src/gtk/notebook.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/notebook.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_NOTEBOOK
  14
  15 #include "wx/notebook.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/log.h"
  20     #include "wx/utils.h"
  21     #include "wx/msgdlg.h"
  22     #include "wx/bitmap.h"
  23 #endif
  24
  25 #include "wx/imaglist.h"
  26 #include "wx/fontutil.h"
  27
  28 #include <gtk/gtk.h>
  29 #include "wx/gtk/private.h"
  30 #include "wx/gtk/private/gtk2-compat.h"
  31
  32 //-----------------------------------------------------------------------------
  33 // wxGtkNotebookPage
  34 //-----------------------------------------------------------------------------
  35
  36 // VZ: this is rather ugly as we keep the pages themselves in an array (it
  37 //     allows us to have quite a few functions implemented in the base class)
  38 //     but the page data is kept in a separate list, so we must maintain them
  39 //     in sync manually... of course, the list had been there before the base
  40 //     class which explains it but it still would be nice to do something
  41 //     about this one day
  42
  43 class wxGtkNotebookPage: public wxObject
  44 {
  45 public:
  46     GtkWidget* m_box;
  47     GtkWidget* m_label;
  48     GtkWidget* m_image;
  49     int m_imageIndex;
  50 };
  51
  52
  53 #include "wx/listimpl.cpp"
  54 WX_DEFINE_LIST(wxGtkNotebookPagesList)
  55
  56 extern "C" {
  57 static void event_after(GtkNotebook*, GdkEvent*, wxNotebook*);
  58 }
  59
  60 //-----------------------------------------------------------------------------
  61 // "switch_page"
  62 //-----------------------------------------------------------------------------
  63
  64 extern "C" {
  65 static void
  66 switch_page_after(GtkNotebook* widget, GtkNotebookPage*, guint, wxNotebook* win)
  67 {
  68     g_signal_handlers_block_by_func(widget, (void*)switch_page_after, win);
  69
  70     win->GTKOnPageChanged();
  71 }
  72 }
  73
  74 extern "C" {
  75 static void
  76 switch_page(GtkNotebook* widget, GtkNotebookPage*, int page, wxNotebook* win)
  77 {
  78     win->m_oldSelection = gtk_notebook_get_current_page(widget);
  79
  80     if (win->SendPageChangingEvent(page))
  81         // allow change, unblock handler for changed event
  82         g_signal_handlers_unblock_by_func(widget, (void*)switch_page_after, win);
  83     else
  84         // change vetoed, unblock handler to set selection back
  85         g_signal_handlers_unblock_by_func(widget, (void*)event_after, win);
  86 }
  87 }
  88
  89 //-----------------------------------------------------------------------------
  90 // "event_after" from m_widget
  91 //-----------------------------------------------------------------------------
  92
  93 extern "C" {
  94 static void event_after(GtkNotebook* widget, GdkEvent*, wxNotebook* win)
  95 {
  96     g_signal_handlers_block_by_func(widget, (void*)event_after, win);
  97     g_signal_handlers_block_by_func(widget, (void*)switch_page, win);
  98
  99     // restore previous selection
 100     gtk_notebook_set_current_page(widget, win->m_oldSelection);
 101
 102     g_signal_handlers_unblock_by_func(widget, (void*)switch_page, win);
 103 }
 104 }
 105
 106 //-----------------------------------------------------------------------------
 107 // InsertChild callback for wxNotebook
 108 //-----------------------------------------------------------------------------
 109
 110 void wxNotebook::AddChildGTK(wxWindowGTK* child)
 111 {
 112     // Hack Alert! (Part I): This sets the notebook as the parent of the child
 113     // widget, and takes care of some details such as updating the state and
 114     // style of the child to reflect its new location.  We do this early
 115     // because without it GetBestSize (which is used to set the initial size
 116     // of controls if an explicit size is not given) will often report
 117     // incorrect sizes since the widget's style context is not fully known.
 118     // See bug #901694 for details
 119     // (http://sourceforge.net/tracker/?func=detail&aid=901694&group_id=9863&atid=109863)
 120     gtk_widget_set_parent(child->m_widget, m_widget);
 121
 122     // NOTE: This should be considered a temporary workaround until we can
 123     // work out the details and implement delaying the setting of the initial
 124     // size of widgets until the size is really needed.
 125 }
 126
 127 //-----------------------------------------------------------------------------
 128 // wxNotebook
 129 //-----------------------------------------------------------------------------
 130
 131 BEGIN_EVENT_TABLE(wxNotebook, wxBookCtrlBase)
 132     EVT_NAVIGATION_KEY(wxNotebook::OnNavigationKey)
 133 END_EVENT_TABLE()
 134
 135 void wxNotebook::Init()
 136 {
 137     m_padding = 0;
 138     m_oldSelection = -1;
 139     m_themeEnabled = true;
 140 }
 141
 142 wxNotebook::wxNotebook()
 143 {
 144     Init();
 145 }
 146
 147 wxNotebook::wxNotebook( wxWindow *parent, wxWindowID id,
 148       const wxPoint& pos, const wxSize& size,
 149       long style, const wxString& name )
 150 {
 151     Init();
 152     Create( parent, id, pos, size, style, name );
 153 }
 154
 155 wxNotebook::~wxNotebook()
 156 {
 157     DeleteAllPages();
 158 }
 159
 160 bool wxNotebook::Create(wxWindow *parent, wxWindowID id,
 161                         const wxPoint& pos, const wxSize& size,
 162                         long style, const wxString& name )
 163 {
 164     if ( (style & wxBK_ALIGN_MASK) == wxBK_DEFAULT )
 165         style |= wxBK_TOP;
 166
 167     if (!PreCreation( parent, pos, size ) ||
 168         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 169     {
 170         wxFAIL_MSG( wxT("wxNoteBook creation failed") );
 171         return false;
 172     }
 173
 174
 175     m_widget = gtk_notebook_new();
 176     g_object_ref(m_widget);
 177
 178     gtk_notebook_set_scrollable( GTK_NOTEBOOK(m_widget), 1 );
 179
 180     g_signal_connect (m_widget, "switch_page",
 181                       G_CALLBACK(switch_page), this);
 182
 183     g_signal_connect_after (m_widget, "switch_page",
 184                       G_CALLBACK(switch_page_after), this);
 185     g_signal_handlers_block_by_func(m_widget, (void*)switch_page_after, this);
 186
 187     g_signal_connect(m_widget, "event_after", G_CALLBACK(event_after), this);
 188     g_signal_handlers_block_by_func(m_widget, (void*)event_after, this);
 189
 190     m_parent->DoAddChild( this );
 191
 192     if (m_windowStyle & wxBK_RIGHT)
 193         gtk_notebook_set_tab_pos( GTK_NOTEBOOK(m_widget), GTK_POS_RIGHT );
 194     if (m_windowStyle & wxBK_LEFT)
 195         gtk_notebook_set_tab_pos( GTK_NOTEBOOK(m_widget), GTK_POS_LEFT );
 196     if (m_windowStyle & wxBK_BOTTOM)
 197         gtk_notebook_set_tab_pos( GTK_NOTEBOOK(m_widget), GTK_POS_BOTTOM );
 198
 199     PostCreation(size);
 200
 201     return true;
 202 }
 203
 204 int wxNotebook::GetSelection() const
 205 {
 206     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid notebook") );
 207
 208     return gtk_notebook_get_current_page( GTK_NOTEBOOK(m_widget) );
 209 }
 210
 211 wxString wxNotebook::GetPageText( size_t page ) const
 212 {
 213     wxCHECK_MSG(page < GetPageCount(), wxEmptyString, "invalid notebook index");
 214
 215     GtkLabel* label = GTK_LABEL(GetNotebookPage(page)->m_label);
 216     return wxGTK_CONV_BACK(gtk_label_get_text(label));
 217 }
 218
 219 int wxNotebook::GetPageImage( size_t page ) const
 220 {
 221     wxCHECK_MSG(page < GetPageCount(), wxNOT_FOUND, "invalid notebook index");
 222
 223     return GetNotebookPage(page)->m_imageIndex;
 224 }
 225
 226 wxGtkNotebookPage* wxNotebook::GetNotebookPage( int page ) const
 227 {
 228     return m_pagesData.Item(page)->GetData();
 229 }
 230
 231 int wxNotebook::DoSetSelection( size_t page, int flags )
 232 {
 233     wxCHECK_MSG(page < GetPageCount(), wxNOT_FOUND, "invalid notebook index");
 234
 235     int selOld = GetSelection();
 236
 237     if ( !(flags & SetSelection_SendEvent) )
 238     {
 239         g_signal_handlers_block_by_func(m_widget, (void*)switch_page, this);
 240     }
 241
 242     gtk_notebook_set_current_page( GTK_NOTEBOOK(m_widget), page );
 243
 244     if ( !(flags & SetSelection_SendEvent) )
 245     {
 246         g_signal_handlers_unblock_by_func(m_widget, (void*)switch_page, this);
 247     }
 248
 249     m_selection = page;
 250
 251     wxNotebookPage *client = GetPage(page);
 252     if ( client )
 253         client->SetFocus();
 254
 255     return selOld;
 256 }
 257
 258 void wxNotebook::GTKOnPageChanged()
 259 {
 260     m_selection = gtk_notebook_get_current_page(GTK_NOTEBOOK(m_widget));
 261
 262     SendPageChangedEvent(m_oldSelection);
 263 }
 264
 265 bool wxNotebook::SetPageText( size_t page, const wxString &text )
 266 {
 267     wxCHECK_MSG(page < GetPageCount(), false, "invalid notebook index");
 268
 269     GtkLabel* label = GTK_LABEL(GetNotebookPage(page)->m_label);
 270     gtk_label_set_text(label, wxGTK_CONV(text));
 271
 272     return true;
 273 }
 274
 275 bool wxNotebook::SetPageImage( size_t page, int image )
 276 {
 277     wxCHECK_MSG(page < GetPageCount(), false, "invalid notebook index");
 278
 279     wxGtkNotebookPage* pageData = GetNotebookPage(page);
 280     if (image >= 0)
 281     {
 282         wxCHECK_MSG(HasImageList(), false, "invalid notebook imagelist");
 283         const wxBitmap* bitmap = GetImageList()->GetBitmapPtr(image);
 284         if (bitmap == NULL)
 285             return false;
 286         if (pageData->m_image)
 287         {
 288             gtk_image_set_from_pixbuf(
 289                 GTK_IMAGE(pageData->m_image), bitmap->GetPixbuf());
 290         }
 291         else
 292         {
 293             pageData->m_image = gtk_image_new_from_pixbuf(bitmap->GetPixbuf());
 294             gtk_widget_show(pageData->m_image);
 295             gtk_box_pack_start(GTK_BOX(pageData->m_box),
 296                 pageData->m_image, false, false, m_padding);
 297         }
 298     }
 299     else if (pageData->m_image)
 300     {
 301         gtk_widget_destroy(pageData->m_image);
 302         pageData->m_image = NULL;
 303     }
 304     pageData->m_imageIndex = image;
 305
 306     return true;
 307 }
 308
 309 wxSize wxNotebook::CalcSizeFromPage(const wxSize& sizePage) const
 310 {
 311     // Compute the max size of the tab labels.
 312     wxSize sizeTabMax;
 313     const size_t pageCount = GetPageCount();
 314     for ( size_t n = 0; n < pageCount; n++ )
 315     {
 316         GtkRequisition req;
 317         gtk_widget_get_preferred_size(GetNotebookPage(n)->m_box, NULL, &req);
 318         sizeTabMax.IncTo(wxSize(req.width, req.height));
 319     }
 320
 321     // Unfortunately this doesn't account for the real tab size and I don't
 322     // know how to find it, e.g. where do the margins below come from.
 323     const int PAGE_MARGIN = 3;
 324     const int TAB_MARGIN = 4;
 325
 326     sizeTabMax.IncBy(3*TAB_MARGIN);
 327
 328     wxSize sizeFull(sizePage);
 329     if ( IsVertical() )
 330         sizeFull.y += sizeTabMax.y;
 331     else
 332         sizeFull.x += sizeTabMax.x;
 333
 334     sizeFull.IncBy(2*PAGE_MARGIN);
 335
 336     return sizeFull;
 337 }
 338
 339 void wxNotebook::SetPadding( const wxSize &padding )
 340 {
 341     wxCHECK_RET( m_widget != NULL, wxT("invalid notebook") );
 342
 343     m_padding = padding.GetWidth();
 344
 345     for (size_t i = GetPageCount(); i--;)
 346     {
 347         wxGtkNotebookPage* pageData = GetNotebookPage(i);
 348         if (pageData->m_image)
 349         {
 350             gtk_box_set_child_packing(GTK_BOX(pageData->m_box),
 351                 pageData->m_image, false, false, m_padding, GTK_PACK_START);
 352         }
 353         gtk_box_set_child_packing(GTK_BOX(pageData->m_box),
 354             pageData->m_label, false, false, m_padding, GTK_PACK_END);
 355     }
 356 }
 357
 358 void wxNotebook::SetTabSize(const wxSize& WXUNUSED(sz))
 359 {
 360     wxFAIL_MSG( wxT("wxNotebook::SetTabSize not implemented") );
 361 }
 362
 363 bool wxNotebook::DeleteAllPages()
 364 {
 365     for (size_t i = GetPageCount(); i--;)
 366         DeletePage(i);
 367
 368     return wxNotebookBase::DeleteAllPages();
 369 }
 370
 371 wxNotebookPage *wxNotebook::DoRemovePage( size_t page )
 372 {
 373     // We cannot remove the page yet, as GTK sends the "switch_page"
 374     // signal before it has removed the notebook-page from its
 375     // corresponding list. Thus, if we were to remove the page from
 376     // m_pages at this point, the two lists of pages would be out
 377     // of sync during the PAGE_CHANGING/PAGE_CHANGED events.
 378     wxNotebookPage *client = GetPage(page);
 379     if ( !client )
 380         return NULL;
 381
 382     // we don't need to unparent the client->m_widget; GTK+ will do
 383     // that for us (and will throw a warning if we do it!)
 384     gtk_notebook_remove_page( GTK_NOTEBOOK(m_widget), page );
 385
 386     // It's safe to remove the page now.
 387     wxASSERT_MSG(GetPage(page) == client, wxT("pages changed during delete"));
 388     wxNotebookBase::DoRemovePage(page);
 389
 390     wxGtkNotebookPage* p = GetNotebookPage(page);
 391     m_pagesData.DeleteObject(p);
 392     delete p;
 393
 394     return client;
 395 }
 396
 397 bool wxNotebook::InsertPage( size_t position,
 398                              wxNotebookPage* win,
 399                              const wxString& text,
 400                              bool select,
 401                              int imageId )
 402 {
 403     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid notebook") );
 404
 405     wxCHECK_MSG( win->GetParent() == this, false,
 406                wxT("Can't add a page whose parent is not the notebook!") );
 407
 408     wxCHECK_MSG( position <= GetPageCount(), false,
 409                  wxT("invalid page index in wxNotebookPage::InsertPage()") );
 410
 411     // Hack Alert! (Part II): See above in wxNotebook::AddChildGTK
 412     // why this has to be done.
 413     gtk_widget_unparent(win->m_widget);
 414
 415     if (m_themeEnabled)
 416         win->SetThemeEnabled(true);
 417
 418     GtkNotebook *notebook = GTK_NOTEBOOK(m_widget);
 419
 420     wxGtkNotebookPage* pageData = new wxGtkNotebookPage;
 421
 422     m_pages.Insert(win, position);
 423     m_pagesData.Insert(position, pageData);
 424
 425     // set the label image and text
 426     // this must be done before adding the page, as GetPageText
 427     // and GetPageImage will otherwise return wrong values in
 428     // the page-changed event that results from inserting the
 429     // first page.
 430     pageData->m_imageIndex = imageId;
 431
 432     pageData->m_box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 1);
 433     gtk_container_set_border_width(GTK_CONTAINER(pageData->m_box), 2);
 434
 435     pageData->m_image = NULL;
 436     if (imageId != -1)
 437     {
 438         if (HasImageList())
 439         {
 440             const wxBitmap* bitmap = GetImageList()->GetBitmapPtr(imageId);
 441             pageData->m_image = gtk_image_new_from_pixbuf(bitmap->GetPixbuf());
 442             gtk_box_pack_start(GTK_BOX(pageData->m_box),
 443                 pageData->m_image, false, false, m_padding);
 444         }
 445         else
 446         {
 447             wxFAIL_MSG("invalid notebook imagelist");
 448         }
 449     }
 450
 451     /* set the label text */
 452     pageData->m_label = gtk_label_new(wxGTK_CONV(wxStripMenuCodes(text)));
 453     gtk_box_pack_end(GTK_BOX(pageData->m_box),
 454         pageData->m_label, false, false, m_padding);
 455
 456     gtk_widget_show_all(pageData->m_box);
 457     gtk_notebook_insert_page(notebook, win->m_widget, pageData->m_box, position);
 458
 459     /* apply current style */
 460 #ifdef __WXGTK3__
 461     GTKApplyStyle(pageData->m_label, NULL);
 462 #else
 463     GtkRcStyle *style = GTKCreateWidgetStyle();
 464     if ( style )
 465     {
 466         gtk_widget_modify_style(pageData->m_label, style);
 467         g_object_unref(style);
 468     }
 469 #endif
 470
 471     if (select && GetPageCount() > 1)
 472     {
 473         SetSelection( position );
 474     }
 475
 476     InvalidateBestSize();
 477     return true;
 478 }
 479
 480 // helper for HitTest(): check if the point lies inside the given widget which
 481 // is the child of the notebook whose position and border size are passed as
 482 // parameters
 483 static bool
 484 IsPointInsideWidget(const wxPoint& pt, GtkWidget *w,
 485                     gint x, gint y, gint border = 0)
 486 {
 487     GtkAllocation a;
 488     gtk_widget_get_allocation(w, &a);
 489     return
 490         (pt.x >= a.x - x - border) &&
 491         (pt.x <= a.x - x + border + a.width) &&
 492         (pt.y >= a.y - y - border) &&
 493         (pt.y <= a.y - y + border + a.height);
 494 }
 495
 496 int wxNotebook::HitTest(const wxPoint& pt, long *flags) const
 497 {
 498     GtkAllocation a;
 499     gtk_widget_get_allocation(m_widget, &a);
 500     const int x = a.x;
 501     const int y = a.y;
 502
 503     const size_t count = GetPageCount();
 504     size_t i = 0;
 505
 506 #ifndef __WXGTK3__
 507     GtkNotebook * notebook = GTK_NOTEBOOK(m_widget);
 508     if (gtk_notebook_get_scrollable(notebook))
 509         i = g_list_position( notebook->children, notebook->first_tab );
 510 #endif
 511
 512     for ( ; i < count; i++ )
 513     {
 514         wxGtkNotebookPage* pageData = GetNotebookPage(i);
 515         GtkWidget* box = pageData->m_box;
 516
 517         const gint border = gtk_container_get_border_width(GTK_CONTAINER(box));
 518
 519         if ( IsPointInsideWidget(pt, box, x, y, border) )
 520         {
 521             // ok, we're inside this tab -- now find out where, if needed
 522             if ( flags )
 523             {
 524                 if (pageData->m_image && IsPointInsideWidget(pt, pageData->m_image, x, y))
 525                 {
 526                     *flags = wxBK_HITTEST_ONICON;
 527                 }
 528                 else if (IsPointInsideWidget(pt, pageData->m_label, x, y))
 529                 {
 530                     *flags = wxBK_HITTEST_ONLABEL;
 531                 }
 532                 else
 533                 {
 534                     *flags = wxBK_HITTEST_ONITEM;
 535                 }
 536             }
 537
 538             return i;
 539         }
 540     }
 541
 542     if ( flags )
 543     {
 544         *flags = wxBK_HITTEST_NOWHERE;
 545         wxWindowBase * page = GetCurrentPage();
 546         if ( page )
 547         {
 548             // rect origin is in notebook's parent coordinates
 549             wxRect rect = page->GetRect();
 550
 551             // adjust it to the notebook's coordinates
 552             wxPoint pos = GetPosition();
 553             rect.x -= pos.x;
 554             rect.y -= pos.y;
 555             if ( rect.Contains( pt ) )
 556                 *flags |= wxBK_HITTEST_ONPAGE;
 557         }
 558     }
 559
 560     return wxNOT_FOUND;
 561 }
 562
 563 void wxNotebook::OnNavigationKey(wxNavigationKeyEvent& event)
 564 {
 565     if (event.IsWindowChange())
 566         AdvanceSelection( event.GetDirection() );
 567     else
 568         event.Skip();
 569 }
 570
 571 #if wxUSE_CONSTRAINTS
 572
 573 // override these 2 functions to do nothing: everything is done in OnSize
 574 void wxNotebook::SetConstraintSizes( bool WXUNUSED(recurse) )
 575 {
 576     // don't set the sizes of the pages - their correct size is not yet known
 577     wxControl::SetConstraintSizes(false);
 578 }
 579
 580 bool wxNotebook::DoPhase( int WXUNUSED(nPhase) )
 581 {
 582     return true;
 583 }
 584
 585 #endif
 586
 587 void wxNotebook::DoApplyWidgetStyle(GtkRcStyle *style)
 588 {
 589     GTKApplyStyle(m_widget, style);
 590     for (size_t i = GetPageCount(); i--;)
 591         GTKApplyStyle(GetNotebookPage(i)->m_label, style);
 592 }
 593
 594 GdkWindow *wxNotebook::GTKGetWindow(wxArrayGdkWindows& windows) const
 595 {
 596     windows.push_back(gtk_widget_get_window(m_widget));
 597 #ifdef __WXGTK3__
 598     // no access to internal GdkWindows
 599 #else
 600     windows.push_back(GTK_NOTEBOOK(m_widget)->event_window);
 601 #endif
 602
 603     return NULL;
 604 }
 605
 606 // static
 607 wxVisualAttributes
 608 wxNotebook::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 609 {
 610     return GetDefaultAttributesFromGTKWidget(gtk_notebook_new());
 611 }
 612
 613 #endif