| 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("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 ("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, "Set &angle\tCtrl-A"); |
| 121 | menuFile->AppendSeparator(); |
| 122 | menuFile->Append (ID_Quit, "E&xit\tAlt-X"); |
| 123 | |
| 124 | wxMenuBar *menuBar = new wxMenuBar; |
| 125 | menuBar->Append (menuFile, "&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("Change the image rotation angle", |
| 134 | "Angle in degrees:", |
| 135 | "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 | Clear(); |
| 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 | } |