src/gtk1/renderer.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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 // Licence:     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/dc.h"
  32 #endif
  33
  34 #include <gtk/gtk.h>
  35 #include "wx/gtk1/win_gtk.h"
  36 #include "wx/gtk1/dcclient.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 int DrawHeaderButton(wxWindow *win,
  52                                  wxDC& dc,
  53                                  const wxRect& rect,
  54                                  int flags = 0,
  55                                  wxHeaderSortIconType sortArrow = wxHDR_SORT_ICON_NONE,
  56                                  wxHeaderButtonParams* params=NULL);
  57
  58     virtual void DrawSplitterBorder(wxWindow *win,
  59                                     wxDC& dc,
  60                                     const wxRect& rect,
  61                                     int flags = 0);
  62     virtual void DrawSplitterSash(wxWindow *win,
  63                                   wxDC& dc,
  64                                   const wxSize& size,
  65                                   wxCoord position,
  66                                   wxOrientation orient,
  67                                   int flags = 0);
  68
  69     virtual void DrawComboBoxDropButton(wxWindow *win,
  70                                         wxDC& dc,
  71                                         const wxRect& rect,
  72                                         int flags = 0);
  73
  74     virtual void DrawDropArrow(wxWindow *win,
  75                                wxDC& dc,
  76                                const wxRect& rect,
  77                                int flags = 0);
  78
  79     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  80
  81 private:
  82     // FIXME: shouldn't we destroy these windows somewhere?
  83
  84     // used by DrawHeaderButton and DrawComboBoxDropButton
  85     static GtkWidget *GetButtonWidget();
  86 };
  87
  88 // ============================================================================
  89 // implementation
  90 // ============================================================================
  91
  92 /* static */
  93 wxRendererNative& wxRendererNative::GetDefault()
  94 {
  95     static wxRendererGTK s_rendererGTK;
  96
  97     return s_rendererGTK;
  98 }
  99
 100 // ----------------------------------------------------------------------------
 101 // helper functions
 102 // ----------------------------------------------------------------------------
 103
 104 GtkWidget *
 105 wxRendererGTK::GetButtonWidget()
 106 {
 107     static GtkWidget *s_button = NULL;
 108     static GtkWidget *s_window = NULL;
 109
 110     if ( !s_button )
 111     {
 112         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 113         gtk_widget_realize( s_window );
 114         s_button = gtk_button_new();
 115         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 116         gtk_widget_realize( s_button );
 117     }
 118
 119     return s_button;
 120 }
 121
 122 // ----------------------------------------------------------------------------
 123 // list/tree controls drawing
 124 // ----------------------------------------------------------------------------
 125
 126 int
 127 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 128                                 wxDC& dc,
 129                                 const wxRect& rect,
 130                                 int flags,
 131                                 wxHeaderSortIconType WXUNUSED(sortArrow),
 132                                 wxHeaderButtonParams* WXUNUSED(params))
 133 {
 134
 135     GtkWidget *button = GetButtonWidget();
 136
 137     gtk_paint_box
 138     (
 139         button->style,
 140         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 141         //   Maybe use code similar as in DrawComboBoxDropButton below?
 142         GTK_PIZZA(win->m_wxwindow)->bin_window,
 143         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 144         GTK_SHADOW_OUT,
 145         NULL,
 146         button,
 147         "button",
 148         dc.LogicalToDeviceX(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 149     );
 150
 151     return rect.width + 2;
 152 }
 153
 154 // ----------------------------------------------------------------------------
 155 // splitter sash drawing
 156 // ----------------------------------------------------------------------------
 157
 158 // the full sash width (should be even)
 159 static const wxCoord SASH_SIZE = 8;
 160
 161 // margin around the sash
 162 static const wxCoord SASH_MARGIN = 2;
 163
 164 static int GetGtkSplitterFullSize()
 165 {
 166     return SASH_SIZE + SASH_MARGIN;
 167 }
 168
 169 wxSplitterRenderParams
 170 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 171 {
 172     // we don't draw any border, hence 0 for the second field
 173     return wxSplitterRenderParams
 174            (
 175                GetGtkSplitterFullSize(),
 176                0,
 177                false    // not
 178            );
 179 }
 180
 181 void
 182 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 183                                   wxDC& WXUNUSED(dc),
 184                                   const wxRect& WXUNUSED(rect),
 185                                   int WXUNUSED(flags))
 186 {
 187     // nothing to do
 188 }
 189
 190 void
 191 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 192                                 wxDC& WXUNUSED(dc),
 193                                 const wxSize& size,
 194                                 wxCoord position,
 195                                 wxOrientation orient,
 196                                 int WXUNUSED(flags))
 197 {
 198     if ( !win->m_wxwindow->window )
 199     {
 200         // window not realized yet
 201         return;
 202     }
 203
 204     wxCoord full_size = GetGtkSplitterFullSize();
 205
 206     // are we drawing vertical or horizontal splitter?
 207     const bool isVert = orient == wxVERTICAL;
 208
 209     GdkRectangle rect;
 210 #if USE_ERASE_RECT
 211     GdkRectangle erase_rect;
 212 #endif
 213
 214     if ( isVert )
 215     {
 216         int h = win->GetClientSize().GetHeight();
 217
 218         rect.x = position;
 219         rect.y = 0;
 220         rect.width = full_size;
 221         rect.height = h;
 222
 223 #if USE_ERASE_RECT
 224         erase_rect.x = position;
 225         erase_rect.y = 0;
 226         erase_rect.width = full_size;
 227         erase_rect.height = h;
 228 #endif
 229     }
 230     else // horz
 231     {
 232         int w = win->GetClientSize().GetWidth();
 233
 234         rect.x = 0;
 235         rect.y = position;
 236         rect.height = full_size;
 237         rect.width = w;
 238
 239 #if USE_ERASE_RECT
 240         erase_rect.y = position;
 241         erase_rect.x = 0;
 242         erase_rect.height = full_size;
 243         erase_rect.width = w;
 244 #endif
 245     }
 246
 247 #if USE_ERASE_RECT
 248     // we must erase everything first, otherwise the garbage
 249     // from the old sash is left when dragging it
 250     gtk_paint_flat_box
 251     (
 252         win->m_wxwindow->style,
 253         GTK_PIZZA(win->m_wxwindow)->bin_window,
 254         GTK_STATE_NORMAL,
 255         GTK_SHADOW_NONE,
 256         NULL,
 257         win->m_wxwindow,
 258         (char *)"viewportbin", // const_cast
 259         erase_rect.x,
 260         erase_rect.y,
 261         erase_rect.width,
 262         erase_rect.height
 263     );
 264 #endif
 265
 266
 267     // leave some margin before sash itself
 268     position += SASH_MARGIN / 2;
 269
 270     // and finally draw it using GTK paint functions
 271     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 272                                                 GtkStateType,
 273                                                 GdkRectangle *, GtkWidget *,
 274                                                 gchar *,
 275                                                 gint, gint, gint);
 276
 277     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 278
 279     (*func)
 280     (
 281         win->m_wxwindow->style,
 282         GTK_PIZZA(win->m_wxwindow)->bin_window,
 283         GTK_STATE_NORMAL,
 284         NULL,
 285         win->m_wxwindow,
 286         (char *)"paned", // const_cast
 287         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 288     );
 289
 290     gtk_paint_box
 291     (
 292         win->m_wxwindow->style,
 293         GTK_PIZZA(win->m_wxwindow)->bin_window,
 294         GTK_STATE_NORMAL,
 295         GTK_SHADOW_OUT,
 296         NULL,
 297         win->m_wxwindow,
 298         (char *)"paned", // const_cast
 299         isVert ? position : size.x - 2*SASH_SIZE,
 300         isVert ? size.y - 2*SASH_SIZE : position,
 301         SASH_SIZE, SASH_SIZE
 302     );
 303 }
 304
 305 void
 306 wxRendererGTK::DrawDropArrow(wxWindow *WXUNUSED(win),
 307                              wxDC& dc,
 308                              const wxRect& rect,
 309                              int flags)
 310 {
 311     GtkWidget *button = GetButtonWidget();
 312
 313     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 314     // a window for gtk_paint_xxx function, then it won't
 315     // work for wxMemoryDC. So that is why we assume wxDC
 316     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 317     // are derived from it) and use its m_window.
 318     wxWindowDCImpl * const impl = wxDynamicCast(dc.GetImpl(), wxWindowDCImpl);
 319     wxCHECK_RET( impl, "must have a window DC" );
 320
 321     GdkWindow* gdk_window = impl->GetGDKWindow();
 322
 323     // draw arrow so that there is even space horizontally
 324     // on both sides
 325     int arrowX = rect.width/4 + 1;
 326     int arrowWidth = rect.width - (arrowX*2);
 327
 328     // scale arrow's height accoording to the width
 329     int arrowHeight = rect.width/3;
 330     int arrowY = (rect.height-arrowHeight)/2 +
 331                  ((rect.height-arrowHeight) & 1);
 332
 333     GtkStateType state;
 334
 335     if ( flags & wxCONTROL_PRESSED )
 336         state = GTK_STATE_ACTIVE;
 337     else if ( flags & wxCONTROL_DISABLED )
 338         state = GTK_STATE_INSENSITIVE;
 339     else if ( flags & wxCONTROL_CURRENT )
 340         state = GTK_STATE_PRELIGHT;
 341     else
 342         state = GTK_STATE_NORMAL;
 343
 344     // draw arrow on button
 345     gtk_paint_arrow
 346     (
 347         button->style,
 348         gdk_window,
 349         state,
 350         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 351         NULL,
 352         button,
 353         "arrow",
 354         GTK_ARROW_DOWN,
 355         FALSE,
 356         rect.x + arrowX,
 357         rect.y + arrowY,
 358         arrowWidth,
 359         arrowHeight
 360     );
 361 }
 362
 363 void
 364 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 365                                       wxDC& dc,
 366                                       const wxRect& rect,
 367                                       int flags)
 368 {
 369     GtkWidget *button = GetButtonWidget();
 370
 371     // for reason why we do this, see DrawDropArrow
 372     wxWindowDCImpl * const impl = wxDynamicCast(dc.GetImpl(), wxWindowDCImpl);
 373     wxCHECK_RET( impl, "must have a window DC" );
 374
 375     GdkWindow* gdk_window = impl->GetGDKWindow();
 376
 377     // draw button
 378     GtkStateType state;
 379
 380     if ( flags & wxCONTROL_PRESSED )
 381         state = GTK_STATE_ACTIVE;
 382     else if ( flags & wxCONTROL_DISABLED )
 383         state = GTK_STATE_INSENSITIVE;
 384     else if ( flags & wxCONTROL_CURRENT )
 385         state = GTK_STATE_PRELIGHT;
 386     else
 387         state = GTK_STATE_NORMAL;
 388
 389     gtk_paint_box
 390     (
 391         button->style,
 392         gdk_window,
 393         state,
 394         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 395         NULL,
 396         button,
 397         "button",
 398         rect.x, rect.y, rect.width, rect.height
 399     );
 400
 401     // draw arrow on button
 402     DrawDropArrow(win,dc,rect,flags);
 403
 404 }