get native gtk widgets in sidebars working

Change-Id: If65aef1249f54a87d7854c3fa2db4319a24a5a05
Reviewed-on: https://gerrit.libreoffice.org/85326
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

3 files changed, 57 insertions, 8 deletions

diff --git a/vcl/inc/unx/gtk/gtkframe.hxx b/vcl/inc/unx/gtk/gtkframe.hxx
index 0955a1d92dc9..033ee93efe42 100644
--- a/vcl/inc/unx/gtk/gtkframe.hxx
+++ b/vcl/inc/unx/gtk/gtkframe.hxx
@@ -162,6 +162,8 @@ class GtkSalFrame final : public SalFrame
     };
     friend struct IMHandler;
 
+    friend class GtkSalObjectWidgetClip;
+
     SalX11Screen                    m_nXScreen;
     GtkWidget*                      m_pWindow;
     GtkHeaderBar*                   m_pHeaderBar;
diff --git a/vcl/inc/unx/gtk/gtkinst.hxx b/vcl/inc/unx/gtk/gtkinst.hxx
index 1e0f86cf2cf2..d1d624b9e27e 100644
--- a/vcl/inc/unx/gtk/gtkinst.hxx
+++ b/vcl/inc/unx/gtk/gtkinst.hxx
@@ -236,6 +236,7 @@ public:
     virtual css::uno::Reference< css::uno::XInterface > CreateDropTarget() override;
     virtual OpenGLContext* CreateOpenGLContext() override;
     virtual weld::Builder* CreateBuilder(weld::Widget* pParent, const OUString& rUIRoot, const OUString& rUIFile) override;
+    virtual weld::Builder* CreateInterimBuilder(vcl::Window* pParent, const OUString& rUIRoot, const OUString& rUIFile) override;
     virtual weld::MessageDialog* CreateMessageDialog(weld::Widget* pParent, VclMessageType eMessageType, VclButtonsType eButtonType, const OUString &rPrimaryMessage) override;
     virtual weld::Window* GetFrameWeld(const css::uno::Reference<css::awt::XWindow>& rWindow) override;
 
diff --git a/vcl/inc/unx/gtk/gtkobject.hxx b/vcl/inc/unx/gtk/gtkobject.hxx
index 7ff9e499815b..d1a5226cd9cc 100644
--- a/vcl/inc/unx/gtk/gtkobject.hxx
+++ b/vcl/inc/unx/gtk/gtkobject.hxx
@@ -25,37 +25,83 @@
 #include <salobj.hxx>
 #include <unx/gtk/gtkframe.hxx>
 
-class GtkSalObject final : public SalObject
+class GtkSalObjectBase : public SalObject
 {
-    SystemEnvData     m_aSystemData;
+protected:
+    SystemEnvData       m_aSystemData;
     GtkWidget*          m_pSocket;
     GtkSalFrame*        m_pParent;
     cairo_region_t*     m_pRegion;
 
+    void Init();
+
+public:
+    GtkSalObjectBase(GtkSalFrame* pParent);
+    virtual ~GtkSalObjectBase() override;
+
+    virtual void                    BeginSetClipRegion( sal_uInt32 nRects ) override;
+    virtual void                    UnionClipRegion( long nX, long nY, long nWidth, long nHeight ) override;
+
+    virtual void                    SetForwardKey( bool bEnable ) override;
+
+    virtual const SystemEnvData*    GetSystemData() const override;
+
+    virtual Size                    GetOptimalSize() const override;
+
+private:
     // signals
     static gboolean     signalButton( GtkWidget*, GdkEventButton*, gpointer );
     static gboolean     signalFocus( GtkWidget*, GdkEventFocus*, gpointer );
+};
+
+// this attempts to clip the hosted native window using gdk_window_shape_combine_region
+class GtkSalObject final : public GtkSalObjectBase
+{
+    // signals
     static void         signalDestroy( GtkWidget*, gpointer );
+
 public:
-    GtkSalObject( GtkSalFrame* pParent, bool bShow );
+    GtkSalObject(GtkSalFrame* pParent, bool bShow);
     virtual ~GtkSalObject() override;
 
     // override all pure virtual methods
     virtual void                    ResetClipRegion() override;
-    virtual void                    BeginSetClipRegion( sal_uInt32 nRects ) override;
-    virtual void                    UnionClipRegion( long nX, long nY, long nWidth, long nHeight ) override;
     virtual void                    EndSetClipRegion() override;
 
     virtual void                    SetPosSize( long nX, long nY, long nWidth, long nHeight ) override;
     virtual void                    Show( bool bVisible ) override;
+    virtual void                    Reparent(SalFrame* pFrame) override;
+};
 
-    virtual void                    SetForwardKey( bool bEnable ) override;
+// this attempts to clip the hosted native GtkWidget by using a GtkScrolledWindow as a viewport
+// only a rectangular area is going to work
+class GtkSalObjectWidgetClip final : public GtkSalObjectBase
+{
+    tools::Rectangle m_aRect;
+    tools::Rectangle m_aClipRect;
+    GtkWidget* m_pScrolledWindow;
 
-    virtual const SystemEnvData*    GetSystemData() const override;
+    // signals
+    static gboolean     signalScroll( GtkWidget*, GdkEvent*, gpointer );
+    static void         signalDestroy( GtkWidget*, gpointer );
 
-    virtual Size                    GetOptimalSize() const override;
+    bool signal_scroll(GtkWidget* pScrolledWindow, GdkEvent* pEvent);
+
+    void ApplyClipRegion();
+public:
+    GtkSalObjectWidgetClip(GtkSalFrame* pParent, bool bShow);
+    virtual ~GtkSalObjectWidgetClip() override;
+
+    // override all pure virtual methods
+    virtual void                    ResetClipRegion() override;
+    virtual void                    EndSetClipRegion() override;
+
+    virtual void                    SetPosSize( long nX, long nY, long nWidth, long nHeight ) override;
+    virtual void                    Show( bool bVisible ) override;
+    virtual void                    Reparent(SalFrame* pFrame) override;
 };
 
+
 #endif // INCLUDED_VCL_INC_UNX_GTK_GTKOBJECT_HXX
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */