samples/rotate/rotate.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:      rotate.cpp
   3 // Purpose:   Image rotation test
   4 // Author:    Carlos Moreno
   5 // Modified by:
   6 // Created:   6/2/2000
   7 // RCS-ID:    $Id$
   8 // Copyright: (c) 2000
   9 // Licence:   wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/image.h"
  24
  25 #include <math.h>       // M_PI
  26
  27 class MyApp: public wxApp
  28 {
  29 public:
  30     virtual bool OnInit();
  31
  32     const wxImage& GetImage() const { return m_image; }
  33
  34 private:
  35     wxImage m_image;
  36 };
  37
  38
  39 class MyFrame: public wxFrame
  40 {
  41 public:
  42     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  43
  44     void OnQuit (wxCommandEvent &);
  45     void OnAngle(wxCommandEvent &);
  46     void OnMouseLeftUp (wxMouseEvent & event);
  47     void OnMouseRightUp (wxMouseEvent & event);
  48
  49 private:
  50     double  m_angle;
  51
  52     DECLARE_EVENT_TABLE()
  53 };
  54
  55 enum
  56 {
  57     ID_Quit = 1,
  58     ID_Angle
  59 };
  60
  61 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  62     EVT_MENU (ID_Quit, MyFrame::OnQuit)
  63     EVT_MENU (ID_Angle, MyFrame::OnAngle)
  64     EVT_LEFT_UP (MyFrame::OnMouseLeftUp)
  65     EVT_RIGHT_UP (MyFrame::OnMouseRightUp)
  66 END_EVENT_TABLE()
  67
  68 IMPLEMENT_APP(MyApp)
  69
  70
  71 bool MyApp::OnInit()
  72 {
  73     m_image = wxImage("kclub.bmp", wxBITMAP_TYPE_BMP);
  74     if ( !m_image.Ok() )
  75     {
  76         wxLogError("Can't load the test image, please copy it to the "
  77                    "program directory");
  78         return FALSE;
  79     }
  80
  81     MyFrame *frame = new MyFrame ("wxWindows rotate sample",
  82                                   wxPoint(20,20), wxSize(600,450));
  83
  84     frame->SetBackgroundColour (wxColour (0,80,60));
  85
  86     frame->Show (TRUE);
  87     SetTopWindow (frame);
  88     return TRUE;
  89 }
  90
  91 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
  92     : wxFrame((wxFrame *)NULL, -1, title, pos, size)
  93 {
  94     m_angle = 0.1;
  95
  96     wxMenu *menuFile = new wxMenu;
  97     menuFile->Append (ID_Angle, "Set &angle\tCtrl-A");
  98     menuFile->AppendSeparator();
  99     menuFile->Append (ID_Quit, "E&xit\tAlt-X");
 100
 101     wxMenuBar *menuBar = new wxMenuBar;
 102     menuBar->Append (menuFile, "&File");
 103
 104     SetMenuBar (menuBar);
 105 }
 106
 107 void MyFrame::OnAngle (wxCommandEvent &)
 108 {
 109     long degrees = (long)((180*m_angle)/M_PI);
 110     degrees = wxGetNumberFromUser("Change the image rotation angle",
 111                                   "Angle in degrees:",
 112                                   "wxWindows rotate sample",
 113                                   degrees,
 114                                   -180, +180,
 115                                   this);
 116     m_angle = (degrees * M_PI) / 180.0;
 117 }
 118
 119 void MyFrame::OnQuit (wxCommandEvent &)
 120 {
 121     Close (TRUE);
 122 }
 123
 124
 125 // Rotate with interpolation and with offset correction
 126 void MyFrame::OnMouseLeftUp (wxMouseEvent & event)
 127 {
 128     wxPoint offset;
 129     const wxImage& img = wxGetApp().GetImage();
 130     wxImage img2 = img.Rotate(m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), TRUE, &offset);
 131
 132     wxBitmap bmp = img2.ConvertToBitmap ();
 133
 134     wxClientDC dc (this);
 135     dc.DrawBitmap (img2.ConvertToBitmap(), event.m_x + offset.x, event.m_y + offset.y);
 136 }
 137
 138 // without interpolation, and without offset correction
 139 void MyFrame::OnMouseRightUp (wxMouseEvent & event)
 140 {
 141     const wxImage& img = wxGetApp().GetImage();
 142     wxImage img2 = img.Rotate(m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), FALSE);
 143
 144     wxBitmap bmp = img2.ConvertToBitmap ();
 145
 146     wxClientDC dc (this);
 147     dc.DrawBitmap (bmp, event.m_x, event.m_y);
 148 }