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 wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  83
  84 private:
  85     // used by DrawHeaderButton and DrawComboBoxDropButton
  86     void PrepareButtonDraw();
  87 };
  88
  89 // ============================================================================
  90 // implementation
  91 // ============================================================================
  92
  93 /* static */
  94 wxRendererNative& wxRendererNative::GetDefault()
  95 {
  96     static wxRendererGTK s_rendererGTK;
  97
  98     return s_rendererGTK;
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // common code
 103 // ----------------------------------------------------------------------------
 104
 105 static GtkWidget *gs_button = NULL;
 106 static GtkWidget *gs_window = NULL;
 107
 108 void
 109 wxRendererGTK::PrepareButtonDraw()
 110 {
 111     // prepares gs_button and gs_window which are used when
 112     // drawing button based elements.
 113     wxASSERT ( !gs_button );
 114
 115     gs_window = gtk_window_new( GTK_WINDOW_POPUP );
 116     gtk_widget_realize( gs_window );
 117     gs_button = gtk_button_new();
 118     gtk_container_add( GTK_CONTAINER(gs_window), gs_button );
 119     gtk_widget_realize( gs_button );
 120 }
 121
 122 // ----------------------------------------------------------------------------
 123 // list/tree controls drawing
 124 // ----------------------------------------------------------------------------
 125
 126 void
 127 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 128                                 wxDC& dc,
 129                                 const wxRect& rect,
 130                                 int flags)
 131 {
 132
 133     if (gs_button == NULL)
 134         PrepareButtonDraw();
 135
 136     gtk_paint_box
 137     (
 138         gs_button->style,
 139         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 140         //   Maybe use code similar as in DrawComboBoxDropButton below?
 141         GTK_PIZZA(win->m_wxwindow)->bin_window,
 142         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 143         GTK_SHADOW_OUT,
 144         NULL,
 145         gs_button,
 146         "button",
 147         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 148     );
 149 }
 150
 151 #ifdef __WXGTK20__
 152
 153 // draw a ">" or "v" button
 154 //
 155 // TODO: replace the code below with gtk_paint_expander()
 156 void
 157 wxRendererGTK::DrawTreeItemButton(wxWindow* win,
 158                                   wxDC& dc, const wxRect& rect, int flags)
 159 {
 160 #define PM_SIZE 8
 161
 162     GtkPizza *pizza = GTK_PIZZA( win->m_wxwindow );
 163     GtkStyle *style = win->m_widget->style;
 164     int x = rect.x;
 165     int y = rect.y;
 166     y = dc.LogicalToDeviceY( y );
 167     x = dc.LogicalToDeviceX( x );
 168
 169     // This draws the GTK+ 2.2.4 triangle
 170     x--;
 171     GdkPoint points[3];
 172
 173     if ( flags & wxCONTROL_EXPANDED )
 174     {
 175         points[0].x = x;
 176         points[0].y = y + (PM_SIZE + 2) / 6;
 177         points[1].x = points[0].x + (PM_SIZE + 2);
 178         points[1].y = points[0].y;
 179         points[2].x = (points[0].x + (PM_SIZE + 2) / 2);
 180         points[2].y = y + 2 * (PM_SIZE + 2) / 3;
 181     }
 182     else
 183     {
 184         points[0].x = x + ((PM_SIZE + 2) / 6 + 2);
 185         points[0].y = y - 1;
 186         points[1].x = points[0].x;
 187         points[1].y = points[0].y + (PM_SIZE + 2);
 188         points[2].x = (points[0].x +
 189              (2 * (PM_SIZE + 2) / 3 - 1));
 190         points[2].y = points[0].y + (PM_SIZE + 2) / 2;
 191     }
 192
 193     if ( flags & wxCONTROL_CURRENT )
 194         gdk_draw_polygon( pizza->bin_window, style->fg_gc[GTK_STATE_PRELIGHT], TRUE, points, 3);
 195     else
 196         gdk_draw_polygon( pizza->bin_window, style->base_gc[GTK_STATE_NORMAL], TRUE, points, 3);
 197     gdk_draw_polygon( pizza->bin_window, style->fg_gc[GTK_STATE_NORMAL], FALSE, points, 3 );
 198 }
 199
 200 #endif // __WXGTK20__
 201
 202 // ----------------------------------------------------------------------------
 203 // splitter sash drawing
 204 // ----------------------------------------------------------------------------
 205
 206 // all this should probably be read from the current theme settings somehow?
 207 #ifdef __WXGTK20__
 208     // the full sash size
 209     static const wxCoord SASH_FULL_SIZE = 5;
 210 #else // GTK+ 1.x
 211     // the full sash width (should be even)
 212     static const wxCoord SASH_SIZE = 8;
 213
 214     // margin around the sash
 215     static const wxCoord SASH_MARGIN = 2;
 216
 217     // the full sash size
 218     static const wxCoord SASH_FULL_SIZE = SASH_SIZE + SASH_MARGIN;
 219 #endif // GTK+ 2.x/1.x
 220
 221 wxSplitterRenderParams
 222 wxRendererGTK::GetSplitterParams(const wxWindow * WXUNUSED(win))
 223 {
 224     // we don't draw any border, hence 0 for the second field
 225     return wxSplitterRenderParams
 226            (
 227                SASH_FULL_SIZE,
 228                0,
 229 #ifdef __WXGTK20__
 230                true     // hot sensitive
 231 #else // GTK+ 1.x
 232                false    // not
 233 #endif // GTK+ 2.x/1.x
 234            );
 235 }
 236
 237 void
 238 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 239                                   wxDC& WXUNUSED(dc),
 240                                   const wxRect& WXUNUSED(rect),
 241                                   int WXUNUSED(flags))
 242 {
 243     // nothing to do
 244 }
 245
 246 void
 247 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 248                                 wxDC& dc,
 249                                 const wxSize& size,
 250                                 wxCoord position,
 251                                 wxOrientation orient,
 252                                 int WXUNUSED_IN_GTK1(flags))
 253 {
 254     if ( !win->m_wxwindow->window )
 255     {
 256         // window not realized yet
 257         return;
 258     }
 259
 260     // are we drawing vertical or horizontal splitter?
 261     const bool isVert = orient == wxVERTICAL;
 262
 263     GdkRectangle rect;
 264     GdkRectangle erase_rect;
 265     if ( isVert )
 266     {
 267         int h = win->GetClientSize().GetHeight();
 268
 269         rect.x = position;
 270         rect.y = 0;
 271         rect.width = SASH_FULL_SIZE;
 272         rect.height = h;
 273
 274         erase_rect.x = position;
 275         erase_rect.y = 0;
 276         erase_rect.width = SASH_FULL_SIZE;
 277         erase_rect.height = h;
 278     }
 279     else // horz
 280     {
 281         int w = win->GetClientSize().GetWidth();
 282
 283         rect.x = 0;
 284         rect.y = position;
 285         rect.height = SASH_FULL_SIZE;
 286         rect.width = w;
 287
 288         erase_rect.y = position;
 289         erase_rect.x = 0;
 290         erase_rect.height = SASH_FULL_SIZE;
 291         erase_rect.width = w;
 292     }
 293
 294     // we must erase everything first, otherwise the garbage from the old sash
 295     // is left when dragging it
 296     //
 297     // TODO: is this the right way to draw themed background?
 298     gtk_paint_flat_box
 299     (
 300         win->m_wxwindow->style,
 301         GTK_PIZZA(win->m_wxwindow)->bin_window,
 302         GTK_STATE_NORMAL,
 303         GTK_SHADOW_NONE,
 304         NULL,
 305         win->m_wxwindow,
 306         (char *)"base", // const_cast
 307         erase_rect.x,
 308         erase_rect.y,
 309         erase_rect.width,
 310         erase_rect.height
 311     );
 312
 313 #ifdef __WXGTK20__
 314     gtk_paint_handle
 315     (
 316         win->m_wxwindow->style,
 317         GTK_PIZZA(win->m_wxwindow)->bin_window,
 318         flags & wxCONTROL_CURRENT ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
 319         GTK_SHADOW_NONE,
 320         NULL /* no clipping */,
 321         win->m_wxwindow,
 322         "paned",
 323         rect.x,
 324         rect.y,
 325         rect.width,
 326         rect.height,
 327         !isVert ? GTK_ORIENTATION_VERTICAL : GTK_ORIENTATION_HORIZONTAL
 328     );
 329 #else // GTK+ 1.x
 330
 331     // leave some margin before sash itself
 332     position += SASH_MARGIN / 2;
 333
 334     // and finally draw it using GTK paint functions
 335     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 336                                                 GtkStateType,
 337                                                 GdkRectangle *, GtkWidget *,
 338                                                 gchar *,
 339                                                 gint, gint, gint);
 340
 341     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 342
 343     (*func)
 344     (
 345         win->m_wxwindow->style,
 346         GTK_PIZZA(win->m_wxwindow)->bin_window,
 347         GTK_STATE_NORMAL,
 348         NULL,
 349         win->m_wxwindow,
 350         (char *)"paned", // const_cast
 351         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 352     );
 353
 354     gtk_paint_box
 355     (
 356         win->m_wxwindow->style,
 357         GTK_PIZZA(win->m_wxwindow)->bin_window,
 358         GTK_STATE_NORMAL,
 359         GTK_SHADOW_OUT,
 360         (GdkRectangle*) NULL,
 361         win->m_wxwindow,
 362         (char *)"paned", // const_cast
 363         isVert ? position : size.x - 2*SASH_SIZE,
 364         isVert ? size.y - 2*SASH_SIZE : position,
 365         SASH_SIZE, SASH_SIZE
 366     );
 367 #endif // GTK+ 2.x/1.x
 368 }
 369
 370 void wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 371                                             wxDC& dc,
 372                                             const wxRect& rect,
 373                                             int flags)
 374 {
 375     if (gs_button == NULL)
 376         PrepareButtonDraw();
 377
 378     // device context must inherit from wxWindowDC
 379     // (so it must be wxClientDC, wxMemoryDC or wxPaintDC)
 380     wxWindowDC& wdc = (wxWindowDC&)dc;
 381
 382     // only doing debug-time checking here (it should probably be enough)
 383     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 384
 385     GtkStateType state;
 386
 387     if ( flags & wxCONTROL_CURRENT )
 388         state = GTK_STATE_PRELIGHT;
 389     else if ( flags & wxCONTROL_DISABLED )
 390         state = GTK_STATE_INSENSITIVE;
 391     else
 392         state = GTK_STATE_NORMAL;
 393
 394     // erase background first
 395     gtk_paint_box
 396     (
 397         gs_button->style,
 398         wdc.m_window,
 399         state,
 400         GTK_SHADOW_NONE,
 401         NULL,
 402         gs_button,
 403         "button",
 404         rect.x, rect.y, rect.width, rect.height
 405     );
 406
 407     // draw arrow on button
 408     gtk_paint_arrow
 409     (
 410         gs_button->style,
 411         wdc.m_window,
 412         state,
 413         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 414         NULL,
 415         gs_button,
 416         "arrow",
 417         GTK_ARROW_DOWN,
 418         FALSE,
 419         rect.x + 1, rect.y + 1, rect.width - 2, rect.height - 2
 420     );
 421 }
 422