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     #include "wx/dcclient.h"
  33 #endif
  34
  35 #include <gtk/gtk.h>
  36 #include "wx/gtk1/win_gtk.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
  56     virtual void DrawSplitterBorder(wxWindow *win,
  57                                     wxDC& dc,
  58                                     const wxRect& rect,
  59                                     int flags = 0);
  60     virtual void DrawSplitterSash(wxWindow *win,
  61                                   wxDC& dc,
  62                                   const wxSize& size,
  63                                   wxCoord position,
  64                                   wxOrientation orient,
  65                                   int flags = 0);
  66
  67     virtual void DrawComboBoxDropButton(wxWindow *win,
  68                                         wxDC& dc,
  69                                         const wxRect& rect,
  70                                         int flags = 0);
  71
  72     virtual void DrawDropArrow(wxWindow *win,
  73                                wxDC& dc,
  74                                const wxRect& rect,
  75                                int flags = 0);
  76
  77     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  78
  79 private:
  80     // FIXME: shouldn't we destroy these windows somewhere?
  81
  82     // used by DrawHeaderButton and DrawComboBoxDropButton
  83     static GtkWidget *GetButtonWidget();
  84 };
  85
  86 // ============================================================================
  87 // implementation
  88 // ============================================================================
  89
  90 /* static */
  91 wxRendererNative& wxRendererNative::GetDefault()
  92 {
  93     static wxRendererGTK s_rendererGTK;
  94
  95     return s_rendererGTK;
  96 }
  97
  98 // ----------------------------------------------------------------------------
  99 // helper functions
 100 // ----------------------------------------------------------------------------
 101
 102 GtkWidget *
 103 wxRendererGTK::GetButtonWidget()
 104 {
 105     static GtkWidget *s_button = NULL;
 106     static GtkWidget *s_window = NULL;
 107
 108     if ( !s_button )
 109     {
 110         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 111         gtk_widget_realize( s_window );
 112         s_button = gtk_button_new();
 113         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 114         gtk_widget_realize( s_button );
 115     }
 116
 117     return s_button;
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // list/tree controls drawing
 122 // ----------------------------------------------------------------------------
 123
 124 void
 125 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 126                                 wxDC& dc,
 127                                 const wxRect& rect,
 128                                 int flags)
 129 {
 130
 131     GtkWidget *button = GetButtonWidget();
 132
 133     gtk_paint_box
 134     (
 135         button->style,
 136         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 137         //   Maybe use code similar as in DrawComboBoxDropButton below?
 138         GTK_PIZZA(win->m_wxwindow)->bin_window,
 139         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 140         GTK_SHADOW_OUT,
 141         NULL,
 142         button,
 143         "button",
 144         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 145     );
 146 }
 147
 148 // ----------------------------------------------------------------------------
 149 // splitter sash drawing
 150 // ----------------------------------------------------------------------------
 151
 152 // the full sash width (should be even)
 153 static const wxCoord SASH_SIZE = 8;
 154
 155 // margin around the sash
 156 static const wxCoord SASH_MARGIN = 2;
 157
 158 static int GetGtkSplitterFullSize()
 159 {
 160     return SASH_SIZE + SASH_MARGIN;
 161 }
 162
 163 wxSplitterRenderParams
 164 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 165 {
 166     // we don't draw any border, hence 0 for the second field
 167     return wxSplitterRenderParams
 168            (
 169                GetGtkSplitterFullSize(),
 170                0,
 171                false    // not
 172            );
 173 }
 174
 175 void
 176 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 177                                   wxDC& WXUNUSED(dc),
 178                                   const wxRect& WXUNUSED(rect),
 179                                   int WXUNUSED(flags))
 180 {
 181     // nothing to do
 182 }
 183
 184 void
 185 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 186                                 wxDC& dc,
 187                                 const wxSize& size,
 188                                 wxCoord position,
 189                                 wxOrientation orient,
 190                                 int WXUNUSED(flags))
 191 {
 192     if ( !win->m_wxwindow->window )
 193     {
 194         // window not realized yet
 195         return;
 196     }
 197
 198     wxCoord full_size = GetGtkSplitterFullSize();
 199
 200     // are we drawing vertical or horizontal splitter?
 201     const bool isVert = orient == wxVERTICAL;
 202
 203     GdkRectangle rect;
 204 #if USE_ERASE_RECT
 205     GdkRectangle erase_rect;
 206 #endif
 207
 208     if ( isVert )
 209     {
 210         int h = win->GetClientSize().GetHeight();
 211
 212         rect.x = position;
 213         rect.y = 0;
 214         rect.width = full_size;
 215         rect.height = h;
 216
 217 #if USE_ERASE_RECT
 218         erase_rect.x = position;
 219         erase_rect.y = 0;
 220         erase_rect.width = full_size;
 221         erase_rect.height = h;
 222 #endif
 223     }
 224     else // horz
 225     {
 226         int w = win->GetClientSize().GetWidth();
 227
 228         rect.x = 0;
 229         rect.y = position;
 230         rect.height = full_size;
 231         rect.width = w;
 232
 233 #if USE_ERASE_RECT
 234         erase_rect.y = position;
 235         erase_rect.x = 0;
 236         erase_rect.height = full_size;
 237         erase_rect.width = w;
 238 #endif
 239     }
 240
 241 #if USE_ERASE_RECT
 242     // we must erase everything first, otherwise the garbage
 243     // from the old sash is left when dragging it
 244     gtk_paint_flat_box
 245     (
 246         win->m_wxwindow->style,
 247         GTK_PIZZA(win->m_wxwindow)->bin_window,
 248         GTK_STATE_NORMAL,
 249         GTK_SHADOW_NONE,
 250         NULL,
 251         win->m_wxwindow,
 252         (char *)"viewportbin", // const_cast
 253         erase_rect.x,
 254         erase_rect.y,
 255         erase_rect.width,
 256         erase_rect.height
 257     );
 258 #endif
 259
 260
 261     // leave some margin before sash itself
 262     position += SASH_MARGIN / 2;
 263
 264     // and finally draw it using GTK paint functions
 265     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 266                                                 GtkStateType,
 267                                                 GdkRectangle *, GtkWidget *,
 268                                                 gchar *,
 269                                                 gint, gint, gint);
 270
 271     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 272
 273     (*func)
 274     (
 275         win->m_wxwindow->style,
 276         GTK_PIZZA(win->m_wxwindow)->bin_window,
 277         GTK_STATE_NORMAL,
 278         NULL,
 279         win->m_wxwindow,
 280         (char *)"paned", // const_cast
 281         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 282     );
 283
 284     gtk_paint_box
 285     (
 286         win->m_wxwindow->style,
 287         GTK_PIZZA(win->m_wxwindow)->bin_window,
 288         GTK_STATE_NORMAL,
 289         GTK_SHADOW_OUT,
 290         (GdkRectangle*) NULL,
 291         win->m_wxwindow,
 292         (char *)"paned", // const_cast
 293         isVert ? position : size.x - 2*SASH_SIZE,
 294         isVert ? size.y - 2*SASH_SIZE : position,
 295         SASH_SIZE, SASH_SIZE
 296     );
 297 }
 298
 299 void
 300 wxRendererGTK::DrawDropArrow(wxWindow *win,
 301                              wxDC& dc,
 302                              const wxRect& rect,
 303                              int flags)
 304 {
 305     GtkWidget *button = GetButtonWidget();
 306
 307     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 308     // a window for gtk_paint_xxx function, then it won't
 309     // work for wxMemoryDC. So that is why we assume wxDC
 310     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 311     // are derived from it) and use its m_window.
 312     GdkWindow* gdk_window = dc.GetGDKWindow();
 313     wxASSERT_MSG( gdk_window,
 314                   wxT("cannot use wxRendererNative on wxDC of this type") );
 315
 316     // draw arrow so that there is even space horizontally
 317     // on both sides
 318     int arrowX = rect.width/4 + 1;
 319     int arrowWidth = rect.width - (arrowX*2);
 320
 321     // scale arrow's height accoording to the width
 322     int arrowHeight = rect.width/3;
 323     int arrowY = (rect.height-arrowHeight)/2 +
 324                  ((rect.height-arrowHeight) & 1);
 325
 326     GtkStateType state;
 327
 328     if ( flags & wxCONTROL_PRESSED )
 329         state = GTK_STATE_ACTIVE;
 330     else if ( flags & wxCONTROL_DISABLED )
 331         state = GTK_STATE_INSENSITIVE;
 332     else if ( flags & wxCONTROL_CURRENT )
 333         state = GTK_STATE_PRELIGHT;
 334     else
 335         state = GTK_STATE_NORMAL;
 336
 337     // draw arrow on button
 338     gtk_paint_arrow
 339     (
 340         button->style,
 341         gdk_window,
 342         state,
 343         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 344         NULL,
 345         button,
 346         "arrow",
 347         GTK_ARROW_DOWN,
 348         FALSE,
 349         rect.x + arrowX,
 350         rect.y + arrowY,
 351         arrowWidth,
 352         arrowHeight
 353     );
 354 }
 355
 356 void
 357 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 358                                       wxDC& dc,
 359                                       const wxRect& rect,
 360                                       int flags)
 361 {
 362     GtkWidget *button = GetButtonWidget();
 363
 364     // for reason why we do this, see DrawDropArrow
 365     GdkWindow* gdk_window = dc.GetGDKWindow();
 366     wxASSERT_MSG( gdk_window,
 367                   wxT("cannot use wxRendererNative on wxDC of this type") );
 368
 369     // draw button
 370     GtkStateType state;
 371
 372     if ( flags & wxCONTROL_PRESSED )
 373         state = GTK_STATE_ACTIVE;
 374     else if ( flags & wxCONTROL_DISABLED )
 375         state = GTK_STATE_INSENSITIVE;
 376     else if ( flags & wxCONTROL_CURRENT )
 377         state = GTK_STATE_PRELIGHT;
 378     else
 379         state = GTK_STATE_NORMAL;
 380
 381     gtk_paint_box
 382     (
 383         button->style,
 384         gdk_window,
 385         state,
 386         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 387         NULL,
 388         button,
 389         "button",
 390         rect.x, rect.y, rect.width, rect.height
 391     );
 392
 393     // draw arrow on button
 394     DrawDropArrow(win,dc,rect,flags);
 395
 396 }