wxWidgets/samples/rotate/rotate.cpp
2002-03-24 00:22:15 +00:00

183 lines
4.1 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: rotate.cpp
// Purpose: Image rotation test
// Author: Carlos Moreno
// Modified by:
// Created: 6/2/2000
// RCS-ID: $Id$
// Copyright: (c) 2000
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/image.h"
/* GRG: This is not ANSI standard, define M_PI explicitly
#include <math.h> // M_PI
*/
#ifndef M_PI
#define M_PI 3.1415926535897932384626433832795
#endif
class MyApp: public wxApp
{
public:
virtual bool OnInit();
const wxImage& GetImage() const { return m_image; }
private:
wxImage m_image;
};
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas(wxWindow* parent);
void OnMouseLeftUp (wxMouseEvent & event);
void OnMouseRightUp (wxMouseEvent & event);
private:
DECLARE_EVENT_TABLE()
};
class MyFrame: public wxFrame
{
public:
MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
void OnQuit (wxCommandEvent &);
void OnAngle(wxCommandEvent &);
double m_angle;
DECLARE_EVENT_TABLE()
};
enum
{
ID_Quit = 1,
ID_Angle
};
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_LEFT_UP (MyCanvas::OnMouseLeftUp)
EVT_RIGHT_UP (MyCanvas::OnMouseRightUp)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU (ID_Quit, MyFrame::OnQuit)
EVT_MENU (ID_Angle, MyFrame::OnAngle)
END_EVENT_TABLE()
IMPLEMENT_APP(MyApp)
bool MyApp::OnInit()
{
m_image = wxImage("kclub.bmp", wxBITMAP_TYPE_BMP);
// any unused colour will do
m_image.SetMaskColour( 0, 255, 255 );
if ( !m_image.Ok() )
{
wxLogError(wxT("Can't load the test image, please copy it to the ")
wxT("program directory"));
return FALSE;
}
MyFrame *frame = new MyFrame ("wxWindows rotate sample",
wxPoint(20,20), wxSize(600,450));
frame->Show (TRUE);
SetTopWindow (frame);
return TRUE;
}
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
: wxFrame((wxFrame *)NULL, -1, title, pos, size)
{
m_angle = 0.1;
new MyCanvas(this);
wxMenu *menuFile = new wxMenu;
menuFile->Append (ID_Angle, "Set &angle\tCtrl-A");
menuFile->AppendSeparator();
menuFile->Append (ID_Quit, "E&xit\tAlt-X");
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append (menuFile, "&File");
SetMenuBar (menuBar);
}
void MyFrame::OnAngle (wxCommandEvent &)
{
long degrees = (long)((180*m_angle)/M_PI);
degrees = wxGetNumberFromUser("Change the image rotation angle",
"Angle in degrees:",
"wxWindows rotate sample",
degrees,
-180, +180,
this);
if ( degrees != -1 )
m_angle = (degrees * M_PI) / 180.0;
}
void MyFrame::OnQuit (wxCommandEvent &)
{
Close (TRUE);
}
MyCanvas::MyCanvas(wxWindow* parent):
wxScrolledWindow(parent, -1)
{
SetBackgroundColour (wxColour (0,80,60));
Clear();
}
// Rotate with interpolation and with offset correction
void MyCanvas::OnMouseLeftUp (wxMouseEvent & event)
{
MyFrame* frame = (MyFrame*) GetParent();
wxPoint offset;
const wxImage& img = wxGetApp().GetImage();
wxImage img2 = img.Rotate(frame->m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), TRUE, &offset);
wxBitmap bmp(img2);
wxClientDC dc (this);
dc.DrawBitmap (bmp, event.m_x + offset.x, event.m_y + offset.y, TRUE);
}
// without interpolation, and without offset correction
void MyCanvas::OnMouseRightUp (wxMouseEvent & event)
{
MyFrame* frame = (MyFrame*) GetParent();
const wxImage& img = wxGetApp().GetImage();
wxImage img2 = img.Rotate(frame->m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), FALSE);
wxBitmap bmp(img2);
wxClientDC dc (this);
dc.DrawBitmap (bmp, event.m_x, event.m_y, TRUE);
}