f5ac656c5a
2. added "change angle" to the menu, abort (and not crash) if bitmap not found git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5888 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
149 lines
3.6 KiB
C++
149 lines
3.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: rotate.cpp
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// Purpose: Image rotation test
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// Author: Carlos Moreno
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// Modified by:
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// Created: 6/2/2000
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// RCS-ID: $Id$
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// Copyright: (c) 2000
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/image.h"
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#include <math.h> // M_PI
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class MyApp: public wxApp
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{
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public:
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virtual bool OnInit();
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const wxImage& GetImage() const { return m_image; }
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private:
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wxImage m_image;
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};
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class MyFrame: public wxFrame
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{
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public:
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MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
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void OnQuit (wxCommandEvent &);
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void OnAngle(wxCommandEvent &);
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void OnMouseLeftUp (wxMouseEvent & event);
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void OnMouseRightUp (wxMouseEvent & event);
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private:
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double m_angle;
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DECLARE_EVENT_TABLE()
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};
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enum
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{
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ID_Quit = 1,
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ID_Angle
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};
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU (ID_Quit, MyFrame::OnQuit)
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EVT_MENU (ID_Angle, MyFrame::OnAngle)
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EVT_LEFT_UP (MyFrame::OnMouseLeftUp)
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EVT_RIGHT_UP (MyFrame::OnMouseRightUp)
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END_EVENT_TABLE()
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IMPLEMENT_APP(MyApp)
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bool MyApp::OnInit()
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{
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m_image = wxImage("kclub.bmp", wxBITMAP_TYPE_BMP);
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if ( !m_image.Ok() )
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{
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wxLogError("Can't load the test image, please copy it to the "
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"program directory");
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return FALSE;
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}
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MyFrame *frame = new MyFrame ("wxWindows rotate sample",
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wxPoint(20,20), wxSize(600,450));
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frame->SetBackgroundColour (wxColour (0,80,60));
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frame->Show (TRUE);
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SetTopWindow (frame);
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return TRUE;
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}
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MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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: wxFrame((wxFrame *)NULL, -1, title, pos, size)
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{
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m_angle = 0.1;
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wxMenu *menuFile = new wxMenu;
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menuFile->Append (ID_Angle, "Set &angle\tCtrl-A");
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menuFile->AppendSeparator();
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menuFile->Append (ID_Quit, "E&xit\tAlt-X");
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wxMenuBar *menuBar = new wxMenuBar;
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menuBar->Append (menuFile, "&File");
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SetMenuBar (menuBar);
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}
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void MyFrame::OnAngle (wxCommandEvent &)
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{
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long degrees = (long)((180*m_angle)/M_PI);
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degrees = wxGetNumberFromUser("Change the image rotation angle",
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"Angle in degrees:",
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"wxWindows rotate sample",
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degrees,
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-180, +180,
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this);
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m_angle = (degrees * M_PI) / 180.0;
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}
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void MyFrame::OnQuit (wxCommandEvent &)
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{
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Close (TRUE);
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}
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// Rotate with interpolation and with offset correction
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void MyFrame::OnMouseLeftUp (wxMouseEvent & event)
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{
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wxPoint offset;
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const wxImage& img = wxGetApp().GetImage();
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wxImage img2 = img.Rotate(m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), TRUE, &offset);
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wxBitmap bmp = img2.ConvertToBitmap ();
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wxClientDC dc (this);
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dc.DrawBitmap (img2.ConvertToBitmap(), event.m_x + offset.x, event.m_y + offset.y);
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}
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// without interpolation, and without offset correction
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void MyFrame::OnMouseRightUp (wxMouseEvent & event)
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{
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const wxImage& img = wxGetApp().GetImage();
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wxImage img2 = img.Rotate(m_angle, wxPoint(img.GetWidth()/2, img.GetHeight()/2), FALSE);
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wxBitmap bmp = img2.ConvertToBitmap ();
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wxClientDC dc (this);
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dc.DrawBitmap (bmp, event.m_x, event.m_y);
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}
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