fix the MSVC check in the last comment and accompanying comment

[wxWidgets.git] / samples / image / image.cpp

diff --git a/samples/image/image.cpp b/samples/image/image.cpp
index 99c3ab73ebf7195068b04e8094618cb39d5f5601..01af647f11d9fa230abc2a97486378bcb1bcd625 100644 (file)
--- a/samples/image/image.cpp
+++ b/samples/image/image.cpp
@@ -26,6 +26,7 @@
 #include "wx/mstream.h"
 #include "wx/wfstream.h"
 #include "wx/quantize.h"
 #include "wx/mstream.h"
 #include "wx/wfstream.h"
 #include "wx/quantize.h"

+#include "wx/stopwatch.h"

 
 #if wxUSE_CLIPBOARD
     #include "wx/dataobj.h"
 
 #if wxUSE_CLIPBOARD
     #include "wx/dataobj.h"


@@ -118,6 +119,9 @@ public:
 
     void OnAbout( wxCommandEvent &event );
     void OnNewFrame( wxCommandEvent &event );
 
     void OnAbout( wxCommandEvent &event );
     void OnNewFrame( wxCommandEvent &event );

+    void OnImageInfo( wxCommandEvent &event );
+    void OnThumbnail( wxCommandEvent &event );
+

 #ifdef wxHAVE_RAW_BITMAP
     void OnTestRawBitmap( wxCommandEvent &event );
 #endif // wxHAVE_RAW_BITMAP
 #ifdef wxHAVE_RAW_BITMAP
     void OnTestRawBitmap( wxCommandEvent &event );
 #endif // wxHAVE_RAW_BITMAP


@@ -131,20 +135,60 @@ public:
     MyCanvas         *m_canvas;
 
 private:
     MyCanvas         *m_canvas;
 
 private:

+    // ask user for the file name and try to load an image from it
+    //
+    // return the file path on success, empty string if we failed to load the
+    // image or were cancelled by user
+    static wxString LoadUserImage(wxImage& image);
+
+

     DECLARE_DYNAMIC_CLASS(MyFrame)
     DECLARE_EVENT_TABLE()
 };
 
     DECLARE_DYNAMIC_CLASS(MyFrame)
     DECLARE_EVENT_TABLE()
 };
 

+// ----------------------------------------------------------------------------
+// Frame used for showing a standalone image
+// ----------------------------------------------------------------------------
+
+enum
+{
+    ID_ROTATE_LEFT = wxID_HIGHEST+1,
+    ID_ROTATE_RIGHT,
+    ID_RESIZE,
+    ID_PAINT_BG
+};
+

 class MyImageFrame : public wxFrame
 {
 public:
 class MyImageFrame : public wxFrame
 {
 public:

-    MyImageFrame(wxFrame *parent, const wxBitmap& bitmap)
-        : wxFrame(parent, wxID_ANY, _T("Double click to save"),
+    MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap)
+        : wxFrame(parent, wxID_ANY,
+                  wxString::Format(_T("Image from %s"), desc.c_str()),

                   wxDefaultPosition, wxDefaultSize,
                   wxDefaultPosition, wxDefaultSize,

-                  wxCAPTION | wxSYSTEM_MENU | wxCLOSE_BOX),
+                  wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE),

                   m_bitmap(bitmap)
     {
                   m_bitmap(bitmap)
     {

+        wxMenu *menu = new wxMenu;
+        menu->Append(wxID_SAVE);
+        menu->AppendSeparator();
+        m_pClearBgMenu = menu->AppendCheckItem(ID_PAINT_BG, _T("&Paint background"));
+        menu->AppendSeparator();
+        menu->Append(ID_RESIZE, _T("&Fit to window\tCtrl-F"));
+        menu->AppendSeparator();
+        menu->Append(ID_ROTATE_LEFT, _T("Rotate &left\tCtrl-L"));
+        menu->Append(ID_ROTATE_RIGHT, _T("Rotate &right\tCtrl-R"));
+
+        wxMenuBar *mbar = new wxMenuBar;
+        mbar->Append(menu, _T("&Image"));
+        SetMenuBar(mbar);
+
+        CreateStatusBar();
+

         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());

+
+        UpdateStatusBar();
+
+//        SetBackgroundColour(*wxWHITE);

     }
 
     void OnEraseBackground(wxEraseEvent& WXUNUSED(event))
     }
 
     void OnEraseBackground(wxEraseEvent& WXUNUSED(event))


@@ -154,11 +198,19 @@ public:
 
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {
 
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {

-        wxPaintDC dc( this );
-        dc.DrawBitmap( m_bitmap, 0, 0, true /* use mask */ );
+        wxPaintDC dc(this);
+
+        if (m_pClearBgMenu->IsChecked())
+            ClearBackground();
+
+        const wxSize size = GetClientSize();
+        dc.DrawBitmap(m_bitmap,
+                      (size.x - m_bitmap.GetWidth())/2,
+                      (size.y - m_bitmap.GetHeight())/2,
+                      true /* use mask */);

     }
 
     }
 

-    void OnSave(wxMouseEvent& WXUNUSED(event))
+    void OnSave(wxCommandEvent& WXUNUSED(event))

     {
 #if wxUSE_FILEDLG
         wxImage image = m_bitmap.ConvertToImage();
     {
 #if wxUSE_FILEDLG
         wxImage image = m_bitmap.ConvertToImage();


@@ -284,8 +336,48 @@ public:
 #endif // wxUSE_FILEDLG
     }
 
 #endif // wxUSE_FILEDLG
     }
 

+    void OnResize(wxCommandEvent& WXUNUSED(event))
+    {
+        wxImage img(m_bitmap.ConvertToImage());
+
+        const wxSize size = GetClientSize();
+        img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
+        m_bitmap = wxBitmap(img);
+
+        UpdateStatusBar();
+        Refresh();
+    }
+
+    void OnRotate(wxCommandEvent& event)
+    {
+        double angle = 5;
+        if ( event.GetId() == ID_ROTATE_LEFT )
+            angle = -angle;
+
+        wxImage img(m_bitmap.ConvertToImage());
+        img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
+        if ( !img.Ok() )
+        {
+            wxLogWarning(_T("Rotation failed"));
+            return;
+        }
+
+        m_bitmap = wxBitmap(img);
+
+        UpdateStatusBar();
+        Refresh();
+    }
+

 private:
 private:

+    void UpdateStatusBar()
+    {
+        wxLogStatus(this, _T("Image size: (%d, %d)"),
+                    m_bitmap.GetWidth(),
+                    m_bitmap.GetHeight());
+    }
+

     wxBitmap m_bitmap;
     wxBitmap m_bitmap;

+    wxMenuItem* m_pClearBgMenu;

 
     DECLARE_EVENT_TABLE()
 };
 
     DECLARE_EVENT_TABLE()
 };


@@ -326,7 +418,6 @@ public:
                 wxLogError(_T("Failed to gain raw access to bitmap data"));
                 return;
             }
                 wxLogError(_T("Failed to gain raw access to bitmap data"));
                 return;
             }

-            data.UseAlpha();

             wxAlphaPixelData::Iterator p(data);
             for ( int y = 0; y < SIZE; ++y )
             {
             wxAlphaPixelData::Iterator p(data);
             for ( int y = 0; y < SIZE; ++y )
             {


@@ -350,7 +441,6 @@ public:
             return;
         }
 
             return;
         }
 

-        data.UseAlpha();

         wxAlphaPixelData::Iterator p(data);
 
         for ( int y = 0; y < REAL_SIZE; ++y )
         wxAlphaPixelData::Iterator p(data);
 
         for ( int y = 0; y < REAL_SIZE; ++y )


@@ -448,7 +538,10 @@ IMPLEMENT_APP(MyApp)
 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
     EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
     EVT_PAINT(MyImageFrame::OnPaint)
 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
     EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
     EVT_PAINT(MyImageFrame::OnPaint)

-    EVT_LEFT_DCLICK(MyImageFrame::OnSave)
+
+    EVT_MENU(wxID_SAVE, MyImageFrame::OnSave)
+    EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate)
+    EVT_MENU(ID_RESIZE, MyImageFrame::OnResize)

 END_EVENT_TABLE()
 
 #ifdef wxHAVE_RAW_BITMAP
 END_EVENT_TABLE()
 
 #ifdef wxHAVE_RAW_BITMAP


@@ -1029,17 +1122,21 @@ enum
     ID_QUIT  = wxID_EXIT,
     ID_ABOUT = wxID_ABOUT,
     ID_NEW = 100,
     ID_QUIT  = wxID_EXIT,
     ID_ABOUT = wxID_ABOUT,
     ID_NEW = 100,

-    ID_SHOWRAW = 101
+    ID_INFO,
+    ID_SHOWRAW,
+    ID_SHOWTHUMBNAIL

 };
 
 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 
 };
 
 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 

-BEGIN_EVENT_TABLE(MyFrame,wxFrame)
+BEGIN_EVENT_TABLE(MyFrame, wxFrame)

   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)

-  EVT_MENU    (ID_NEW,  MyFrame::OnNewFrame)
+  EVT_MENU    (ID_NEW,   MyFrame::OnNewFrame)
+  EVT_MENU    (ID_INFO,  MyFrame::OnImageInfo)
+  EVT_MENU    (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail)

 #ifdef wxHAVE_RAW_BITMAP
 #ifdef wxHAVE_RAW_BITMAP

-  EVT_MENU    (ID_SHOWRAW,  MyFrame::OnTestRawBitmap)
+  EVT_MENU    (ID_SHOWRAW, MyFrame::OnTestRawBitmap)

 #endif
 
 #if wxUSE_CLIPBOARD
 #endif
 
 #if wxUSE_CLIPBOARD


@@ -1056,11 +1153,15 @@ MyFrame::MyFrame()
 
   wxMenu *menuImage = new wxMenu;
   menuImage->Append( ID_NEW, _T("&Show any image...\tCtrl-O"));
 
   wxMenu *menuImage = new wxMenu;
   menuImage->Append( ID_NEW, _T("&Show any image...\tCtrl-O"));

-
+  menuImage->Append( ID_INFO, _T("Show image &information...\tCtrl-I"));

 #ifdef wxHAVE_RAW_BITMAP
 #ifdef wxHAVE_RAW_BITMAP

+  menuImage->AppendSeparator();

   menuImage->Append( ID_SHOWRAW, _T("Test &raw bitmap...\tCtrl-R"));
 #endif
   menuImage->AppendSeparator();
   menuImage->Append( ID_SHOWRAW, _T("Test &raw bitmap...\tCtrl-R"));
 #endif
   menuImage->AppendSeparator();

+  menuImage->Append( ID_SHOWTHUMBNAIL, _T("Test &thumbnail...\tCtrl-T"),
+                    "Test scaling the image during load (try with JPEG)");
+  menuImage->AppendSeparator();

   menuImage->Append( ID_ABOUT, _T("&About..."));
   menuImage->AppendSeparator();
   menuImage->Append( ID_QUIT, _T("E&xit\tCtrl-Q"));
   menuImage->Append( ID_ABOUT, _T("&About..."));
   menuImage->AppendSeparator();
   menuImage->Append( ID_QUIT, _T("E&xit\tCtrl-Q"));


@@ -1099,23 +1200,71 @@ void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
                       _T("About wxImage Demo"), wxICON_INFORMATION | wxOK );
 }
 
                       _T("About wxImage Demo"), wxICON_INFORMATION | wxOK );
 }
 

-void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
+wxString MyFrame::LoadUserImage(wxImage& image)

 {
 {

+    wxString filename;
+

 #if wxUSE_FILEDLG
 #if wxUSE_FILEDLG

-    wxString filename = wxFileSelector(_T("Select image file"));
-    if ( !filename )
-        return;
+    filename = wxFileSelector(_T("Select image file"));
+    if ( !filename.empty() )
+    {
+        if ( !image.LoadFile(filename) )
+        {
+            wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
+
+            return wxEmptyString;
+        }
+    }
+#endif // wxUSE_FILEDLG

 
 

+    return filename;
+}
+
+void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
+{

     wxImage image;
     wxImage image;

-    if ( !image.LoadFile(filename) )
+    wxString filename = LoadUserImage(image);
+    if ( !filename.empty() )
+        (new MyImageFrame(this, filename, wxBitmap(image)))->Show();
+}
+
+void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) )
+{
+    wxImage image;
+    if ( !LoadUserImage(image).empty() )

     {
     {

-        wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
+        // TODO: show more information about the file
+        wxString info = wxString::Format("Image size: %dx%d",
+                                         image.GetWidth(),
+                                         image.GetHeight());
+
+        int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX),
+            yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY);
+        if ( xres || yres )
+        {
+            info += wxString::Format("\nResolution: %dx%d", xres, yres);
+            switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) )
+            {
+                default:
+                    wxFAIL_MSG( "unknown image resolution units" );
+                    // fall through

 
 

-        return;
-    }
+                case wxIMAGE_RESOLUTION_NONE:
+                    info += " in default units";
+                    break;

 
 

-    (new MyImageFrame(this, wxBitmap(image)))->Show();
-#endif // wxUSE_FILEDLG
+                case wxIMAGE_RESOLUTION_INCHES:
+                    info += " in";
+                    break;
+
+                case wxIMAGE_RESOLUTION_CM:
+                    info += " cm";
+                    break;
+            }
+        }
+
+        wxLogMessage("%s", info);
+    }

 }
 
 #ifdef wxHAVE_RAW_BITMAP
 }
 
 #ifdef wxHAVE_RAW_BITMAP


@@ -1155,7 +1304,7 @@ void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
     }
     else
     {
     }
     else
     {

-        (new MyImageFrame(this, dobjBmp.GetBitmap()))->Show();
+        (new MyImageFrame(this, _T("Clipboard"), dobjBmp.GetBitmap()))->Show();

     }
     wxTheClipboard->Close();
 }
     }
     wxTheClipboard->Close();
 }


@@ -1178,3 +1327,37 @@ bool MyApp::OnInit()
 
     return true;
 }
 
     return true;
 }

+
+void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) )
+{
+#if wxUSE_FILEDLG
+    wxString filename = wxFileSelector(_T("Select image file"));
+    if ( filename.empty() )
+        return;
+
+    static const int THUMBNAIL_WIDTH = 320;
+    static const int THUMBNAIL_HEIGHT = 240;
+
+    wxImage image;
+    image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH);
+    image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT);
+
+    wxStopWatch sw;
+    if ( !image.LoadFile(filename) )
+    {
+        wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
+        return;
+    }
+
+    const long loadTime = sw.Time();
+
+    MyImageFrame * const
+        frame = new MyImageFrame(this, filename, wxBitmap(image));
+    frame->Show();
+    wxLogStatus(frame, "Loaded \"%s\" in %ldms", filename, loadTime);
+#else
+    wxLogError( _T("Couldn't create file selector dialog") );
+    return;
+#endif // wxUSE_FILEDLG
+}
+