, WidgetSize);
const FAnimKeyHelper Helper(SequenceLength, NumFrames);
float TimePerKey = Helper.TimePerKey();
float TotalWidgetWidth = TimeScaleInfo.WidgetSize.X;
int32 NumKeys = TimeScaleInfo.ViewInputRange / TimePerKey;
float KeyWidgetWidth = TotalWidgetWidth / (float)Helper.GetNumKeys();
int32 Divider = 1;
if (KeyWidgetWidth > 0)
{
Divider = FMath::Max<int32>(50 / KeyWidgetWidth, 1);
}
return Divider;
}
FReply SScrubWidget::OnMouseMove( const FGeometry& MyGeometry, const FPointerEvent& MouseEvent )
{
// Bar Dragging
if(DraggingBar)
{
// Update bar if we are dragging
FVector2D CursorPos = MyGeometry.AbsoluteToLocal( MouseEvent.GetScreenSpacePosition() );
FTrackScaleInfo ScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
float NewDataPos = FMath::Clamp( ScaleInfo.LocalXToInput(CursorPos.X), ViewInputMin.Get(), ViewInputMax.Get() );
OnBarDrag.ExecuteIfBound(DraggableBarIndex, NewDataPos);
}
else
{
// Update what bar we are hovering over
FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetScreenSpacePosition());
FTrackScaleInfo ScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
DraggableBarIndex = INDEX_NONE;
if ( DraggableBars.IsBound() )
{
const TArray<float>& DraggableBarsVal = DraggableBars.Get();
for ( int32 I=0; I < DraggableBarsVal.Num(); I++ )
{
if( FMath::Abs( ScaleInfo.InputToLocalX(DraggableBarsVal[I]) - CursorPos.X ) < 10 )
{
DraggableBarIndex = I;
break;
}
}
}
}
if ( this->HasMouseCapture() )
{
if (MouseEvent.IsMouseButtonDown( EKeys::RightMouseButton ) && bPanning)
{
FTrackScaleInfo ScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
FVector2D ScreenDelta = MouseEvent.GetCursorDelta();
float InputDeltaX = ScreenDelta.X/ScaleInfo.PixelsPerInput;
bMouseMovedDuringPanning |= !ScreenDelta.IsNearlyZero(0.001f);
float NewViewInputMin = ViewInputMin.Get() - InputDeltaX;
float NewViewInputMax = ViewInputMax.Get() - InputDeltaX;
// we'd like to keep the range if outside when panning
if ( NewViewInputMin < 0.f )
{
NewViewInputMin = 0.f;
NewViewInputMax = ScaleInfo.ViewInputRange;
}
else if ( NewViewInputMax > SequenceLength.Get() )
{
NewViewInputMax = SequenceLength.Get();
NewViewInputMin = NewViewInputMax - ScaleInfo.ViewInputRange;
}
OnSetInputViewRange.ExecuteIfBound(NewViewInputMin, NewViewInputMax);
}
else if (!bDragging)
{
DistanceDragged += FMath::Abs(MouseEvent.GetCursorDelta().X);
if ( DistanceDragged > FSlateApplication::Get().GetDragTriggerDistance() )
{
bDragging = true;
}
if( bDragging )
{
OnBeginSliderMovement.ExecuteIfBound();
}
}
else if (bDragging)
{
FTrackScaleInfo TimeScaleInfo(ViewInputMin.Get(), ViewInputMax.Get(), 0.f, 0.f, MyGeometry.Size);
FVector2D CursorPos = MyGeometry.AbsoluteToLocal(MouseEvent.GetLastScreenSpacePosition());
float NewValue = TimeScaleInfo.LocalXToInput(CursorPos.X);
CommitValue( NewValue, true, false );
}
return FReply::Handled();
}
return FReply::Unhandled();
}
