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 // 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/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 void 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 void
 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
 152 // ----------------------------------------------------------------------------
 153 // splitter sash drawing
 154 // ----------------------------------------------------------------------------
 155
 156 // the full sash width (should be even)
 157 static const wxCoord SASH_SIZE = 8;
 158
 159 // margin around the sash
 160 static const wxCoord SASH_MARGIN = 2;
 161
 162 static int GetGtkSplitterFullSize()
 163 {
 164     return SASH_SIZE + SASH_MARGIN;
 165 }
 166
 167 wxSplitterRenderParams
 168 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 169 {
 170     // we don't draw any border, hence 0 for the second field
 171     return wxSplitterRenderParams
 172            (
 173                GetGtkSplitterFullSize(),
 174                0,
 175                false    // not
 176            );
 177 }
 178
 179 void
 180 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 181                                   wxDC& WXUNUSED(dc),
 182                                   const wxRect& WXUNUSED(rect),
 183                                   int WXUNUSED(flags))
 184 {
 185     // nothing to do
 186 }
 187
 188 void
 189 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 190                                 wxDC& WXUNUSED(dc),
 191                                 const wxSize& size,
 192                                 wxCoord position,
 193                                 wxOrientation orient,
 194                                 int WXUNUSED(flags))
 195 {
 196     if ( !win->m_wxwindow->window )
 197     {
 198         // window not realized yet
 199         return;
 200     }
 201
 202     wxCoord full_size = GetGtkSplitterFullSize();
 203
 204     // are we drawing vertical or horizontal splitter?
 205     const bool isVert = orient == wxVERTICAL;
 206
 207     GdkRectangle rect;
 208 #if USE_ERASE_RECT
 209     GdkRectangle erase_rect;
 210 #endif
 211
 212     if ( isVert )
 213     {
 214         int h = win->GetClientSize().GetHeight();
 215
 216         rect.x = position;
 217         rect.y = 0;
 218         rect.width = full_size;
 219         rect.height = h;
 220
 221 #if USE_ERASE_RECT
 222         erase_rect.x = position;
 223         erase_rect.y = 0;
 224         erase_rect.width = full_size;
 225         erase_rect.height = h;
 226 #endif
 227     }
 228     else // horz
 229     {
 230         int w = win->GetClientSize().GetWidth();
 231
 232         rect.x = 0;
 233         rect.y = position;
 234         rect.height = full_size;
 235         rect.width = w;
 236
 237 #if USE_ERASE_RECT
 238         erase_rect.y = position;
 239         erase_rect.x = 0;
 240         erase_rect.height = full_size;
 241         erase_rect.width = w;
 242 #endif
 243     }
 244
 245 #if USE_ERASE_RECT
 246     // we must erase everything first, otherwise the garbage
 247     // from the old sash is left when dragging it
 248     gtk_paint_flat_box
 249     (
 250         win->m_wxwindow->style,
 251         GTK_PIZZA(win->m_wxwindow)->bin_window,
 252         GTK_STATE_NORMAL,
 253         GTK_SHADOW_NONE,
 254         NULL,
 255         win->m_wxwindow,
 256         (char *)"viewportbin", // const_cast
 257         erase_rect.x,
 258         erase_rect.y,
 259         erase_rect.width,
 260         erase_rect.height
 261     );
 262 #endif
 263
 264
 265     // leave some margin before sash itself
 266     position += SASH_MARGIN / 2;
 267
 268     // and finally draw it using GTK paint functions
 269     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 270                                                 GtkStateType,
 271                                                 GdkRectangle *, GtkWidget *,
 272                                                 gchar *,
 273                                                 gint, gint, gint);
 274
 275     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 276
 277     (*func)
 278     (
 279         win->m_wxwindow->style,
 280         GTK_PIZZA(win->m_wxwindow)->bin_window,
 281         GTK_STATE_NORMAL,
 282         NULL,
 283         win->m_wxwindow,
 284         (char *)"paned", // const_cast
 285         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 286     );
 287
 288     gtk_paint_box
 289     (
 290         win->m_wxwindow->style,
 291         GTK_PIZZA(win->m_wxwindow)->bin_window,
 292         GTK_STATE_NORMAL,
 293         GTK_SHADOW_OUT,
 294         NULL,
 295         win->m_wxwindow,
 296         (char *)"paned", // const_cast
 297         isVert ? position : size.x - 2*SASH_SIZE,
 298         isVert ? size.y - 2*SASH_SIZE : position,
 299         SASH_SIZE, SASH_SIZE
 300     );
 301 }
 302
 303 void
 304 wxRendererGTK::DrawDropArrow(wxWindow *WXUNUSED(win),
 305                              wxDC& dc,
 306                              const wxRect& rect,
 307                              int flags)
 308 {
 309     GtkWidget *button = GetButtonWidget();
 310
 311     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 312     // a window for gtk_paint_xxx function, then it won't
 313     // work for wxMemoryDC. So that is why we assume wxDC
 314     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 315     // are derived from it) and use its m_window.
 316     wxWindowDCImpl * const impl = wxDynamicCast(dc.GetImpl(), wxWindowDCImpl);
 317     wxCHECK_RET( impl, "must have a window DC" );
 318
 319     GdkWindow* gdk_window = impl->GetGDKWindow();
 320
 321     // draw arrow so that there is even space horizontally
 322     // on both sides
 323     int arrowX = rect.width/4 + 1;
 324     int arrowWidth = rect.width - (arrowX*2);
 325
 326     // scale arrow's height accoording to the width
 327     int arrowHeight = rect.width/3;
 328     int arrowY = (rect.height-arrowHeight)/2 +
 329                  ((rect.height-arrowHeight) & 1);
 330
 331     GtkStateType state;
 332
 333     if ( flags & wxCONTROL_PRESSED )
 334         state = GTK_STATE_ACTIVE;
 335     else if ( flags & wxCONTROL_DISABLED )
 336         state = GTK_STATE_INSENSITIVE;
 337     else if ( flags & wxCONTROL_CURRENT )
 338         state = GTK_STATE_PRELIGHT;
 339     else
 340         state = GTK_STATE_NORMAL;
 341
 342     // draw arrow on button
 343     gtk_paint_arrow
 344     (
 345         button->style,
 346         gdk_window,
 347         state,
 348         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 349         NULL,
 350         button,
 351         "arrow",
 352         GTK_ARROW_DOWN,
 353         FALSE,
 354         rect.x + arrowX,
 355         rect.y + arrowY,
 356         arrowWidth,
 357         arrowHeight
 358     );
 359 }
 360
 361 void
 362 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 363                                       wxDC& dc,
 364                                       const wxRect& rect,
 365                                       int flags)
 366 {
 367     GtkWidget *button = GetButtonWidget();
 368
 369     // for reason why we do this, see DrawDropArrow
 370     wxWindowDCImpl * const impl = wxDynamicCast(dc.GetImpl(), wxWindowDCImpl);
 371     wxCHECK_RET( impl, "must have a window DC" );
 372
 373     GdkWindow* gdk_window = impl->GetGDKWindow();
 374
 375     // draw button
 376     GtkStateType state;
 377
 378     if ( flags & wxCONTROL_PRESSED )
 379         state = GTK_STATE_ACTIVE;
 380     else if ( flags & wxCONTROL_DISABLED )
 381         state = GTK_STATE_INSENSITIVE;
 382     else if ( flags & wxCONTROL_CURRENT )
 383         state = GTK_STATE_PRELIGHT;
 384     else
 385         state = GTK_STATE_NORMAL;
 386
 387     gtk_paint_box
 388     (
 389         button->style,
 390         gdk_window,
 391         state,
 392         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 393         NULL,
 394         button,
 395         "button",
 396         rect.x, rect.y, rect.width, rect.height
 397     );
 398
 399     // draw arrow on button
 400     DrawDropArrow(win,dc,rect,flags);
 401
 402 }