1 files changed, 119 insertions, 0 deletions
diff --git a/sw/source/uibase/inc/swruler.hxx b/sw/source/uibase/inc/swruler.hxx
new file mode 100644
index 0000000000..6c903f9ca9
--- /dev/null
+++ b/sw/source/uibase/inc/swruler.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_SW_SOURCE_UIBASE_INC_SWRULER_HXX
+#define INCLUDED_SW_SOURCE_UIBASE_INC_SWRULER_HXX
+
+#include <svx/ruler.hxx>
+#include <vcl/timer.hxx>
+#include <vcl/virdev.hxx>
+
+class SwViewShell;
+class View;
+namespace vcl { class Window; }
+class SwEditWin;
+namespace tools { class JsonWriter; }
+
+/**
+ * An horizontal ruler with a control for comment panel visibility for Writer.
+ *
+ * The comment control only appears when the document has comments already.
+ */
+class SwCommentRuler final : public SvxRuler
+{
+public:
+    SwCommentRuler (
+        SwViewShell* pViewSh,
+        vcl::Window* pParent,
+        SwEditWin* pWin,
+        SvxRulerSupportFlags nRulerFlags,
+        SfxBindings& rBindings,
+        WinBits nWinStyle);
+    virtual ~SwCommentRuler () override;
+    virtual void dispose() override;
+
+    /**
+     * Paint the ruler.
+     * \param rRect ignored
+     */
+    virtual void Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect ) override;
+    void CreateJsonNotification(tools::JsonWriter& rJsonWriter);
+
+private:
+    SwViewShell * mpViewShell;     //< Shell to check if there is any comments on doc and their visibility
+    VclPtr<SwEditWin> mpSwWin;         //< Used to get SwView to change the SideBar visibility
+    bool        mbIsHighlighted; //< If comment control is highlighted (mouse is over it)
+    Timer       maFadeTimer;     //< Timer for high/'low'light fading
+    int         mnFadeRate;      //< From 0 to 100. 0 means not highlighted.
+    ScopedVclPtr<VirtualDevice> maVirDev;      //< VirtualDevice of this window. Just for convenience.
+
+    void NotifyKit();
+    /**
+     * Callback function to handle a mouse button down event.
+     *
+     * When on comment control, it toggles the comment panel visibility.
+     */
+    virtual void MouseButtonDown( const MouseEvent& rMEvt ) override;
+    /**
+     * Callback function to handle a mouse move event.
+     *
+     * When on comment control, it let the control responsive by highlighting.
+     */
+    virtual void MouseMove(const MouseEvent& rMEvt) override;
+    /**
+     * Callback function to handle a context menu call (mouse right button click).
+     *
+     * When on comment control, it does not do anything.
+     */
+    virtual void Command( const CommandEvent& rCEvt ) override;
+    /**
+     * Update the view.
+     *
+     * Update the ruler appearance according to the document view and
+     * current cursor position.
+     */
+    virtual void Update() override;
+
+    /**
+     * Get the rectangle area that should be used to draw the comment control.
+     *
+     * It is horizontally aligned to the SideBar panel.
+     * \return The area where the comment control is.
+     */
+    tools::Rectangle GetCommentControlRegion();
+
+    /**
+     * Paint the comment control on VirtualDevice.
+     */
+    void DrawCommentControl(vcl::RenderContext& rRenderContext);
+
+    /**
+     * Update the tooltip text.
+     */
+    void UpdateCommentHelpText();
+
+    /**
+     * Get the proper color between two options, according to current status.
+     *
+     * The return color can be one of the given colors, or a merged one.
+     * It depends on highlight fading status.
+     *
+     * \param rHighColor color used to highlight status
+     * \param rLowColor color used to normal status
+     * \return The proper color to used in moment
+     */
+    Color GetFadedColor(const Color &rHighColor, const Color &rLowColor);
+
+    /// Fade timer callback.
+    DECL_LINK(FadeHandler, Timer *, void);
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */