desktop/src/PNGButton.cc

   1 ///
   2 /// \file       PNGButton.cc
   3 ///             Class for turning a set of PNG images into buttons
   4 ///
   5
   6 /*
   7     Copyright (C) 2009-2012, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #include "PNGButton.h"
  23 #include "barrydesktop.h"
  24
  25 //////////////////////////////////////////////////////////////////////////////
  26 // PNGButton
  27
  28 PNGButton::PNGButton(wxWindow *parent, int ID, int x, int y, bool enabled)
  29         : m_parent(parent)
  30         , m_id(ID)
  31         , m_x(x)
  32         , m_y(y)
  33         , m_state(0)
  34         , m_enabled(enabled)
  35 {
  36         // normal[0]
  37         m_bitmaps[BUTTON_STATE_NORMAL] = LoadButtonBitmap(BUTTON_STATE_NORMAL);
  38
  39         // focus[1]
  40         m_bitmaps[BUTTON_STATE_FOCUS] = LoadButtonBitmap(BUTTON_STATE_FOCUS);
  41
  42         // pushed[2]
  43         m_bitmaps[BUTTON_STATE_PUSHED] = LoadButtonBitmap(BUTTON_STATE_PUSHED);
  44 }
  45
  46 wxBitmap PNGButton::LoadButtonBitmap(int state)
  47 {
  48         wxString file = GetButtonFilename(m_id, state);
  49         wxImage image(file);
  50         wxBitmap bmp(image);
  51         if( !image.IsOk() || !bmp.IsOk() ) {
  52                 wxGetApp().Yield();
  53                 throw std::runtime_error("Cannot load button bitmap.");
  54         }
  55         return bmp;
  56 }
  57
  58 void PNGButton::Init(wxDC &dc)
  59 {
  60         int width = m_bitmaps[BUTTON_STATE_NORMAL].GetWidth();
  61         int height = m_bitmaps[BUTTON_STATE_NORMAL].GetHeight();
  62
  63         m_background = wxBitmap(width, height);
  64
  65         wxMemoryDC grab_dc;
  66         grab_dc.SelectObject(m_background);
  67         grab_dc.Blit(0, 0, width, height, &dc, m_x, m_y, wxCOPY, false);
  68 }
  69
  70 void PNGButton::Draw(wxDC &dc)
  71 {
  72         dc.DrawBitmap(m_background, m_x, m_y, false);
  73         dc.DrawBitmap(m_bitmaps[m_state], m_x, m_y);
  74 }
  75
  76 void PNGButton::Normal(wxDC &dc)
  77 {
  78         if( !m_enabled )
  79                 return;
  80
  81         m_state = BUTTON_STATE_NORMAL;
  82         Draw(dc);
  83 }
  84
  85 void PNGButton::Focus(wxDC &dc)
  86 {
  87         if( !m_enabled )
  88                 return;
  89
  90         m_state = BUTTON_STATE_FOCUS;
  91         Draw(dc);
  92 }
  93
  94 void PNGButton::Push(wxDC &dc)
  95 {
  96         if( !m_enabled )
  97                 return;
  98
  99         m_state = BUTTON_STATE_PUSHED;
 100         Draw(dc);
 101 }
 102
 103 void PNGButton::Click(wxDC &dc)
 104 {
 105         if( !m_enabled )
 106                 return;
 107
 108         if( IsPushed() ) {
 109                 // return to normal
 110                 m_state = BUTTON_STATE_NORMAL;
 111                 Draw(dc);
 112
 113                 // send the event
 114                 wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, m_id);
 115                 m_parent->GetEventHandler()->ProcessEvent(event);
 116         }
 117 }
 118