src/MuleGifCtrl.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2004-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 //
   6 // Any parts of this program derived from the xMule, lMule or eMule project,
   7 // or contributed by third-party developers are copyrighted by their
   8 // respective authors.
   9 //
  10 // This program is free software; you can redistribute it and/or modify
  11 // it under the terms of the GNU General Public License as published by
  12 // the Free Software Foundation; either version 2 of the License, or
  13 // (at your option) any later version.
  14 //
  15 // This program is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License
  21 // along with this program; if not, write to the Free Software
  22 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  23 //
  24
  25
  26 #include <wx/mstream.h>
  27 #include <wx/gifdecod.h>
  28 #include <wx/dcbuffer.h>
  29
  30
  31 #include "MuleGifCtrl.h"
  32 #include "Types.h"
  33
  34
  35 BEGIN_EVENT_TABLE(MuleGifCtrl, wxControl)
  36         EVT_TIMER(GIFTIMERID, MuleGifCtrl::OnTimer)
  37         EVT_PAINT(MuleGifCtrl::OnPaint)
  38         EVT_ERASE_BACKGROUND(MuleGifCtrl::OnErase)
  39 END_EVENT_TABLE()
  40
  41 class MuleGIFDecoder : public wxGIFDecoder
  42 {
  43 public:
  44         MuleGIFDecoder()
  45         {
  46                 m_nframe = 0;
  47         }
  48
  49         ~MuleGIFDecoder() { }
  50
  51         void GoFirstFrame() { m_nframe = 0; }
  52         void GoNextFrame() { m_nframe < GetFrameCount() - 1 ? m_nframe++ : m_nframe = 0; }
  53         void GoLastFrame() { m_nframe = GetFrameCount() - 1; }
  54
  55         void ConvertToImage(wxImage* image) { wxGIFDecoder::ConvertToImage(m_nframe, image); }
  56
  57         long GetDelay() { return wxGIFDecoder::GetDelay(m_nframe); }
  58
  59 private:
  60         uint32_t m_nframe;
  61 };
  62
  63 MuleGifCtrl::MuleGifCtrl(
  64         wxWindow *parent,
  65         wxWindowID id,
  66         const wxPoint& pos,
  67         const wxSize& size,
  68         long style,
  69         const wxValidator& validator,
  70         const wxString& name)
  71 :
  72 wxControl(parent, id, pos, size, style, validator, name),
  73 m_decoder(NULL),
  74 m_timer(this, GIFTIMERID)
  75 {
  76 }
  77
  78
  79 MuleGifCtrl::~MuleGifCtrl()
  80 {
  81         m_timer.Stop();
  82         if (m_decoder) {
  83                 delete m_decoder;
  84                 m_decoder = NULL;
  85         }
  86 }
  87
  88
  89 bool MuleGifCtrl::LoadData(const char* data, int size)
  90 {
  91         if (m_decoder) {
  92                 m_timer.Stop();
  93                 delete m_decoder;
  94                 m_decoder = NULL;
  95         }
  96
  97         wxMemoryInputStream stream(data, size);
  98         m_decoder = new MuleGIFDecoder();
  99         if ( m_decoder->LoadGIF(stream) != wxGIF_OK ) {
 100                 delete m_decoder;
 101                 m_decoder = NULL;
 102                 return false;
 103         }
 104
 105         m_decoder->GoFirstFrame();
 106         wxImage frame;
 107         m_decoder->ConvertToImage( &frame );
 108         m_frame = wxBitmap(frame);
 109
 110         return true;
 111 }
 112
 113
 114 void MuleGifCtrl::Start()
 115 {
 116         if (m_decoder && m_decoder->IsAnimation()) {
 117                 m_timer.Stop();
 118                 m_decoder->GoLastFrame();
 119 #if wxCHECK_VERSION(2, 9, 0)
 120                 wxTimerEvent evt(m_timer);
 121 #else
 122                 wxTimerEvent evt;
 123 #endif
 124                 OnTimer(evt);
 125         }
 126 }
 127
 128
 129 void MuleGifCtrl::Stop()
 130 {
 131         m_timer.Stop();
 132 }
 133
 134
 135 wxSize MuleGifCtrl::GetBestSize()
 136 {
 137         return m_decoder->GetAnimationSize();
 138 }
 139
 140
 141 void MuleGifCtrl::OnTimer(wxTimerEvent& WXUNUSED(event))
 142 {
 143         if (m_decoder) {
 144                 if (m_decoder->IsAnimation()) {
 145                         m_decoder->GoNextFrame();
 146                 }
 147
 148                 wxImage frame;
 149                 m_decoder->ConvertToImage(&frame);
 150                 m_frame = wxBitmap(frame);
 151
 152                 Refresh();
 153
 154                 if (m_decoder->IsAnimation()) {
 155                         m_timer.Start(m_decoder->GetDelay(), true);
 156                 }
 157         }
 158 }
 159
 160
 161 void MuleGifCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 162 {
 163         wxBufferedPaintDC dc(this);
 164
 165         wxSize clientsize = GetClientSize();
 166         wxSize gifsize = m_decoder->GetAnimationSize();
 167         int x = (clientsize.GetWidth()-gifsize.GetWidth())/2;
 168         int y = (clientsize.GetHeight()-gifsize.GetHeight())/2;
 169
 170         dc.SetBackground(*(wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID)));
 171         dc.Clear();
 172         dc.DrawBitmap(m_frame, x, y, true);
 173 }
 174
 175
 176 // File_checked_for_headers