ScrolledWindow.cs :  » GUI » wx-NET » wx » C# / CSharp Open Source

//-----------------------------------------------------------------------------
// wx.NET - ScrolledWindow.cs
//
// The wxScrolledWindow wrapper class.
//
// Written by Jason Perkins (jason@379.com)
// (C) 2003 by 379, Inc.
// Licensed under the wxWidgets license, see LICENSE.txt for details.
//
// $Id: ScrolledWindow.cs,v 1.22 2007/11/24 17:55:46 harald_meyer Exp $
//-----------------------------------------------------------------------------

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace wx{
  public class ScrolledWindow : Panel
  {
    [DllImport("wx-c")] static extern IntPtr wxScrollWnd_ctor(IntPtr parent, int id, int posX, int posY, int width, int height, uint style, IntPtr name);
    [DllImport("wx-c")] static extern void   wxScrollWnd_PrepareDC(IntPtr self, IntPtr dc);
    [DllImport("wx-c")] static extern void   wxScrollWnd_SetScrollbars(IntPtr self, int pixX, int pixY, int numX, int numY, int x, int y, bool noRefresh);
    [DllImport("wx-c")] static extern void   wxScrollWnd_GetViewStart(IntPtr self, ref int x, ref int y);
    [DllImport("wx-c")] static extern void   wxScrollWnd_GetScrollPixelsPerUnit(IntPtr self, ref int xUnit, ref int yUnit);
    
    [DllImport("wx-c")] static extern void   wxScrollWnd_CalcScrolledPosition(IntPtr self, int x, int y, ref int xx, ref int yy);
    [DllImport("wx-c")] static extern void   wxScrollWnd_CalcUnscrolledPosition(IntPtr self, int x, int y, ref int xx, ref int yy);
    [DllImport("wx-c")] static extern void   wxScrollWnd_GetVirtualSize(IntPtr self, ref int x, ref int y);
    [DllImport("wx-c")] static extern void   wxScrollWnd_Scroll(IntPtr self, int x, int y);
    [DllImport("wx-c")] static extern void   wxScrollWnd_SetScrollRate(IntPtr self, int xstep, int ystep);
    [DllImport("wx-c")] static extern void   wxScrollWnd_SetTargetWindow(IntPtr self, IntPtr window);

    //---------------------------------------------------------------------

    public ScrolledWindow(IntPtr wxObject) 
      : base(wxObject) { }

    public ScrolledWindow(Window parent)
      : this(parent, -1, wxDefaultPosition, wxDefaultSize, wxHSCROLL | wxVSCROLL) { }
      
    public ScrolledWindow(Window parent, int id)
      : this(parent, id, wxDefaultPosition, wxDefaultSize, wxHSCROLL | wxVSCROLL) { }
      
    public ScrolledWindow(Window parent, int id, Point pos)
      : this(parent, id, pos, wxDefaultSize, wxHSCROLL | wxVSCROLL) { }
      
    public ScrolledWindow(Window parent, int id, Point pos, Size size)
      : this(parent, id, pos, size, wxHSCROLL | wxVSCROLL) { }
      
    public ScrolledWindow(Window parent, int id, Point pos, Size size, uint style)
      : base(wxScrollWnd_ctor(Object.SafePtr(parent), id, pos.X, pos.Y, size.Width, size.Height, style, IntPtr.Zero))
    {
      EVT_PAINT(new EventListener(OnPaint));
    }

    //---------------------------------------------------------------------

    public virtual void OnDraw(DC dc)
    {
    }

    //---------------------------------------------------------------------

    public override void PrepareDC(DC dc)
    {
      wxScrollWnd_PrepareDC(wxObject, dc.wxObject);
    }

    //---------------------------------------------------------------------

    public void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY, int noUnitsX, int noUnitsY)
    { 
      SetScrollbars(pixelsPerUnitY, pixelsPerUnitY, noUnitsY, noUnitsY, 0, 0, false); 
    }
    
    public void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY, int noUnitsX, int noUnitsY, int x, int y)
    { 
      SetScrollbars(pixelsPerUnitY, pixelsPerUnitY, noUnitsY, noUnitsY, x, y, false); 
    }
    
    public void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY, int noUnitsX, int noUnitsY, int x, int y, bool noRefresh)
    {
      wxScrollWnd_SetScrollbars(wxObject, pixelsPerUnitX, pixelsPerUnitY, noUnitsX, noUnitsY, x, y, noRefresh);
    }

    //---------------------------------------------------------------------

    private void OnPaint(object sender, Event e)
    {
      PaintDC dc = new PaintDC(this);
      PrepareDC(dc);
      OnDraw(dc);
      dc.Dispose();
    }

    //---------------------------------------------------------------------

    public Point ViewStart
    {
      get {
        int x = new int(), 
        y = new int();
        GetViewStart(ref x, ref y);
        return new Point(x, y);
      }
    }

    public void GetViewStart(ref int x, ref int y)
    {
      wxScrollWnd_GetViewStart(wxObject, ref x, ref y);
    }

    //---------------------------------------------------------------------

    public void GetScrollPixelsPerUnit(ref int xUnit, ref int yUnit)
    {
      wxScrollWnd_GetScrollPixelsPerUnit(wxObject, ref xUnit, ref yUnit);
    }
    
    //---------------------------------------------------------------------
    
    public void CalcScrolledPosition(int x, int y, ref int xx, ref int yy)
    {
      wxScrollWnd_CalcScrolledPosition(wxObject, x, y, ref xx, ref yy);
    }
    
    //---------------------------------------------------------------------
    
    public void CalcUnscrolledPosition(int x, int y, ref int xx, ref int yy)
    {
      wxScrollWnd_CalcUnscrolledPosition(wxObject, x, y, ref xx, ref yy);
    }
    
    //---------------------------------------------------------------------
    
    public void GetVirtualSize(ref int x, ref int y)
    {
      wxScrollWnd_GetVirtualSize(wxObject, ref x, ref y);
    }
    
    //---------------------------------------------------------------------
    
    public void Scroll(int x, int y)
    {
      wxScrollWnd_Scroll(wxObject, x, y);
    }
    
    //---------------------------------------------------------------------
    
    public void SetScrollRate(int xstep, int ystep)
    {
      wxScrollWnd_SetScrollRate(wxObject, xstep, ystep);
    }
    
    //---------------------------------------------------------------------
    
    public Window TargetWindow
    {
      set { wxScrollWnd_SetTargetWindow(wxObject, Object.SafePtr(value)); }
    }
  }
}