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     // FIXME: shouldn't we destroy these windows somewhere?
  86
  87     // used by DrawHeaderButton and DrawComboBoxDropButton
  88     static GtkWidget *GetButtonWidget();
  89
  90 #ifdef __WXGTK20__
  91     // used by DrawTreeItemButton()
  92     static GtkWidget *GetTreeWidget();
  93 #endif // GTK+ 2.0
  94 };
  95
  96 // ============================================================================
  97 // implementation
  98 // ============================================================================
  99
 100 /* static */
 101 wxRendererNative& wxRendererNative::GetDefault()
 102 {
 103     static wxRendererGTK s_rendererGTK;
 104
 105     return s_rendererGTK;
 106 }
 107
 108 // ----------------------------------------------------------------------------
 109 // helper functions
 110 // ----------------------------------------------------------------------------
 111
 112 GtkWidget *
 113 wxRendererGTK::GetButtonWidget()
 114 {
 115     static GtkWidget *s_button = NULL;
 116     static GtkWidget *s_window = NULL;
 117
 118     if ( !s_button )
 119     {
 120         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 121         gtk_widget_realize( s_window );
 122         s_button = gtk_button_new();
 123         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 124         gtk_widget_realize( s_button );
 125     }
 126
 127     return s_button;
 128 }
 129
 130 #ifdef __WXGTK20__
 131
 132 GtkWidget *
 133 wxRendererGTK::GetTreeWidget()
 134 {
 135     static GtkWidget *s_tree = NULL;
 136     static GtkWidget *s_window = NULL;
 137
 138     if ( !s_tree )
 139     {
 140         s_tree = gtk_tree_view_new();
 141         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 142         gtk_widget_realize( s_window );
 143         gtk_container_add( GTK_CONTAINER(s_window), s_tree );
 144         gtk_widget_realize( s_tree );
 145     }
 146
 147     return s_tree;
 148 }
 149
 150 #endif // GTK+ 2.0
 151
 152 // ----------------------------------------------------------------------------
 153 // list/tree controls drawing
 154 // ----------------------------------------------------------------------------
 155
 156 void
 157 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 158                                 wxDC& dc,
 159                                 const wxRect& rect,
 160                                 int flags)
 161 {
 162
 163     GtkWidget *button = GetButtonWidget();
 164
 165     gtk_paint_box
 166     (
 167         button->style,
 168         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 169         //   Maybe use code similar as in DrawComboBoxDropButton below?
 170         GTK_PIZZA(win->m_wxwindow)->bin_window,
 171         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 172         GTK_SHADOW_OUT,
 173         NULL,
 174         button,
 175         "button",
 176         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 177     );
 178 }
 179
 180 #ifdef __WXGTK20__
 181
 182 // draw a ">" or "v" button
 183 void
 184 wxRendererGTK::DrawTreeItemButton(wxWindow* win,
 185                                   wxDC& dc, const wxRect& rect, int flags)
 186 {
 187     GtkWidget *tree = GetTreeWidget();
 188
 189     GtkStateType state;
 190     if ( flags & wxCONTROL_CURRENT )
 191         state = GTK_STATE_PRELIGHT;
 192     else
 193         state = GTK_STATE_NORMAL;
 194
 195     // VZ: I don't know how to get the size of the expander so as to centre it
 196     //     in the given rectangle, +2/3 below is just what looks good here...
 197     gtk_paint_expander
 198     (
 199         tree->style,
 200         GTK_PIZZA(win->m_wxwindow)->bin_window,
 201         state,
 202         NULL,
 203         tree,
 204         "treeview",
 205         dc.LogicalToDeviceX(rect.x) + 2,
 206         dc.LogicalToDeviceY(rect.y) + 3,
 207         flags & wxCONTROL_EXPANDED ? GTK_EXPANDER_EXPANDED
 208                                    : GTK_EXPANDER_COLLAPSED
 209     );
 210 }
 211
 212 #endif // GTK+ 2.0
 213
 214 // ----------------------------------------------------------------------------
 215 // splitter sash drawing
 216 // ----------------------------------------------------------------------------
 217
 218 // all this should probably be read from the current theme settings somehow?
 219 #ifdef __WXGTK20__
 220     // the full sash size
 221     static const wxCoord SASH_FULL_SIZE = 5;
 222 #else // GTK+ 1.x
 223     // the full sash width (should be even)
 224     static const wxCoord SASH_SIZE = 8;
 225
 226     // margin around the sash
 227     static const wxCoord SASH_MARGIN = 2;
 228
 229     // the full sash size
 230     static const wxCoord SASH_FULL_SIZE = SASH_SIZE + SASH_MARGIN;
 231 #endif // GTK+ 2.x/1.x
 232
 233 wxSplitterRenderParams
 234 wxRendererGTK::GetSplitterParams(const wxWindow * WXUNUSED(win))
 235 {
 236     // we don't draw any border, hence 0 for the second field
 237     return wxSplitterRenderParams
 238            (
 239                SASH_FULL_SIZE,
 240                0,
 241 #ifdef __WXGTK20__
 242                true     // hot sensitive
 243 #else // GTK+ 1.x
 244                false    // not
 245 #endif // GTK+ 2.x/1.x
 246            );
 247 }
 248
 249 void
 250 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 251                                   wxDC& WXUNUSED(dc),
 252                                   const wxRect& WXUNUSED(rect),
 253                                   int WXUNUSED(flags))
 254 {
 255     // nothing to do
 256 }
 257
 258 void
 259 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 260                                 wxDC& dc,
 261                                 const wxSize& size,
 262                                 wxCoord position,
 263                                 wxOrientation orient,
 264                                 int WXUNUSED_IN_GTK1(flags))
 265 {
 266     if ( !win->m_wxwindow->window )
 267     {
 268         // window not realized yet
 269         return;
 270     }
 271
 272     // are we drawing vertical or horizontal splitter?
 273     const bool isVert = orient == wxVERTICAL;
 274
 275     GdkRectangle rect;
 276     GdkRectangle erase_rect;
 277     if ( isVert )
 278     {
 279         int h = win->GetClientSize().GetHeight();
 280
 281         rect.x = position;
 282         rect.y = 0;
 283         rect.width = SASH_FULL_SIZE;
 284         rect.height = h;
 285
 286         erase_rect.x = position;
 287         erase_rect.y = 0;
 288         erase_rect.width = SASH_FULL_SIZE;
 289         erase_rect.height = h;
 290     }
 291     else // horz
 292     {
 293         int w = win->GetClientSize().GetWidth();
 294
 295         rect.x = 0;
 296         rect.y = position;
 297         rect.height = SASH_FULL_SIZE;
 298         rect.width = w;
 299
 300         erase_rect.y = position;
 301         erase_rect.x = 0;
 302         erase_rect.height = SASH_FULL_SIZE;
 303         erase_rect.width = w;
 304     }
 305
 306     // we must erase everything first, otherwise the garbage from the old sash
 307     // is left when dragging it
 308     //
 309     // TODO: is this the right way to draw themed background?
 310     gtk_paint_flat_box
 311     (
 312         win->m_wxwindow->style,
 313         GTK_PIZZA(win->m_wxwindow)->bin_window,
 314         GTK_STATE_NORMAL,
 315         GTK_SHADOW_NONE,
 316         NULL,
 317         win->m_wxwindow,
 318         (char *)"base", // const_cast
 319         erase_rect.x,
 320         erase_rect.y,
 321         erase_rect.width,
 322         erase_rect.height
 323     );
 324
 325 #ifdef __WXGTK20__
 326     gtk_paint_handle
 327     (
 328         win->m_wxwindow->style,
 329         GTK_PIZZA(win->m_wxwindow)->bin_window,
 330         flags & wxCONTROL_CURRENT ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
 331         GTK_SHADOW_NONE,
 332         NULL /* no clipping */,
 333         win->m_wxwindow,
 334         "paned",
 335         rect.x,
 336         rect.y,
 337         rect.width,
 338         rect.height,
 339         !isVert ? GTK_ORIENTATION_VERTICAL : GTK_ORIENTATION_HORIZONTAL
 340     );
 341 #else // GTK+ 1.x
 342
 343     // leave some margin before sash itself
 344     position += SASH_MARGIN / 2;
 345
 346     // and finally draw it using GTK paint functions
 347     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 348                                                 GtkStateType,
 349                                                 GdkRectangle *, GtkWidget *,
 350                                                 gchar *,
 351                                                 gint, gint, gint);
 352
 353     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 354
 355     (*func)
 356     (
 357         win->m_wxwindow->style,
 358         GTK_PIZZA(win->m_wxwindow)->bin_window,
 359         GTK_STATE_NORMAL,
 360         NULL,
 361         win->m_wxwindow,
 362         (char *)"paned", // const_cast
 363         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 364     );
 365
 366     gtk_paint_box
 367     (
 368         win->m_wxwindow->style,
 369         GTK_PIZZA(win->m_wxwindow)->bin_window,
 370         GTK_STATE_NORMAL,
 371         GTK_SHADOW_OUT,
 372         (GdkRectangle*) NULL,
 373         win->m_wxwindow,
 374         (char *)"paned", // const_cast
 375         isVert ? position : size.x - 2*SASH_SIZE,
 376         isVert ? size.y - 2*SASH_SIZE : position,
 377         SASH_SIZE, SASH_SIZE
 378     );
 379 #endif // GTK+ 2.x/1.x
 380 }
 381
 382 void wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 383                                             wxDC& dc,
 384                                             const wxRect& rect,
 385                                             int flags)
 386 {
 387     GtkWidget *button = GetButtonWidget();
 388
 389     // device context must inherit from wxWindowDC
 390     // (so it must be wxClientDC, wxMemoryDC or wxPaintDC)
 391     wxWindowDC& wdc = (wxWindowDC&)dc;
 392
 393     // only doing debug-time checking here (it should probably be enough)
 394     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 395
 396     GtkStateType state;
 397
 398     if ( flags & wxCONTROL_CURRENT )
 399         state = GTK_STATE_PRELIGHT;
 400     else if ( flags & wxCONTROL_DISABLED )
 401         state = GTK_STATE_INSENSITIVE;
 402     else
 403         state = GTK_STATE_NORMAL;
 404
 405     // draw arrow on button
 406     gtk_paint_arrow
 407     (
 408         button->style,
 409         wdc.m_window,
 410         state,
 411         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 412         NULL,
 413         button,
 414         "arrow",
 415         GTK_ARROW_DOWN,
 416         FALSE,
 417         rect.x + 1, rect.y + 1, rect.width - 2, rect.height - 2
 418     );
 419 }
 420