Allow draw symbol with mouse

Use left click to draw black symbol.
Use right click to rub the symbol.

Change-Id: I3cb2155f105452f8b0f92a7fe2873ce98168cf2d

3 files changed, 118 insertions, 5 deletions

diff --git a/cui/source/dialogs/cuicharmap.cxx b/cui/source/dialogs/cuicharmap.cxx
index 4c6a2b3a3d82..7ca01ffba5b1 100644
--- a/cui/source/dialogs/cuicharmap.cxx
+++ b/cui/source/dialogs/cuicharmap.cxx
@@ -1281,4 +1281,97 @@ void SvxShowText::SetText( const OUString& rText )
 }
 
 
+VCL_BUILDER_FACTORY(DrawingAreaOcr)
+
+void DrawingAreaOcr::MouseButtonDown (const MouseEvent &rMEvt)
+{
+    if (rMEvt.IsLeft())
+    {
+        state = State::DRAW;
+    }
+    else if (rMEvt.IsRight())
+    {
+        state = State::DELETE;
+    }
+
+    if (state != State::NONE)
+    {
+        const Point & mouse_pos = rMEvt.GetPosPixel();
+
+        data.emplace_back(mouse_pos.X(), mouse_pos.Y(), state);
+    }
+}
+
+void DrawingAreaOcr::MouseMove( const MouseEvent &rMEvt )
+{
+    const Point & mouse_pos = rMEvt.GetPosPixel();
+
+    if (state != State::NONE)
+    {
+        data.emplace_back(mouse_pos.X(), mouse_pos.Y(), state);
+    }
+
+    Invalidate();
+    Update();
+    std::cout << static_cast<int>(state) << std::endl;
+}
+
+void DrawingAreaOcr::MouseButtonUp (const MouseEvent &rMEvt)
+{
+    const Point & mouse_pos = rMEvt.GetPosPixel();
+    state = State::NONE;
+    data.emplace_back(mouse_pos.X(), mouse_pos.Y(), state);
+}
+
+void DrawingAreaOcr::Paint(vcl::RenderContext& rRenderContext, const ::tools::Rectangle&)
+{
+    Color aTextCol = rRenderContext.GetLineColor();
+
+    rRenderContext.SetLineColor(Color( COL_WHITE ));
+    rRenderContext.DrawRect(tools::Rectangle(Point(0, 0), Size(GetOutputSizePixel().Width(), GetOutputSizePixel().Height())));
+
+    const auto * i_1 = &data.front();
+    basegfx::B2DPolygon aB2DPolyLine;
+    for (const auto & i : data)
+    {
+        if (i_1->state == i.state)
+        {
+            aB2DPolyLine.append(basegfx::B2DPoint(i.x, i.y));
+        }
+        else
+        {
+            if (i_1->state == State::DRAW)
+            {
+                rRenderContext.SetLineColor(Color( COL_BLACK ));
+                rRenderContext.DrawPolyLine(aB2DPolyLine, 10.0);
+            }
+            else if (i_1->state == State::DELETE)
+            {
+                rRenderContext.SetLineColor(Color( COL_WHITE ));
+                rRenderContext.DrawPolyLine(aB2DPolyLine, 10.0);
+            }
+            aB2DPolyLine.clear();
+        }
+        i_1 = &i;
+    }
+
+    size_t size = data.size();
+    if (size >= 2)
+    {
+        if (data[size-2].state == State::DRAW)
+        {
+            rRenderContext.SetLineColor(Color( COL_BLACK ));
+            rRenderContext.DrawPolyLine(aB2DPolyLine, 10.0);
+        }
+        else if (data[size-2].state == State::DELETE)
+        {
+            rRenderContext.SetLineColor(Color( COL_WHITE ));
+            rRenderContext.DrawPolyLine(aB2DPolyLine, 10.0);
+        }
+        aB2DPolyLine.clear();
+    }
+
+    rRenderContext.SetTextLineColor(aTextCol);
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/cui/source/inc/cuicharmap.hxx b/cui/source/inc/cuicharmap.hxx
index 7e2619efc10b..752678e1ad91 100644
--- a/cui/source/inc/cuicharmap.hxx
+++ b/cui/source/inc/cuicharmap.hxx
@@ -39,6 +39,28 @@ namespace svx
     struct SvxShowCharSetItem;
 }
 
+class DrawingAreaOcr : public Control
+{
+public:
+    DrawingAreaOcr(vcl::Window* pParent) : Control(pParent, WB_BORDER), state(State::NONE) {}
+    void MouseButtonDown (const MouseEvent &rMEvt) override;
+    void MouseMove( const MouseEvent &rMEvt ) override;
+    void MouseButtonUp (const MouseEvent &rMEvt) override;
+    void Paint( vcl::RenderContext& rRenderContext, const ::tools::Rectangle& ) override;
+
+private:
+    enum class State {DRAW, DELETE, NONE};
+    State state;
+    struct DrawPoint
+    {
+        int x;
+        int y;
+        State state;
+        DrawPoint(int x_, int y_, State state_) : x(x_), y(y_), state(state_) {};
+    };
+    std::vector<DrawPoint> data;
+};
+
 class SvxShowText : public Control
 {
 public:
@@ -79,7 +101,7 @@ private:
     VclPtr<ListBox>        m_pSubsetLB;
     VclPtr<SvxShowText>    m_pShowChar;
     VclPtr<CheckBox>       m_pDrawChk;
-    VclPtr<vcl::Window>    m_pDrawingArea;
+    VclPtr<DrawingAreaOcr> m_pDrawingArea;
     VclPtr<Edit>           m_pSearchText;
     VclPtr<Edit>           m_pHexCodeText;
     VclPtr<Edit>           m_pDecimalCodeText;
diff --git a/cui/uiconfig/ui/specialcharacters.ui b/cui/uiconfig/ui/specialcharacters.ui
index ca21156de36c..9067d6fbb163 100644
--- a/cui/uiconfig/ui/specialcharacters.ui
+++ b/cui/uiconfig/ui/specialcharacters.ui
@@ -202,17 +202,15 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkDrawingArea" id="drawingarea">
+                  <object class="cuilo-DrawingAreaOcr" id="drawingarea">
                     <property name="width_request">80</property>
                     <property name="height_request">150</property>
                     <property name="visible">False</property>
-                    <property name="can_focus">True</property>
+                    <property name="can_focus">False</property>
                     <property name="hexpand">True</property>
                     <property name="vexpand">True</property>
                   </object>
                   <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
                     <property name="left_attach">0</property>
                     <property name="top_attach">1</property>
                   </packing>