src/gtk/renderer.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #include <gtk/gtk.h>
  29 #include "wx/gtk/win_gtk.h"
  30
  31 #include "wx/window.h"
  32 #include "wx/dc.h"
  33 #include "wx/dcclient.h"
  34
  35 #ifdef __WXGTK20__
  36     #include "wx/settings.h"
  37 #endif // GTK 2.0
  38
  39 #ifdef __WXGTK20__
  40     #define WXUNUSED_IN_GTK1(arg) arg
  41 #else
  42     #define WXUNUSED_IN_GTK1(arg)
  43 #endif
  44
  45 // ----------------------------------------------------------------------------
  46 // wxRendererGTK: our wxRendererNative implementation
  47 // ----------------------------------------------------------------------------
  48
  49 class WXDLLEXPORT wxRendererGTK : public wxDelegateRendererNative
  50 {
  51 public:
  52     // draw the header control button (used by wxListCtrl)
  53     virtual void DrawHeaderButton(wxWindow *win,
  54                                   wxDC& dc,
  55                                   const wxRect& rect,
  56                                   int flags = 0);
  57
  58 #ifdef __WXGTK20__
  59     // draw the expanded/collapsed icon for a tree control item
  60     virtual void DrawTreeItemButton(wxWindow *win,
  61                                     wxDC& dc,
  62                                     const wxRect& rect,
  63                                     int flags = 0);
  64 #endif // GTK+ 2.0
  65
  66     virtual void DrawSplitterBorder(wxWindow *win,
  67                                     wxDC& dc,
  68                                     const wxRect& rect,
  69                                     int flags = 0);
  70     virtual void DrawSplitterSash(wxWindow *win,
  71                                   wxDC& dc,
  72                                   const wxSize& size,
  73                                   wxCoord position,
  74                                   wxOrientation orient,
  75                                   int flags = 0);
  76
  77     virtual void DrawComboBoxDropButton(wxWindow *win,
  78                                         wxDC& dc,
  79                                         const wxRect& rect,
  80                                         int flags = 0);
  81
  82     virtual void DrawDropArrow(wxWindow *win,
  83                                wxDC& dc,
  84                                const wxRect& rect,
  85                                int flags = 0);
  86
  87     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  88
  89 private:
  90     // FIXME: shouldn't we destroy these windows somewhere?
  91
  92     // used by DrawHeaderButton and DrawComboBoxDropButton
  93     static GtkWidget *GetButtonWidget();
  94
  95 #ifdef __WXGTK20__
  96     // used by DrawTreeItemButton()
  97     static GtkWidget *GetTreeWidget();
  98 #endif // GTK+ 2.0
  99 };
 100
 101 // ============================================================================
 102 // implementation
 103 // ============================================================================
 104
 105 /* static */
 106 wxRendererNative& wxRendererNative::GetDefault()
 107 {
 108     static wxRendererGTK s_rendererGTK;
 109
 110     return s_rendererGTK;
 111 }
 112
 113 // ----------------------------------------------------------------------------
 114 // helper functions
 115 // ----------------------------------------------------------------------------
 116
 117 GtkWidget *
 118 wxRendererGTK::GetButtonWidget()
 119 {
 120     static GtkWidget *s_button = NULL;
 121     static GtkWidget *s_window = NULL;
 122
 123     if ( !s_button )
 124     {
 125         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 126         gtk_widget_realize( s_window );
 127         s_button = gtk_button_new();
 128         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 129         gtk_widget_realize( s_button );
 130     }
 131
 132     return s_button;
 133 }
 134
 135 #ifdef __WXGTK20__
 136
 137 GtkWidget *
 138 wxRendererGTK::GetTreeWidget()
 139 {
 140     static GtkWidget *s_tree = NULL;
 141     static GtkWidget *s_window = NULL;
 142
 143     if ( !s_tree )
 144     {
 145         s_tree = gtk_tree_view_new();
 146         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 147         gtk_widget_realize( s_window );
 148         gtk_container_add( GTK_CONTAINER(s_window), s_tree );
 149         gtk_widget_realize( s_tree );
 150     }
 151
 152     return s_tree;
 153 }
 154
 155 #endif // GTK+ 2.0
 156
 157 // ----------------------------------------------------------------------------
 158 // list/tree controls drawing
 159 // ----------------------------------------------------------------------------
 160
 161 void
 162 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 163                                 wxDC& dc,
 164                                 const wxRect& rect,
 165                                 int flags)
 166 {
 167
 168     GtkWidget *button = GetButtonWidget();
 169
 170     gtk_paint_box
 171     (
 172         button->style,
 173         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 174         //   Maybe use code similar as in DrawComboBoxDropButton below?
 175         GTK_PIZZA(win->m_wxwindow)->bin_window,
 176         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 177         GTK_SHADOW_OUT,
 178         NULL,
 179         button,
 180         "button",
 181         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 182     );
 183 }
 184
 185 #ifdef __WXGTK20__
 186
 187 // draw a ">" or "v" button
 188 void
 189 wxRendererGTK::DrawTreeItemButton(wxWindow* win,
 190                                   wxDC& dc, const wxRect& rect, int flags)
 191 {
 192     GtkWidget *tree = GetTreeWidget();
 193
 194     GtkStateType state;
 195     if ( flags & wxCONTROL_CURRENT )
 196         state = GTK_STATE_PRELIGHT;
 197     else
 198         state = GTK_STATE_NORMAL;
 199
 200     // VZ: I don't know how to get the size of the expander so as to centre it
 201     //     in the given rectangle, +2/3 below is just what looks good here...
 202     gtk_paint_expander
 203     (
 204         tree->style,
 205         GTK_PIZZA(win->m_wxwindow)->bin_window,
 206         state,
 207         NULL,
 208         tree,
 209         "treeview",
 210         dc.LogicalToDeviceX(rect.x) + 2,
 211         dc.LogicalToDeviceY(rect.y) + 3,
 212         flags & wxCONTROL_EXPANDED ? GTK_EXPANDER_EXPANDED
 213                                    : GTK_EXPANDER_COLLAPSED
 214     );
 215 }
 216
 217 #endif // GTK+ 2.0
 218
 219 // ----------------------------------------------------------------------------
 220 // splitter sash drawing
 221 // ----------------------------------------------------------------------------
 222
 223 #ifndef __WXGTK20__
 224     // the full sash width (should be even)
 225     static const wxCoord SASH_SIZE = 8;
 226
 227     // margin around the sash
 228     static const wxCoord SASH_MARGIN = 2;
 229 #endif // GTK+ 2.x/1.x
 230
 231 static int GetGtkSplitterFullSize()
 232 {
 233 #ifdef __WXGTK20__
 234     static GtkWidget *s_paned = NULL;
 235     if (s_paned == NULL)
 236         s_paned = gtk_vpaned_new();
 237
 238     gint handle_size;
 239     gtk_widget_style_get (s_paned, "handle_size", &handle_size, NULL);
 240
 241     return handle_size;
 242 #else
 243     return SASH_SIZE + SASH_MARGIN;
 244 #endif
 245 }
 246
 247 wxSplitterRenderParams
 248 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 249 {
 250     // we don't draw any border, hence 0 for the second field
 251     return wxSplitterRenderParams
 252            (
 253                GetGtkSplitterFullSize(),
 254                0,
 255 #ifdef __WXGTK20__
 256                true     // hot sensitive
 257 #else // GTK+ 1.x
 258                false    // not
 259 #endif // GTK+ 2.x/1.x
 260            );
 261 }
 262
 263 void
 264 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 265                                   wxDC& WXUNUSED(dc),
 266                                   const wxRect& WXUNUSED(rect),
 267                                   int WXUNUSED(flags))
 268 {
 269     // nothing to do
 270 }
 271
 272 void
 273 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 274                                 wxDC& dc,
 275                                 const wxSize& size,
 276                                 wxCoord position,
 277                                 wxOrientation orient,
 278                                 int WXUNUSED_IN_GTK1(flags))
 279 {
 280     if ( !win->m_wxwindow->window )
 281     {
 282         // window not realized yet
 283         return;
 284     }
 285
 286     wxCoord full_size = GetGtkSplitterFullSize();
 287
 288     // are we drawing vertical or horizontal splitter?
 289     const bool isVert = orient == wxVERTICAL;
 290
 291     GdkRectangle rect;
 292     GdkRectangle erase_rect;
 293     if ( isVert )
 294     {
 295         int h = win->GetClientSize().GetHeight();
 296
 297         rect.x = position;
 298         rect.y = 0;
 299         rect.width = full_size;
 300         rect.height = h;
 301
 302         erase_rect.x = position;
 303         erase_rect.y = 0;
 304         erase_rect.width = full_size;
 305         erase_rect.height = h;
 306     }
 307     else // horz
 308     {
 309         int w = win->GetClientSize().GetWidth();
 310
 311         rect.x = 0;
 312         rect.y = position;
 313         rect.height = full_size;
 314         rect.width = w;
 315
 316         erase_rect.y = position;
 317         erase_rect.x = 0;
 318         erase_rect.height = full_size;
 319         erase_rect.width = w;
 320     }
 321
 322 #if 0
 323     // RR: After a correction to the orientation of the sash
 324     //     this doesn't seem to be required anymore and it
 325     //     seems to confuse some themes
 326
 327     // we must erase everything first, otherwise the garbage
 328     // from the old sash is left when dragging it
 329     gtk_paint_flat_box
 330     (
 331         win->m_wxwindow->style,
 332         GTK_PIZZA(win->m_wxwindow)->bin_window,
 333         GTK_STATE_NORMAL,
 334         GTK_SHADOW_NONE,
 335         NULL,
 336         win->m_wxwindow,
 337         (char *)"viewportbin", // const_cast
 338         erase_rect.x,
 339         erase_rect.y,
 340         erase_rect.width,
 341         erase_rect.height
 342     );
 343 #endif
 344
 345 #ifdef __WXGTK20__
 346     gtk_paint_handle
 347     (
 348         win->m_wxwindow->style,
 349         GTK_PIZZA(win->m_wxwindow)->bin_window,
 350         flags & wxCONTROL_CURRENT ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
 351         GTK_SHADOW_NONE,
 352         NULL /* no clipping */,
 353         win->m_wxwindow,
 354         "paned",
 355         rect.x,
 356         rect.y,
 357         rect.width,
 358         rect.height,
 359         isVert ? GTK_ORIENTATION_VERTICAL : GTK_ORIENTATION_HORIZONTAL
 360     );
 361 #else // GTK+ 1.x
 362
 363     // leave some margin before sash itself
 364     position += SASH_MARGIN / 2;
 365
 366     // and finally draw it using GTK paint functions
 367     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 368                                                 GtkStateType,
 369                                                 GdkRectangle *, GtkWidget *,
 370                                                 gchar *,
 371                                                 gint, gint, gint);
 372
 373     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 374
 375     (*func)
 376     (
 377         win->m_wxwindow->style,
 378         GTK_PIZZA(win->m_wxwindow)->bin_window,
 379         GTK_STATE_NORMAL,
 380         NULL,
 381         win->m_wxwindow,
 382         (char *)"paned", // const_cast
 383         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 384     );
 385
 386     gtk_paint_box
 387     (
 388         win->m_wxwindow->style,
 389         GTK_PIZZA(win->m_wxwindow)->bin_window,
 390         GTK_STATE_NORMAL,
 391         GTK_SHADOW_OUT,
 392         (GdkRectangle*) NULL,
 393         win->m_wxwindow,
 394         (char *)"paned", // const_cast
 395         isVert ? position : size.x - 2*SASH_SIZE,
 396         isVert ? size.y - 2*SASH_SIZE : position,
 397         SASH_SIZE, SASH_SIZE
 398     );
 399 #endif // GTK+ 2.x/1.x
 400 }
 401
 402 void
 403 wxRendererGTK::DrawDropArrow(wxWindow *win,
 404                              wxDC& dc,
 405                              const wxRect& rect,
 406                              int flags)
 407 {
 408     GtkWidget *button = GetButtonWidget();
 409
 410     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 411     // a window for gtk_paint_xxx function, then it won't
 412     // work for wxMemoryDC. So that is why we assume wxDC
 413     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 414     // are derived from it) and use its m_window.
 415     wxWindowDC& wdc = (wxWindowDC&)dc;
 416
 417     // only doing debug-time checking here (it should
 418     // probably be enough)
 419     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 420
 421     // draw arrow so that there is even space horizontally
 422     // on both sides
 423     int arrowX = rect.width/4 + 1;
 424     int arrowWidth = rect.width - (arrowX*2);
 425
 426     // scale arrow's height accoording to the width
 427     int arrowHeight = rect.width/3;
 428     int arrowY = (rect.height-arrowHeight)/2 +
 429                  ((rect.height-arrowHeight) & 1);
 430
 431     GtkStateType state;
 432
 433     if ( flags & wxCONTROL_CURRENT )
 434         state = GTK_STATE_PRELIGHT;
 435     else if ( flags & wxCONTROL_DISABLED )
 436         state = GTK_STATE_INSENSITIVE;
 437     else
 438         state = GTK_STATE_NORMAL;
 439
 440     // draw arrow on button
 441     gtk_paint_arrow
 442     (
 443         button->style,
 444         wdc.m_window,
 445         state,
 446         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 447         NULL,
 448         button,
 449         "arrow",
 450         GTK_ARROW_DOWN,
 451         FALSE,
 452         rect.x + arrowX,
 453         rect.y + arrowY,
 454         arrowWidth,
 455         arrowHeight
 456     );
 457 }
 458
 459 void
 460 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 461                                       wxDC& dc,
 462                                       const wxRect& rect,
 463                                       int flags)
 464 {
 465     GtkWidget *button = GetButtonWidget();
 466
 467     // for reason why we do this, see DrawDropArrow
 468     wxWindowDC& wdc = (wxWindowDC&)dc;
 469     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 470
 471     // draw button
 472     GtkStateType state;
 473
 474     if ( flags & wxCONTROL_CURRENT )
 475         state = GTK_STATE_PRELIGHT;
 476     else if ( flags & wxCONTROL_DISABLED )
 477         state = GTK_STATE_INSENSITIVE;
 478     else
 479         state = GTK_STATE_NORMAL;
 480
 481     gtk_paint_box
 482     (
 483         button->style,
 484         wdc.m_window,
 485         state,
 486         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 487         NULL,
 488         button,
 489         "button",
 490         rect.x, rect.y, rect.width, rect.height
 491     );
 492
 493     // draw arrow on button
 494     DrawDropArrow(win,dc,rect,flags);
 495
 496 }
 497