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nux  3.0.0
ScrollBar.h
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00001 /*
00002  * Copyright 2010 Inalogic® Inc.
00003  *
00004  * This program is free software: you can redistribute it and/or modify it
00005  * under the terms of the GNU Lesser General Public License, as
00006  * published by the  Free Software Foundation; either version 2.1 or 3.0
00007  * of the License.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranties of
00011  * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
00012  * PURPOSE.  See the applicable version of the GNU Lesser General Public
00013  * License for more details.
00014  *
00015  * You should have received a copy of both the GNU Lesser General Public
00016  * License along with this program. If not, see <http://www.gnu.org/licenses/>
00017  *
00018  * Authored by: Jay Taoko <jaytaoko@inalogic.com>
00019  *
00020  */
00021 
00022 
00023 #ifndef SCROLLBAR_H
00024 #define SCROLLBAR_H
00025 
00026 namespace nux
00027 {
00028   class ScrollView;
00029   class ScrollBar : public View //public ValuatorAbstraction
00030   {
00031   public:
00032     ScrollBar(NUX_FILE_LINE_PROTO);
00033     ~ScrollBar();
00034 
00035   private:
00036     virtual void Draw(GraphicsEngine &graphics_engine, bool force_draw) = 0;
00037     virtual void DrawContent(GraphicsEngine &graphics_engine, bool force_draw) = 0;
00038     virtual void PostDraw(GraphicsEngine &graphics_engine, bool force_draw) = 0;
00039 
00040   public:
00041     int visible() const
00042     {
00043       return m_visible;
00044     }
00045     void clear_visible()
00046     {
00047       m_visible = 0;
00048     }
00049     void set_visible()
00050     {
00051       m_visible = 1;
00052     }
00053     void resize(int x, int y, int w, int h)
00054     {
00055       SetGeometry(Geometry(x, y, w, h));
00056     }
00057 
00058     void SetScrollUnit(int unit);
00059     int GetScrollUnit() const;
00060 
00061   protected:
00062     virtual bool AcceptKeyNavFocus();
00063 
00064     int m_ScrollUnit;
00065     int m_visible;
00066     float visibility_percentage_;
00067 
00068     friend class ScrollView;
00069   };
00070 
00071 
00072 }
00073 
00074 #endif // SCROLLBAR_H
00075 
00076 
00077