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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 /* GRG: This is not ANSI standard, define M_PI explicitly
26 #include <math.h> // M_PI
27 */
28
29 #ifndef M_PI
30 #define M_PI 3.1415926535897932384626433832795
31 #endif
32
33
34 class MyApp: public wxApp
35 {
36 public:
37 virtual bool OnInit();
38
39 const wxImage& GetImage() const { return m_image; }
40
41 private:
42 wxImage m_image;
43 };
44
45
46 class MyCanvas: public wxScrolledWindow
47 {
48 public:
49 MyCanvas(wxWindow* parent);
50
51 void OnMouseLeftUp (wxMouseEvent & event);
52 void OnMouseRightUp (wxMouseEvent & event);
53
54 private:
55
56 DECLARE_EVENT_TABLE()
57 };
58
59 class MyFrame: public wxFrame
60 {
61 public:
62 MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
63
64 void OnQuit (wxCommandEvent &);
65 void OnAngle(wxCommandEvent &);
66
67 double m_angle;
68
69 DECLARE_EVENT_TABLE()
70 };
71
72 enum
73 {
74 ID_Quit = 1,
75 ID_Angle
76 };
77
78 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
79 EVT_LEFT_UP (MyCanvas::OnMouseLeftUp)
80 EVT_RIGHT_UP (MyCanvas::OnMouseRightUp)
81 END_EVENT_TABLE()
82
83 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
84 EVT_MENU (ID_Quit, MyFrame::OnQuit)
85 EVT_MENU (ID_Angle, MyFrame::OnAngle)
86 END_EVENT_TABLE()
87
88 IMPLEMENT_APP(MyApp)
89
90 bool MyApp::OnInit()
91 {
92 m_image = wxImage(_T("kclub.bmp"), wxBITMAP_TYPE_BMP);
93
94 // any unused colour will do
95 m_image.SetMaskColour( 0, 255, 255 );
96
97 if ( !m_image.Ok() )
98 {
99 wxLogError(wxT("Can't load the test image, please copy it to the ")
100 wxT("program directory"));
101 return FALSE;
102 }
103
104 MyFrame *frame = new MyFrame (_T("wxWindows rotate sample"),
105 wxPoint(20,20), wxSize(600,450));
106
107 frame->Show (TRUE);
108 SetTopWindow (frame);
109 return TRUE;
110 }
111
112 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
113 : wxFrame((wxFrame *)NULL, -1, title, pos, size)
114 {
115 m_angle = 0.1;
116
117 new MyCanvas(this);
118
119 wxMenu *menuFile = new wxMenu;
120 menuFile->Append (ID_Angle, _T("Set &angle\tCtrl-A"));
121 menuFile->AppendSeparator();
122 menuFile->Append (ID_Quit, _T("E&xit\tAlt-X"));
123
124 wxMenuBar *menuBar = new wxMenuBar;
125 menuBar->Append (menuFile, _T("&File"));
126
127 SetMenuBar (menuBar);
128 }
129
130 void MyFrame::OnAngle (wxCommandEvent &)
131 {
132 long degrees = (long)((180*m_angle)/M_PI);
133 degrees = wxGetNumberFromUser(_T("Change the image rotation angle"),
134 _T("Angle in degrees:"),
135 _T("wxWindows rotate sample"),
136 degrees,
137 -180, +180,
138 this);
139 if ( degrees != -1 )
140 m_angle = (degrees * M_PI) / 180.0;
141 }
142
143 void MyFrame::OnQuit (wxCommandEvent &)
144 {
145 Close (TRUE);
146 }
147
148 MyCanvas::MyCanvas(wxWindow* parent):
149 wxScrolledWindow(parent, -1)
150 {
151 SetBackgroundColour (wxColour (0,80,60));
152 ClearBackground();
153 }
154
155 // Rotate with interpolation and with offset correction
156 void MyCanvas::OnMouseLeftUp (wxMouseEvent & event)
157 {
158 MyFrame* frame = (MyFrame*) GetParent();
159
160 wxPoint offset;
161 const wxImage& img = wxGetApp().GetImage();
162 wxImage img2 = img.Rotate(frame->m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), TRUE, &offset);
163
164 wxBitmap bmp(img2);
165
166 wxClientDC dc (this);
167 dc.DrawBitmap (bmp, event.m_x + offset.x, event.m_y + offset.y, TRUE);
168 }
169
170 // without interpolation, and without offset correction
171 void MyCanvas::OnMouseRightUp (wxMouseEvent & event)
172 {
173 MyFrame* frame = (MyFrame*) GetParent();
174
175 const wxImage& img = wxGetApp().GetImage();
176 wxImage img2 = img.Rotate(frame->m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), FALSE);
177
178 wxBitmap bmp(img2);
179
180 wxClientDC dc (this);
181 dc.DrawBitmap (bmp, event.m_x, event.m_y, TRUE);
182 }