improve SalInstanceWidget::draw

Change-Id: I9acb8dfceee586b343feb184e0788491d66d24a5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110427
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

3 files changed, 46 insertions, 12 deletions

diff --git a/include/vcl/window.hxx b/include/vcl/window.hxx
index 4decec615469..d2129d2b0163 100644
--- a/include/vcl/window.hxx
+++ b/include/vcl/window.hxx
@@ -432,6 +432,7 @@ class FloatingWindow;
 class GroupBox;
 class PushButton;
 class RadioButton;
+class SalInstanceWidget;
 class SystemChildWindow;
 class ImplDockingWindowWrapper;
 class ImplPopupFloatWin;
@@ -493,6 +494,7 @@ class VCL_DLLPUBLIC Window : public ::OutputDevice
     friend class ::GroupBox;
     friend class ::PushButton;
     friend class ::RadioButton;
+    friend class ::SalInstanceWidget;
     friend class ::SystemChildWindow;
     friend class ::ImplBorderWindow;
     friend class ::PaintHelper;
diff --git a/vcl/inc/salvtables.hxx b/vcl/inc/salvtables.hxx
index 6f3fccc87005..8f431002359d 100644
--- a/vcl/inc/salvtables.hxx
+++ b/vcl/inc/salvtables.hxx
@@ -174,6 +174,8 @@ private:
     DECL_LINK(MouseEventListener, VclSimpleEvent&, void);
     DECL_LINK(MnemonicActivateHdl, vcl::Window&, bool);
 
+    static void DoRecursivePaint(vcl::Window* pWindow, const Point& rPos, OutputDevice& rOutput);
+
     const bool m_bTakeOwnership;
     bool m_bEventListener;
     bool m_bKeyEventListener;
diff --git a/vcl/source/app/salvtables.cxx b/vcl/source/app/salvtables.cxx
index c1ac2432ff7c..f983237dafed 100644
--- a/vcl/source/app/salvtables.cxx
+++ b/vcl/source/app/salvtables.cxx
@@ -1172,39 +1172,69 @@ std::unique_ptr<weld::Container> SalInstanceWidget::weld_parent() const
     return std::make_unique<SalInstanceContainer>(pParent, m_pBuilder, false);
 }
 
-namespace
-{
-void DoRecursivePaint(vcl::Window* pWindow, const Point& rPos, OutputDevice& rOutput)
+void SalInstanceWidget::DoRecursivePaint(vcl::Window* pWindow, const Point& rRenderLogicPos,
+                                         OutputDevice& rOutput)
 {
-    Size aSize = pWindow->GetSizePixel();
+    pWindow->Push();
+    bool bOldMapModeEnabled = pWindow->IsMapModeEnabled();
+
+    if (pWindow->GetMapMode().GetMapUnit() != rOutput.GetMapMode().GetMapUnit())
+    {
+        // This is needed for e.g. the scrollbar in writer comments in margins that has its map unit in pixels
+        // as seen with bin/run gtktiledviewer --enable-tiled-annotations on a document containing a comment
+        // long enough to need a scrollbar
+        pWindow->EnableMapMode();
+        MapMode aMapMode = pWindow->GetMapMode();
+        aMapMode.SetMapUnit(rOutput.GetMapMode().GetMapUnit());
+        aMapMode.SetScaleX(rOutput.GetMapMode().GetScaleX());
+        aMapMode.SetScaleY(rOutput.GetMapMode().GetScaleY());
+        pWindow->SetMapMode(aMapMode);
+    }
 
     VclPtr<VirtualDevice> xOutput(VclPtr<VirtualDevice>::Create(DeviceFormat::DEFAULT));
-    xOutput->SetOutputSizePixel(aSize);
-    xOutput->DrawOutDev(Point(), aSize, rPos, aSize, rOutput);
+    Size aChildSizePixel(pWindow->GetSizePixel());
+    xOutput->SetOutputSizePixel(aChildSizePixel);
 
-    //set ReallyVisible to match Visible, we restore the original
-    //state after Paint
+    MapMode aMapMode(xOutput->GetMapMode());
+    aMapMode.SetMapUnit(rOutput.GetMapMode().GetMapUnit());
+    aMapMode.SetScaleX(rOutput.GetMapMode().GetScaleX());
+    aMapMode.SetScaleY(rOutput.GetMapMode().GetScaleY());
+    xOutput->SetMapMode(aMapMode);
+
+    Size aTempLogicSize(xOutput->PixelToLogic(aChildSizePixel));
+    Size aRenderLogicSize(rOutput.PixelToLogic(aChildSizePixel));
+
+    xOutput->DrawOutDev(Point(), aTempLogicSize, rRenderLogicPos, aRenderLogicSize, rOutput);
+
+    //set ReallyVisible to match Visible, we restore the original state after Paint
     WindowImpl* pImpl = pWindow->ImplGetWindowImpl();
     bool bRVisible = pImpl->mbReallyVisible;
     pImpl->mbReallyVisible = pWindow->IsVisible();
 
-    pWindow->Paint(*xOutput, tools::Rectangle(Point(), pWindow->PixelToLogic(aSize)));
+    pWindow->ApplySettings(*xOutput);
+    pWindow->Paint(*xOutput, tools::Rectangle(Point(), pWindow->PixelToLogic(aChildSizePixel)));
 
     pImpl->mbReallyVisible = bRVisible;
 
-    rOutput.DrawOutDev(rPos, aSize, Point(), aSize, *xOutput);
+    rOutput.DrawOutDev(rRenderLogicPos, aRenderLogicSize, Point(), aTempLogicSize, *xOutput);
 
     xOutput.disposeAndClear();
 
+    pWindow->EnableMapMode(bOldMapModeEnabled);
+    pWindow->Pop();
+
     for (vcl::Window* pChild = pWindow->GetWindow(GetWindowType::FirstChild); pChild;
          pChild = pChild->GetWindow(GetWindowType::Next))
     {
         if (!pChild->IsVisible())
             continue;
-        DoRecursivePaint(pChild, rPos + rOutput.PixelToLogic(pChild->GetPosPixel()), rOutput);
+        Point aRelPos(pChild->GetPosPixel());
+        Size aRelLogicOffset(rOutput.PixelToLogic(Size(aRelPos.X(), aRelPos.Y())));
+        DoRecursivePaint(pChild,
+                         rRenderLogicPos + Point(aRelLogicOffset.Width(), aRelLogicOffset.Height()),
+                         rOutput);
     }
 }
-}
 
 void SalInstanceWidget::draw(OutputDevice& rOutput, const Point& rPos, const Size& rSizePixel)
 {