1 files changed, 126 insertions, 0 deletions
diff --git a/vcl/inc/WidgetDrawInterface.hxx b/vcl/inc/WidgetDrawInterface.hxx
new file mode 100644
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+++ b/vcl/inc/WidgetDrawInterface.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#ifndef INCLUDED_VCL_INC_WIDGETDRAWINTERFACE_HXX
+#define INCLUDED_VCL_INC_WIDGETDRAWINTERFACE_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/salnativewidgets.hxx>
+#include <vcl/settings.hxx>
+
+namespace vcl
+{
+class VCL_PLUGIN_PUBLIC WidgetDrawInterface
+{
+public:
+    virtual ~WidgetDrawInterface() COVERITY_NOEXCEPT_FALSE {}
+
+    /**
+     * Query the platform layer for native control support.
+     *
+     * @param [in] eType The widget type.
+     * @param [in] ePart The part of the widget.
+     * @return true if the platform supports native drawing of the widget type defined by part.
+     */
+    virtual inline bool isNativeControlSupported(ControlType eType, ControlPart ePart);
+
+    /**
+     * Query if a position is inside the native widget part.
+     *
+     * Mainly used for scrollbars.
+     *
+     * @param [in] eType The widget type.
+     * @param [in] ePart The part of the widget.
+     * @param [in] rBoundingControlRegion The bounding Rectangle of
+                   the complete control in VCL frame coordinates.
+     * @param [in] aPos The position to check the hit.
+     * @param [out] rIsInside true, if \a aPos was inside the native widget.
+     * @return true, if the query was successful.
+     */
+    virtual inline bool hitTestNativeControl(ControlType eType, ControlPart ePart,
+                                             const tools::Rectangle& rBoundingControlRegion,
+                                             const Point& aPos, bool& rIsInside);
+
+    /**
+     * Draw the requested control.
+     *
+     * @param [in] eType The widget type.
+     * @param [in] ePart The part of the widget.
+     * @param [in] rBoundingControlRegion The bounding rectangle of
+     *             the complete control in VCL frame coordinates.
+     * @param [in] eState The general state of the control (enabled, focused, etc.).
+     * @param [in] aValue Addition control specific information.
+     * @param [in] aCaption  A caption or title string (like button text etc.).
+     * @param [in] rBackgroundColor Background color for the control (may be COL_AUTO)
+     * @return true, if the control could be drawn.
+     */
+    virtual inline bool drawNativeControl(ControlType eType, ControlPart ePart,
+                                          const tools::Rectangle& rBoundingControlRegion,
+                                          ControlState eState, const ImplControlValue& aValue,
+                                          const OUString& aCaptions, const Color& rBackgroundColor);
+
+    /**
+     * Get the native control regions for the control part.
+     *
+     * If the return value is true, \a rNativeBoundingRegion contains
+     * the true bounding region covered by the control including any
+     * adornment, while \a rNativeContentRegion contains the area
+     * within the control that can be safely drawn into without drawing over
+     * the borders of the control.
+     *
+     * @param [in] eType Type of the widget.
+     * @param [in] ePart Specification of the widget's part if it consists of more than one.
+     * @param [in] rBoundingControlRegion The bounding region of the control in VCL frame coordinates.
+     * @param [in] eState The general state of the control (enabled, focused, etc.).
+     * @param [in] aValue Addition control specific information.
+     * @param [in] aCaption A caption or title string (like button text etc.).
+     * @param [out] rNativeBoundingRegion The region covered by the control including any adornment.
+     * @param [out] rNativeContentRegion The region within the control that can be safely drawn into.
+     * @return true, if the regions are filled.
+     */
+    virtual inline bool getNativeControlRegion(ControlType eType, ControlPart ePart,
+                                               const tools::Rectangle& rBoundingControlRegion,
+                                               ControlState eState, const ImplControlValue& aValue,
+                                               const OUString& aCaption,
+                                               tools::Rectangle& rNativeBoundingRegion,
+                                               tools::Rectangle& rNativeContentRegion);
+
+    virtual inline bool updateSettings(AllSettings& rSettings);
+};
+
+bool WidgetDrawInterface::isNativeControlSupported(ControlType, ControlPart) { return false; }
+
+bool WidgetDrawInterface::hitTestNativeControl(ControlType, ControlPart, const tools::Rectangle&,
+                                               const Point&, bool&)
+{
+    return false;
+}
+
+bool WidgetDrawInterface::drawNativeControl(ControlType, ControlPart, const tools::Rectangle&,
+                                            ControlState, const ImplControlValue&, const OUString&,
+                                            const Color& /*rBackgroundColor*/)
+{
+    return false;
+}
+
+bool WidgetDrawInterface::getNativeControlRegion(ControlType, ControlPart, const tools::Rectangle&,
+                                                 ControlState, const ImplControlValue&,
+                                                 const OUString&, tools::Rectangle&,
+                                                 tools::Rectangle&)
+{
+    return false;
+}
+
+bool WidgetDrawInterface::updateSettings(AllSettings&) { return false; }
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */