src/gtk/tglbtn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/tglbtn.cpp
   3 // Purpose:     Definition of the wxToggleButton class, which implements a
   4 //              toggle button under wxGTK.
   5 // Author:      John Norris, minor changes by Axel Schlueter
   6 // Modified by:
   7 // Created:     08.02.01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2000 Johnny C. Norris II
  10 // License:     Rocketeer license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #include "wx/tglbtn.h"
  14
  15 #if wxUSE_TOGGLEBTN
  16
  17 #include <gdk/gdk.h>
  18 #include <gtk/gtk.h>
  19
  20 extern void wxapp_install_idle_handler();
  21 extern bool g_isIdle;
  22 extern bool      g_blockEventsOnDrag;
  23 extern wxCursor   g_globalCursor;
  24
  25 // void gtk_togglebutton_clicked_callback(GtkWidget *widget, wxToggleButton *cb)
  26 // Callback function given to gtk.
  27 void wxToggleButton::gtk_togglebutton_clicked_callback(GtkWidget *WXUNUSED(widget), wxToggleButton *cb)
  28 {
  29    if (g_isIdle)
  30       wxapp_install_idle_handler();
  31
  32    if (!cb->m_hasVMT || g_blockEventsOnDrag)
  33       return;
  34
  35    // Generate a wx event.
  36    wxCommandEvent event(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, cb->GetId());
  37    event.SetInt(cb->GetValue());
  38    event.SetEventObject(cb);
  39    cb->GetEventHandler()->ProcessEvent(event);
  40 }
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxToggleButton, wxControl)
  43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED)
  44
  45 // bool Create(wxWindow *parent, wxWindowID id, const wxString &label,
  46 //             const wxPoint &pos, const wxSize &size, long style,
  47 //             const wxValidator& validator, const wxString &name)
  48 // Create the control.
  49 bool wxToggleButton::Create(wxWindow *parent, wxWindowID id,
  50                             const wxString &label, const wxPoint &pos,
  51                             const wxSize &size, long style,
  52                             const wxValidator& validator,
  53                             const wxString &name)
  54 {
  55    m_needParent = TRUE;
  56    m_acceptsFocus = TRUE;
  57
  58    if (!PreCreation(parent, pos, size) ||
  59        !CreateBase(parent, id, pos, size, style, validator, name )) {
  60       wxFAIL_MSG(wxT("wxToggleButton creation failed"));
  61       return FALSE;
  62    }
  63
  64    wxControl::SetLabel(label);
  65
  66    // Create the gtk widget.
  67    m_widget = gtk_toggle_button_new_with_label(m_label.mbc_str());
  68
  69    gtk_signal_connect(GTK_OBJECT(m_widget), "clicked",
  70                       GTK_SIGNAL_FUNC(gtk_togglebutton_clicked_callback),
  71                       (gpointer *)this);
  72
  73    m_parent->DoAddChild(this);
  74
  75    PostCreation();
  76
  77    SetFont(parent->GetFont());
  78
  79    wxSize size_best(DoGetBestSize());
  80    wxSize new_size(size);
  81    if (new_size.x == -1)
  82       new_size.x = size_best.x;
  83    if (new_size.y == -1)
  84       new_size.y = size_best.y;
  85    if ((new_size.x != size.x) || (new_size.y != size.y))
  86       SetSize(new_size.x, new_size.y);
  87
  88    SetBackgroundColour(parent->GetBackgroundColour());
  89    SetForegroundColour(parent->GetForegroundColour());
  90
  91    Show(TRUE);
  92
  93    return TRUE;
  94 }
  95
  96 // void SetValue(bool state)
  97 // Set the value of the toggle button.
  98 void wxToggleButton::SetValue(bool state)
  99 {
 100    wxCHECK_RET(m_widget != NULL, wxT("invalid toggle button"));
 101
 102    if (state == GetValue())
 103       return;
 104
 105    gtk_signal_disconnect_by_func(GTK_OBJECT(m_widget),
 106                                  GTK_SIGNAL_FUNC(gtk_togglebutton_clicked_callback),
 107                                  (gpointer *)this);
 108
 109    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(m_widget), state);
 110
 111    gtk_signal_connect(GTK_OBJECT(m_widget), "clicked",
 112                       GTK_SIGNAL_FUNC(gtk_togglebutton_clicked_callback),
 113                       (gpointer *)this);
 114 }
 115
 116 // bool GetValue() const
 117 // Get the value of the toggle button.
 118 bool wxToggleButton::GetValue() const
 119 {
 120    wxCHECK_MSG(m_widget != NULL, FALSE, wxT("invalid toggle button"));
 121
 122    return GTK_TOGGLE_BUTTON(m_widget)->active;
 123 }
 124
 125 // void SetLabel(const wxString& label)
 126 // Set the button's label.
 127 void wxToggleButton::SetLabel(const wxString& label)
 128 {
 129    wxCHECK_RET(m_widget != NULL, wxT("invalid toggle button"));
 130
 131    wxControl::SetLabel(label);
 132
 133    gtk_label_set(GTK_LABEL(GTK_BUTTON(m_widget)->child),
 134                  GetLabel().mbc_str());
 135 }
 136
 137 // bool Enable(bool enable)
 138 // Enable (or disable) the control.
 139 bool wxToggleButton::Enable(bool enable /*=TRUE*/)
 140 {
 141    if (!wxControl::Enable(enable))
 142       return FALSE;
 143
 144    gtk_widget_set_sensitive(GTK_BUTTON(m_widget)->child, enable);
 145
 146    return TRUE;
 147 }
 148
 149 // void ApplyWidgetStyle()
 150 // I don't really know what this does.
 151 void wxToggleButton::ApplyWidgetStyle()
 152 {
 153    SetWidgetStyle();
 154    gtk_widget_set_style(m_widget, m_widgetStyle);
 155    gtk_widget_set_style(GTK_BUTTON(m_widget)->child, m_widgetStyle);
 156 }
 157
 158 // bool IsOwnGtkWindow(GdkWindow *window)
 159 // I'm not really sure what this is for, either.
 160 bool wxToggleButton::IsOwnGtkWindow(GdkWindow *window)
 161 {
 162    return (window == GTK_TOGGLE_BUTTON(m_widget)->event_window);
 163 }
 164
 165 // void OnInternalIdle()
 166 // Apparently gtk cursors are difficult to deal with.
 167 void wxToggleButton::OnInternalIdle()
 168 {
 169    wxCursor cursor = m_cursor;
 170    if (g_globalCursor.Ok())
 171       cursor = g_globalCursor;
 172
 173    if (GTK_TOGGLE_BUTTON(m_widget)->event_window && cursor.Ok()) {
 174       /* I now set the cursor the anew in every OnInternalIdle call
 175          as setting the cursor in a parent window also effects the
 176          windows above so that checking for the current cursor is
 177          not possible. */
 178
 179       gdk_window_set_cursor(GTK_TOGGLE_BUTTON(m_widget)->event_window,
 180                             cursor.GetCursor());
 181    }
 182
 183    UpdateWindowUI();
 184 }
 185
 186 // wxSize DoGetBestSize() const
 187 // Get the "best" size for this control.
 188 wxSize wxToggleButton::DoGetBestSize() const
 189 {
 190    wxSize ret(wxControl::DoGetBestSize());
 191    if (ret.x < 80)
 192       ret.x = 80;
 193
 194    return ret;
 195 }
 196
 197 #endif // wxUSE_TOGGLEBTN
 198