1/////////////////////////////////////////////////////////////////////////////
2// Name:        shaped.cpp
3// Purpose:     Shaped Window sample
4// Author:      Robin Dunn
5// Modified by:
6// Created:     28-Mar-2003
7// RCS-ID:      $Id: shaped.cpp 35650 2005-09-23 12:56:45Z MR $
8// Copyright:   (c) Robin Dunn
9// Licence:     wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
20// For compilers that support precompilation, includes "wx/wx.h".
21#include "wx/wxprec.h"
22
23#ifdef __BORLANDC__
24    #pragma hdrstop
25#endif
26
27// for all others, include the necessary headers
28#ifndef WX_PRECOMP
29    #include "wx/app.h"
30    #include "wx/log.h"
31    #include "wx/frame.h"
32    #include "wx/panel.h"
33    #include "wx/stattext.h"
34    #include "wx/menu.h"
35    #include "wx/layout.h"
36    #include "wx/msgdlg.h"
37    #include "wx/image.h"
38#endif
39
40#include "wx/dcclient.h"
41#include "wx/image.h"
42
43// ----------------------------------------------------------------------------
44// private classes
45// ----------------------------------------------------------------------------
46
47// Define a new application type, each program should derive a class from wxApp
48class MyApp : public wxApp
49{
50public:
51    // override base class virtuals
52    // ----------------------------
53
54    // this one is called on application startup and is a good place for the app
55    // initialization (doing it here and not in the ctor allows to have an error
56    // return: if OnInit() returns false, the application terminates)
57    virtual bool OnInit();
58};
59
60
61// Define a new frame type: this is going to be our main frame
62class ShapedFrame : public wxFrame
63{
64public:
65    // ctor(s)
66    ShapedFrame();
67    void SetWindowShape();
68
69    // event handlers (these functions should _not_ be virtual)
70    void OnDoubleClick(wxMouseEvent& evt);
71    void OnLeftDown(wxMouseEvent& evt);
72    void OnLeftUp(wxMouseEvent& evt);
73    void OnMouseMove(wxMouseEvent& evt);
74    void OnExit(wxMouseEvent& evt);
75    void OnPaint(wxPaintEvent& evt);
76    void OnWindowCreate(wxWindowCreateEvent& evt);
77
78private:
79    bool     m_hasShape;
80    wxBitmap m_bmp;
81    wxPoint  m_delta;
82
83    // any class wishing to process wxWidgets events must use this macro
84    DECLARE_EVENT_TABLE()
85};
86
87
88// ----------------------------------------------------------------------------
89// event tables and other macros for wxWidgets
90// ----------------------------------------------------------------------------
91
92// the event tables connect the wxWidgets events with the functions (event
93// handlers) which process them. It can be also done at run-time, but for the
94// simple menu events like this the static method is much simpler.
95BEGIN_EVENT_TABLE(ShapedFrame, wxFrame)
96    EVT_LEFT_DCLICK(ShapedFrame::OnDoubleClick)
97    EVT_LEFT_DOWN(ShapedFrame::OnLeftDown)
98    EVT_LEFT_UP(ShapedFrame::OnLeftUp)
99    EVT_MOTION(ShapedFrame::OnMouseMove)
100    EVT_RIGHT_UP(ShapedFrame::OnExit)
101
102    EVT_PAINT(ShapedFrame::OnPaint)
103
104#ifdef __WXGTK__
105    EVT_WINDOW_CREATE(ShapedFrame::OnWindowCreate)
106#endif
107END_EVENT_TABLE()
108
109
110// Create a new application object: this macro will allow wxWidgets to create
111// the application object during program execution (it's better than using a
112// static object for many reasons) and also declares the accessor function
113// wxGetApp() which will return the reference of the right type (i.e. MyApp and
114// not wxApp)
115IMPLEMENT_APP(MyApp)
116
117// ============================================================================
118// implementation
119// ============================================================================
120
121// ----------------------------------------------------------------------------
122// the application class
123// ----------------------------------------------------------------------------
124
125// `Main program' equivalent: the program execution "starts" here
126bool MyApp::OnInit()
127{
128    wxInitAllImageHandlers();
129
130    // Create the main application window
131    ShapedFrame *frame = new ShapedFrame();
132    frame->Show(true);
133    SetTopWindow(frame);
134
135    // success: wxApp::OnRun() will be called which will enter the main message
136    // loop and the application will run. If we returned false here, the
137    // application would exit immediately.
138    return true;
139}
140
141// ----------------------------------------------------------------------------
142// main frame
143// ----------------------------------------------------------------------------
144
145// frame constructor
146ShapedFrame::ShapedFrame()
147       : wxFrame((wxFrame *)NULL, wxID_ANY, wxEmptyString,
148                  wxDefaultPosition, wxSize(100, 100), //wxDefaultSize,
149                  0
150                  | wxFRAME_SHAPED
151                  | wxSIMPLE_BORDER
152                  | wxFRAME_NO_TASKBAR
153                  | wxSTAY_ON_TOP
154            )
155{
156    m_hasShape = false;
157    m_bmp = wxBitmap(_T("star.png"), wxBITMAP_TYPE_PNG);
158    SetSize(wxSize(m_bmp.GetWidth(), m_bmp.GetHeight()));
159    SetToolTip(wxT("Right-click to exit"));
160
161#ifndef __WXGTK__
162    // On wxGTK we can't do this yet because the window hasn't been created
163    // yet so we wait until the EVT_WINDOW_CREATE event happens.  On wxMSW and
164    // wxMac the window has been created at this point so we go ahead and set
165    // the shape now.
166    SetWindowShape();
167#endif
168}
169
170void ShapedFrame::SetWindowShape()
171{
172    wxRegion region(m_bmp, *wxWHITE);
173    m_hasShape = SetShape(region);
174}
175
176void ShapedFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt))
177{
178    if (m_hasShape)
179    {
180        wxRegion region;
181        SetShape(region);
182        m_hasShape = false;
183    }
184    else
185        SetWindowShape();
186}
187
188void ShapedFrame::OnLeftDown(wxMouseEvent& evt)
189{
190    CaptureMouse();
191    //printf("Mouse captured\n");
192    wxPoint pos = ClientToScreen(evt.GetPosition());
193    wxPoint origin = GetPosition();
194    int dx =  pos.x - origin.x;
195    int dy = pos.y - origin.y;
196    m_delta = wxPoint(dx, dy);
197}
198
199void ShapedFrame::OnLeftUp(wxMouseEvent& WXUNUSED(evt))
200{
201    if (HasCapture())
202    {
203        ReleaseMouse();
204        //printf("Mouse released\n");
205    }
206}
207
208void ShapedFrame::OnMouseMove(wxMouseEvent& evt)
209{
210    wxPoint pt = evt.GetPosition();
211    //printf("x:%d   y:%d\n", pt.x, pt.y);
212    if (evt.Dragging() && evt.LeftIsDown())
213    {
214        wxPoint pos = ClientToScreen(pt);
215        Move(wxPoint(pos.x - m_delta.x, pos.y - m_delta.y));
216    }
217}
218
219void ShapedFrame::OnExit(wxMouseEvent& WXUNUSED(evt))
220{
221    Close();
222}
223
224void ShapedFrame::OnPaint(wxPaintEvent& WXUNUSED(evt))
225{
226    wxPaintDC dc(this);
227    dc.DrawBitmap(m_bmp, 0, 0, true);
228}
229
230void ShapedFrame::OnWindowCreate(wxWindowCreateEvent& WXUNUSED(evt))
231{
232    SetWindowShape();
233}
234
235