src/gtk/renderer.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/renderer.cpp
   3 // Purpose:     implementation of wxRendererNative for wxGTK
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     20.07.2003
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/renderer.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/window.h"
  31     #include "wx/dcclient.h"
  32     #include "wx/settings.h"
  33 #endif
  34
  35 #include <gtk/gtk.h>
  36 #include "wx/gtk/win_gtk.h"
  37
  38 // RR: After a correction to the orientation of the sash
  39 //     this doesn't seem to be required anymore and it
  40 //     seems to confuse some themes so USE_ERASE_RECT=0
  41 #define USE_ERASE_RECT 0
  42
  43 // ----------------------------------------------------------------------------
  44 // wxRendererGTK: our wxRendererNative implementation
  45 // ----------------------------------------------------------------------------
  46
  47 class WXDLLEXPORT wxRendererGTK : public wxDelegateRendererNative
  48 {
  49 public:
  50     // draw the header control button (used by wxListCtrl)
  51     virtual void DrawHeaderButton(wxWindow *win,
  52                                   wxDC& dc,
  53                                   const wxRect& rect,
  54                                   int flags = 0);
  55
  56     // draw the expanded/collapsed icon for a tree control item
  57     virtual void DrawTreeItemButton(wxWindow *win,
  58                                     wxDC& dc,
  59                                     const wxRect& rect,
  60                                     int flags = 0);
  61
  62     virtual void DrawSplitterBorder(wxWindow *win,
  63                                     wxDC& dc,
  64                                     const wxRect& rect,
  65                                     int flags = 0);
  66     virtual void DrawSplitterSash(wxWindow *win,
  67                                   wxDC& dc,
  68                                   const wxSize& size,
  69                                   wxCoord position,
  70                                   wxOrientation orient,
  71                                   int flags = 0);
  72
  73     virtual void DrawComboBoxDropButton(wxWindow *win,
  74                                         wxDC& dc,
  75                                         const wxRect& rect,
  76                                         int flags = 0);
  77
  78     virtual void DrawDropArrow(wxWindow *win,
  79                                wxDC& dc,
  80                                const wxRect& rect,
  81                                int flags = 0);
  82
  83     virtual void DrawCheckBox(wxWindow *win,
  84                               wxDC& dc,
  85                               const wxRect& rect,
  86                               int flags = 0);
  87
  88     virtual void DrawPushButton(wxWindow *win,
  89                                 wxDC& dc,
  90                                 const wxRect& rect,
  91                                 int flags = 0);
  92
  93     virtual void DrawItemSelectionRect(wxWindow *win,
  94                                        wxDC& dc,
  95                                        const wxRect& rect,
  96                                        int flags = 0);
  97
  98     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  99
 100 private:
 101     // FIXME: shouldn't we destroy these windows somewhere?
 102
 103     // used by DrawHeaderButton and DrawPushButton
 104     static GtkWidget *GetButtonWidget();
 105
 106     // used by DrawTreeItemButton()
 107     static GtkWidget *GetTreeWidget();
 108
 109     // used by DrawCheckBox()
 110     static GtkWidget *GetCheckButtonWidget();
 111 };
 112
 113 // ============================================================================
 114 // implementation
 115 // ============================================================================
 116
 117 /* static */
 118 wxRendererNative& wxRendererNative::GetDefault()
 119 {
 120     static wxRendererGTK s_rendererGTK;
 121
 122     return s_rendererGTK;
 123 }
 124
 125 // ----------------------------------------------------------------------------
 126 // helper functions
 127 // ----------------------------------------------------------------------------
 128
 129 GtkWidget *
 130 wxRendererGTK::GetButtonWidget()
 131 {
 132     static GtkWidget *s_button = NULL;
 133     static GtkWidget *s_window = NULL;
 134
 135     if ( !s_button )
 136     {
 137         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 138         gtk_widget_realize( s_window );
 139         s_button = gtk_button_new();
 140         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 141         gtk_widget_realize( s_button );
 142     }
 143
 144     return s_button;
 145 }
 146
 147 GtkWidget *
 148 wxRendererGTK::GetCheckButtonWidget()
 149 {
 150     static GtkWidget *s_button = NULL;
 151     static GtkWidget *s_window = NULL;
 152
 153     if ( !s_button )
 154     {
 155         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 156         gtk_widget_realize( s_window );
 157         s_button = gtk_check_button_new();
 158         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 159         gtk_widget_realize( s_button );
 160     }
 161
 162     return s_button;
 163 }
 164
 165 GtkWidget *
 166 wxRendererGTK::GetTreeWidget()
 167 {
 168     static GtkWidget *s_tree = NULL;
 169     static GtkWidget *s_window = NULL;
 170
 171     if ( !s_tree )
 172     {
 173         s_tree = gtk_tree_view_new();
 174         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 175         gtk_widget_realize( s_window );
 176         gtk_container_add( GTK_CONTAINER(s_window), s_tree );
 177         gtk_widget_realize( s_tree );
 178     }
 179
 180     return s_tree;
 181 }
 182
 183 // ----------------------------------------------------------------------------
 184 // list/tree controls drawing
 185 // ----------------------------------------------------------------------------
 186
 187 void
 188 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 189                                 wxDC& dc,
 190                                 const wxRect& rect,
 191                                 int flags)
 192 {
 193
 194     GtkWidget *button = GetButtonWidget();
 195
 196     gtk_paint_box
 197     (
 198         button->style,
 199         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 200         //   Maybe use code similar as in DrawPushButton below?
 201         GTK_PIZZA(win->m_wxwindow)->bin_window,
 202         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 203         GTK_SHADOW_OUT,
 204         NULL,
 205         button,
 206         "button",
 207         dc.LogicalToDeviceX(rect.x), rect.y, rect.width, rect.height
 208     );
 209 }
 210
 211 // draw a ">" or "v" button
 212 void
 213 wxRendererGTK::DrawTreeItemButton(wxWindow* win,
 214                                   wxDC& dc, const wxRect& rect, int flags)
 215 {
 216     GtkWidget *tree = GetTreeWidget();
 217
 218     GtkStateType state;
 219     if ( flags & wxCONTROL_CURRENT )
 220         state = GTK_STATE_PRELIGHT;
 221     else
 222         state = GTK_STATE_NORMAL;
 223
 224     // VZ: I don't know how to get the size of the expander so as to centre it
 225     //     in the given rectangle, +2/3 below is just what looks good here...
 226     gtk_paint_expander
 227     (
 228         tree->style,
 229         GTK_PIZZA(win->m_wxwindow)->bin_window,
 230         state,
 231         NULL,
 232         tree,
 233         "treeview",
 234         dc.LogicalToDeviceX(rect.x) + 2,
 235         dc.LogicalToDeviceY(rect.y) + 3,
 236         flags & wxCONTROL_EXPANDED ? GTK_EXPANDER_EXPANDED
 237                                    : GTK_EXPANDER_COLLAPSED
 238     );
 239 }
 240
 241
 242 // ----------------------------------------------------------------------------
 243 // splitter sash drawing
 244 // ----------------------------------------------------------------------------
 245
 246 static int GetGtkSplitterFullSize()
 247 {
 248     static GtkWidget *s_paned = NULL;
 249     if (s_paned == NULL)
 250         s_paned = gtk_vpaned_new();
 251
 252     gint handle_size;
 253     gtk_widget_style_get (s_paned, "handle_size", &handle_size, NULL);
 254
 255     return handle_size;
 256 }
 257
 258 wxSplitterRenderParams
 259 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 260 {
 261     // we don't draw any border, hence 0 for the second field
 262     return wxSplitterRenderParams
 263            (
 264                GetGtkSplitterFullSize(),
 265                0,
 266                true     // hot sensitive
 267            );
 268 }
 269
 270 void
 271 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 272                                   wxDC& WXUNUSED(dc),
 273                                   const wxRect& WXUNUSED(rect),
 274                                   int WXUNUSED(flags))
 275 {
 276     // nothing to do
 277 }
 278
 279 void
 280 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 281                                 wxDC& dc,
 282                                 const wxSize& size,
 283                                 wxCoord position,
 284                                 wxOrientation orient,
 285                                 int flags)
 286 {
 287     if ( !win->m_wxwindow->window )
 288     {
 289         // window not realized yet
 290         return;
 291     }
 292
 293     wxCoord full_size = GetGtkSplitterFullSize();
 294
 295     // are we drawing vertical or horizontal splitter?
 296     const bool isVert = orient == wxVERTICAL;
 297
 298     GdkRectangle rect;
 299 #if USE_ERASE_RECT
 300     GdkRectangle erase_rect;
 301 #endif
 302
 303     if ( isVert )
 304     {
 305         int h = win->GetClientSize().GetHeight();
 306
 307         rect.x = position;
 308         rect.y = 0;
 309         rect.width = full_size;
 310         rect.height = h;
 311
 312 #if USE_ERASE_RECT
 313         erase_rect.x = position;
 314         erase_rect.y = 0;
 315         erase_rect.width = full_size;
 316         erase_rect.height = h;
 317 #endif
 318     }
 319     else // horz
 320     {
 321         int w = win->GetClientSize().GetWidth();
 322
 323         rect.x = 0;
 324         rect.y = position;
 325         rect.height = full_size;
 326         rect.width = w;
 327
 328 #if USE_ERASE_RECT
 329         erase_rect.y = position;
 330         erase_rect.x = 0;
 331         erase_rect.height = full_size;
 332         erase_rect.width = w;
 333 #endif
 334     }
 335
 336 #if USE_ERASE_RECT
 337     // we must erase everything first, otherwise the garbage
 338     // from the old sash is left when dragging it
 339     gtk_paint_flat_box
 340     (
 341         win->m_wxwindow->style,
 342         GTK_PIZZA(win->m_wxwindow)->bin_window,
 343         GTK_STATE_NORMAL,
 344         GTK_SHADOW_NONE,
 345         NULL,
 346         win->m_wxwindow,
 347         (char *)"viewportbin", // const_cast
 348         erase_rect.x,
 349         erase_rect.y,
 350         erase_rect.width,
 351         erase_rect.height
 352     );
 353 #endif
 354
 355     gtk_paint_handle
 356     (
 357         win->m_wxwindow->style,
 358         GTK_PIZZA(win->m_wxwindow)->bin_window,
 359         flags & wxCONTROL_CURRENT ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
 360         GTK_SHADOW_NONE,
 361         NULL /* no clipping */,
 362         win->m_wxwindow,
 363         "paned",
 364         rect.x,
 365         rect.y,
 366         rect.width,
 367         rect.height,
 368         isVert ? GTK_ORIENTATION_VERTICAL : GTK_ORIENTATION_HORIZONTAL
 369     );
 370 }
 371
 372 void
 373 wxRendererGTK::DrawDropArrow(wxWindow *win,
 374                              wxDC& dc,
 375                              const wxRect& rect,
 376                              int flags)
 377 {
 378     GtkWidget *button = GetButtonWidget();
 379
 380     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 381     // a window for gtk_paint_xxx function, then it won't
 382     // work for wxMemoryDC. So that is why we assume wxDC
 383     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 384     // are derived from it) and use its m_window.
 385     wxWindowDC& wdc = (wxWindowDC&)dc;
 386
 387     // only doing debug-time checking here (it should
 388     // probably be enough)
 389     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 390
 391     // draw arrow so that there is even space horizontally
 392     // on both sides
 393     int arrowX = rect.width/4 + 1;
 394     int arrowWidth = rect.width - (arrowX*2);
 395
 396     // scale arrow's height accoording to the width
 397     int arrowHeight = rect.width/3;
 398     int arrowY = (rect.height-arrowHeight)/2 +
 399                  ((rect.height-arrowHeight) & 1);
 400
 401     GtkStateType state;
 402
 403     if ( flags & wxCONTROL_PRESSED )
 404         state = GTK_STATE_ACTIVE;
 405     else if ( flags & wxCONTROL_DISABLED )
 406         state = GTK_STATE_INSENSITIVE;
 407     else if ( flags & wxCONTROL_CURRENT )
 408         state = GTK_STATE_PRELIGHT;
 409     else
 410         state = GTK_STATE_NORMAL;
 411
 412     // draw arrow on button
 413     gtk_paint_arrow
 414     (
 415         button->style,
 416         wdc.m_window,
 417         state,
 418         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 419         NULL,
 420         button,
 421         "arrow",
 422         GTK_ARROW_DOWN,
 423         FALSE,
 424         rect.x + arrowX,
 425         rect.y + arrowY,
 426         arrowWidth,
 427         arrowHeight
 428     );
 429 }
 430
 431 void
 432 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 433                                       wxDC& dc,
 434                                       const wxRect& rect,
 435                                       int flags)
 436 {
 437     DrawPushButton(win,dc,rect,flags);
 438     DrawDropArrow(win,dc,rect);
 439 }
 440
 441 void
 442 wxRendererGTK::DrawCheckBox(wxWindow *win,
 443                             wxDC& dc,
 444                             const wxRect& rect,
 445                             int flags )
 446 {
 447     GtkWidget *button = GetCheckButtonWidget();
 448
 449     // for reason why we do this, see DrawDropArrow
 450     wxWindowDC& wdc = (wxWindowDC&)dc;
 451     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 452
 453     GtkStateType state;
 454
 455     if ( flags & wxCONTROL_PRESSED )
 456         state = GTK_STATE_ACTIVE;
 457     else if ( flags & wxCONTROL_DISABLED )
 458         state = GTK_STATE_INSENSITIVE;
 459     else if ( flags & wxCONTROL_CURRENT )
 460         state = GTK_STATE_PRELIGHT;
 461     else
 462         state = GTK_STATE_NORMAL;
 463
 464     gtk_paint_check
 465     (
 466         button->style,
 467         wdc.m_window,
 468         state,
 469         flags & wxCONTROL_CHECKED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 470         NULL,
 471         button,
 472         "cellcheck",
 473         dc.LogicalToDeviceX(rect.x)+2,
 474         dc.LogicalToDeviceY(rect.y)+3,
 475         13, 13
 476     );
 477 }
 478
 479 void
 480 wxRendererGTK::DrawPushButton(wxWindow *win,
 481                               wxDC& dc,
 482                               const wxRect& rect,
 483                               int flags)
 484 {
 485     GtkWidget *button = GetButtonWidget();
 486
 487     // for reason why we do this, see DrawDropArrow
 488     wxWindowDC& wdc = (wxWindowDC&)dc;
 489     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 490
 491     // draw button
 492     GtkStateType state;
 493
 494     if ( flags & wxCONTROL_PRESSED )
 495         state = GTK_STATE_ACTIVE;
 496     else if ( flags & wxCONTROL_DISABLED )
 497         state = GTK_STATE_INSENSITIVE;
 498     else if ( flags & wxCONTROL_CURRENT )
 499         state = GTK_STATE_PRELIGHT;
 500     else
 501         state = GTK_STATE_NORMAL;
 502
 503     gtk_paint_box
 504     (
 505         button->style,
 506         wdc.m_window,
 507         state,
 508         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 509         NULL,
 510         button,
 511         "button",
 512         rect.x, rect.y, rect.width, rect.height
 513     );
 514 }
 515
 516 void
 517 wxRendererGTK::DrawItemSelectionRect(wxWindow *win,
 518                                      wxDC& dc,
 519                                      const wxRect& rect,
 520                                      int flags )
 521 {
 522     GtkStateType state;
 523     if (flags & wxCONTROL_SELECTED)
 524     {
 525         if (flags & wxCONTROL_FOCUSED)
 526             state = GTK_STATE_SELECTED;
 527         else
 528             state = GTK_STATE_INSENSITIVE;
 529
 530         gtk_paint_flat_box( win->m_wxwindow->style,
 531                         GTK_PIZZA(win->m_wxwindow)->bin_window,
 532                         state,
 533                         GTK_SHADOW_NONE,
 534                         NULL,
 535                         win->m_wxwindow,
 536                         "treeview",
 537                         dc.LogicalToDeviceX(rect.x),
 538                         dc.LogicalToDeviceY(rect.y),
 539                         rect.width,
 540                         rect.height );
 541     }
 542
 543     if (flags & wxCONTROL_CURRENT)
 544     {
 545         dc.SetPen( *wxBLACK_PEN );
 546         dc.SetBrush( *wxTRANSPARENT_BRUSH );
 547         dc.DrawRectangle( rect );
 548     }
 549 }