custom widgets: setup style setting in the widget library

Some theme colors are set using the style settings, which are
implemented by each backend to correspond to the system theme.
For custom widgets these need to also be set by the library
itself. This commit adds the ground work and sets some of the
colors for windows backgrounds.

Change-Id: Ia65b1605b2b7bef7f01ff1feff2e7470479e626a

5 files changed, 32 insertions, 1 deletions

diff --git a/vcl/inc/WidgetDrawInterface.hxx b/vcl/inc/WidgetDrawInterface.hxx
index ce6c5d43babe..4d1ecce7a3fe 100644
--- a/vcl/inc/WidgetDrawInterface.hxx
+++ b/vcl/inc/WidgetDrawInterface.hxx
@@ -12,6 +12,8 @@
 #define INCLUDED_VCL_INC_WIDGETDRAWINTERFACE_HXX
 
 #include <vcl/dllapi.h>
+#include <vcl/salnativewidgets.hxx>
+#include <vcl/settings.hxx>
 
 namespace vcl
 {
@@ -91,6 +93,8 @@ public:
                                         tools::Rectangle& rNativeBoundingRegion,
                                         tools::Rectangle& rNativeContentRegion)
         = 0;
+
+    virtual bool updateSettings(AllSettings& rSettings) = 0;
 };
 }
 
diff --git a/vcl/inc/WidgetThemeLibrary.hxx b/vcl/inc/WidgetThemeLibrary.hxx
index 7d38112130c8..59692de60012 100644
--- a/vcl/inc/WidgetThemeLibrary.hxx
+++ b/vcl/inc/WidgetThemeLibrary.hxx
@@ -14,9 +14,27 @@
 #include <cairo.h>
 #include <vcl/dllapi.h>
 #include <vcl/salnativewidgets.hxx>
+#include <tools/color.hxx>
 
 namespace vcl
 {
+struct WidgetDrawStyle
+{
+    Color maFaceColor;
+    Color maLightColor;
+    Color maLightBorderColor;
+    Color maShadowColor;
+    Color maDarkShadowColor;
+    Color maHighlightColor;
+    Color maHighlightTextColor;
+    Color maActiveTabColor;
+    Color maInactiveTabColor;
+    Color maWindowColor;
+    Color maWindowTextColor;
+    Color maDialogColor;
+    Color maDialogTextColor;
+};
+
 struct ControlDrawParameters
 {
     ControlDrawParameters(cairo_t* i_pCairo, ControlPart i_ePart, ControlState i_eState)
@@ -76,6 +94,8 @@ public:
     virtual bool drawListNet(ControlDrawParameters const& rParameters, long nWidth, long nHeight);
     virtual bool drawListHeader(ControlDrawParameters const& rParameters, long nWidth,
                                 long nHeight);
+
+    virtual bool updateSettings(WidgetDrawStyle& rSettings);
 };
 
 extern "C" vcl::WidgetThemeLibrary* CreateWidgetThemeLibrary();
diff --git a/vcl/inc/headless/CustomWidgetDraw.hxx b/vcl/inc/headless/CustomWidgetDraw.hxx
index ce749ac15b63..89082803abc3 100644
--- a/vcl/inc/headless/CustomWidgetDraw.hxx
+++ b/vcl/inc/headless/CustomWidgetDraw.hxx
@@ -16,6 +16,7 @@
 #include <WidgetDrawInterface.hxx>
 #include <WidgetThemeLibrary.hxx>
 #include <headless/svpgdi.hxx>
+#include <vcl/settings.hxx>
 #include <memory>
 
 namespace vcl
@@ -45,6 +46,8 @@ public:
                                 const ImplControlValue& aValue, const OUString& aCaption,
                                 tools::Rectangle& rNativeBoundingRegion,
                                 tools::Rectangle& rNativeContentRegion) override;
+
+    bool updateSettings(AllSettings& rSettings) override;
 };
 
 } // end vcl namespace
diff --git a/vcl/inc/headless/svpgdi.hxx b/vcl/inc/headless/svpgdi.hxx
index b8d20a548a6f..21b1b0537c8e 100644
--- a/vcl/inc/headless/svpgdi.hxx
+++ b/vcl/inc/headless/svpgdi.hxx
@@ -280,6 +280,8 @@ public:
                                  tools::Rectangle& rNativeBoundingRegion,
                                  tools::Rectangle& rNativeContentRegion) override;
 
+    virtual void updateSettings(AllSettings& rSettings);
+
 #if ENABLE_CAIRO_CANVAS
     virtual bool            SupportsCairo() const override;
     virtual cairo::SurfaceSharedPtr CreateSurface(const cairo::CairoSurfaceSharedPtr& rSurface) const override;
diff --git a/vcl/inc/unx/gtk/gtkgdi.hxx b/vcl/inc/unx/gtk/gtkgdi.hxx
index e5eaef3747c1..839ee9eaac45 100644
--- a/vcl/inc/unx/gtk/gtkgdi.hxx
+++ b/vcl/inc/unx/gtk/gtkgdi.hxx
@@ -120,6 +120,9 @@ public:
                                                     const OUString& rCaption,
                                                     tools::Rectangle &rNativeBoundingRegion,
                                                     tools::Rectangle &rNativeContentRegion ) override;
+
+    virtual void updateSettings(AllSettings& rSettings) override;
+
 #if ENABLE_CAIRO_CANVAS
 
     virtual bool        SupportsCairo() const override;
@@ -130,7 +133,6 @@ public:
 
     void WidgetQueueDraw() const;
 
-    void updateSettings( AllSettings& rSettings );
     static void refreshFontconfig( GtkSettings *pSettings );
     static void signalSettingsNotify( GObject*, GParamSpec *pSpec, gpointer );