1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/button.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // Id: $Id: button.cpp 58188 2009-01-17 20:38:43Z JS $
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #if wxUSE_BUTTON
14
15 #include "wx/button.h"
16
17 #ifndef WX_PRECOMP
18 #include "wx/toplevel.h"
19 #endif
20
21 #include "wx/stockitem.h"
22
23 #include "wx/gtk/private.h"
24 #include "wx/gtk/win_gtk.h"
25
26 //-----------------------------------------------------------------------------
27 // classes
28 //-----------------------------------------------------------------------------
29
30 class wxButton;
31
32 //-----------------------------------------------------------------------------
33 // data
34 //-----------------------------------------------------------------------------
35
36 extern bool g_blockEventsOnDrag;
37
38 //-----------------------------------------------------------------------------
39 // "clicked"
40 //-----------------------------------------------------------------------------
41
42 extern "C" {
gtk_button_clicked_callback(GtkWidget * WXUNUSED (widget),wxButton * button)43 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
44 {
45 if (g_isIdle)
46 wxapp_install_idle_handler();
47
48 if (!button->m_hasVMT) return;
49 if (g_blockEventsOnDrag) return;
50
51 wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
52 event.SetEventObject(button);
53 button->GetEventHandler()->ProcessEvent(event);
54 }
55 }
56
57 //-----------------------------------------------------------------------------
58 // "style_set" from m_widget
59 //-----------------------------------------------------------------------------
60
61 static gint
gtk_button_style_set_callback(GtkWidget * m_widget,GtkStyle * WXUNUSED (style),wxButton * win)62 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
63 {
64 if (g_isIdle)
65 wxapp_install_idle_handler();
66
67 int left_border = 0;
68 int right_border = 0;
69 int top_border = 0;
70 int bottom_border = 0;
71
72 /* the default button has a border around it */
73 if (GTK_WIDGET_CAN_DEFAULT(m_widget))
74 {
75 GtkBorder *default_border = NULL;
76 gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
77 if (default_border)
78 {
79 left_border += default_border->left;
80 right_border += default_border->right;
81 top_border += default_border->top;
82 bottom_border += default_border->bottom;
83 gtk_border_free( default_border );
84 }
85 win->MoveWindow(
86 win->m_x - left_border,
87 win->m_y - top_border,
88 win->m_width + left_border + right_border,
89 win->m_height + top_border + bottom_border);
90 }
91
92 return FALSE;
93 }
94
95 //-----------------------------------------------------------------------------
96 // wxButton
97 //-----------------------------------------------------------------------------
98
IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)99 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
100
101 wxButton::wxButton()
102 {
103 }
104
~wxButton()105 wxButton::~wxButton()
106 {
107 }
108
Create(wxWindow * parent,wxWindowID id,const wxString & label,const wxPoint & pos,const wxSize & size,long style,const wxValidator & validator,const wxString & name)109 bool wxButton::Create( wxWindow *parent, wxWindowID id, const wxString &label,
110 const wxPoint &pos, const wxSize &size,
111 long style, const wxValidator& validator, const wxString &name )
112 {
113 m_needParent = true;
114 m_acceptsFocus = true;
115
116 if (!PreCreation( parent, pos, size ) ||
117 !CreateBase( parent, id, pos, size, style, validator, name ))
118 {
119 wxFAIL_MSG( wxT("wxButton creation failed") );
120 return false;
121 }
122
123 m_widget = gtk_button_new_with_mnemonic("");
124
125 float x_alignment = 0.5;
126 if (HasFlag(wxBU_LEFT))
127 x_alignment = 0.0;
128 else if (HasFlag(wxBU_RIGHT))
129 x_alignment = 1.0;
130
131 float y_alignment = 0.5;
132 if (HasFlag(wxBU_TOP))
133 y_alignment = 0.0;
134 else if (HasFlag(wxBU_BOTTOM))
135 y_alignment = 1.0;
136
137 #ifdef __WXGTK24__
138 if (!gtk_check_version(2,4,0))
139 {
140 gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
141 }
142 else
143 #endif
144 {
145 if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
146 gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
147 x_alignment, y_alignment);
148 }
149
150 SetLabel(label);
151
152 if (style & wxNO_BORDER)
153 gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
154
155 g_signal_connect_after (m_widget, "clicked",
156 G_CALLBACK (gtk_button_clicked_callback),
157 this);
158
159 g_signal_connect_after (m_widget, "style_set",
160 G_CALLBACK (gtk_button_style_set_callback),
161 this);
162
163 m_parent->DoAddChild( this );
164
165 PostCreation(size);
166
167 return true;
168 }
169
170
SetDefault()171 void wxButton::SetDefault()
172 {
173 wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
174 wxCHECK_RET( tlw, _T("button without top level window?") );
175
176 tlw->SetDefaultItem(this);
177
178 GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
179 gtk_widget_grab_default( m_widget );
180
181 // resize for default border
182 gtk_button_style_set_callback( m_widget, NULL, this );
183 }
184
185 /* static */
GetDefaultSize()186 wxSize wxButtonBase::GetDefaultSize()
187 {
188 static wxSize size = wxDefaultSize;
189 if (size == wxDefaultSize)
190 {
191 // NB: Default size of buttons should be same as size of stock
192 // buttons as used in most GTK+ apps. Unfortunately it's a little
193 // tricky to obtain this size: stock button's size may be smaller
194 // than size of button in GtkButtonBox and vice versa,
195 // GtkButtonBox's minimal button size may be smaller than stock
196 // button's size. We have to retrieve both values and combine them.
197
198 GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
199 GtkWidget *box = gtk_hbutton_box_new();
200 GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
201 gtk_container_add(GTK_CONTAINER(box), btn);
202 gtk_container_add(GTK_CONTAINER(wnd), box);
203 GtkRequisition req;
204 gtk_widget_size_request(btn, &req);
205
206 gint minwidth, minheight;
207 gtk_widget_style_get(box,
208 "child-min-width", &minwidth,
209 "child-min-height", &minheight,
210 NULL);
211
212 size.x = wxMax(minwidth, req.width);
213 size.y = wxMax(minheight, req.height);
214
215 gtk_widget_destroy(wnd);
216 }
217 return size;
218 }
219
SetLabel(const wxString & lbl)220 void wxButton::SetLabel( const wxString &lbl )
221 {
222 wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
223
224 wxString label(lbl);
225
226 if (label.empty() && wxIsStockID(m_windowId))
227 label = wxGetStockLabel(m_windowId);
228
229 wxControl::SetLabel(label);
230
231 const wxString labelGTK = GTKConvertMnemonics(label);
232
233 if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
234 {
235 const char *stock = wxGetStockGtkID(m_windowId);
236 if (stock)
237 {
238 gtk_button_set_label(GTK_BUTTON(m_widget), stock);
239 gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
240 return;
241 }
242 }
243
244 gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
245 gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
246
247 ApplyWidgetStyle( false );
248 }
249
Enable(bool enable)250 bool wxButton::Enable( bool enable )
251 {
252 bool isEnabled = IsEnabled();
253
254 if ( !wxControl::Enable( enable ) )
255 return false;
256
257 gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
258
259 if (!isEnabled && enable)
260 wxGtkFixSensitivity(this);
261
262 return true;
263 }
264
GTKGetWindow(wxArrayGdkWindows & WXUNUSED (windows)) const265 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
266 {
267 return GTK_BUTTON(m_widget)->event_window;
268 }
269
DoApplyWidgetStyle(GtkRcStyle * style)270 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
271 {
272 gtk_widget_modify_style(m_widget, style);
273 GtkWidget *child = GTK_BIN(m_widget)->child;
274 gtk_widget_modify_style(child, style);
275
276 // in gtk+ 2.12, in case of button with image, the path to the label is:
277 // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
278 if (GTK_IS_ALIGNMENT (child)) {
279 GtkWidget *box = GTK_BIN(child)->child;
280 if (GTK_IS_BOX (box)) {
281 for (GList* item = GTK_BOX(box)->children; item; item = item->next)
282 {
283 GtkBoxChild* boxChild = wx_static_cast(GtkBoxChild*, item->data);
284 gtk_widget_modify_style(boxChild->widget, style);
285 }
286 }
287 }
288 }
289
DoGetBestSize() const290 wxSize wxButton::DoGetBestSize() const
291 {
292 // the default button in wxGTK is bigger than the other ones because of an
293 // extra border around it, but we don't want to take it into account in
294 // our size calculations (otherwsie the result is visually ugly), so
295 // always return the size of non default button from here
296 const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
297 if ( isDefault )
298 {
299 // temporarily unset default flag
300 GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
301 }
302
303 wxSize ret( wxControl::DoGetBestSize() );
304
305 if ( isDefault )
306 {
307 // set it back again
308 GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
309 }
310
311 if (!HasFlag(wxBU_EXACTFIT))
312 {
313 wxSize defaultSize = GetDefaultSize();
314 if (ret.x < defaultSize.x) ret.x = defaultSize.x;
315 if (ret.y < defaultSize.y) ret.y = defaultSize.y;
316 }
317
318 CacheBestSize(ret);
319 return ret;
320 }
321
322 // static
323 wxVisualAttributes
GetClassDefaultAttributes(wxWindowVariant WXUNUSED (variant))324 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
325 {
326 return GetDefaultAttributesFromGTKWidget(gtk_button_new);
327 }
328
329 #endif // wxUSE_BUTTON
330