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 #endif
  32
  33 #include <gtk/gtk.h>
  34 #include "wx/gtk1/win_gtk.h"
  35
  36 #include "wx/dc.h"
  37 #include "wx/dcclient.h"
  38
  39 // RR: After a correction to the orientation of the sash
  40 //     this doesn't seem to be required anymore and it
  41 //     seems to confuse some themes so USE_ERASE_RECT=0
  42 #define USE_ERASE_RECT 0
  43
  44 // ----------------------------------------------------------------------------
  45 // wxRendererGTK: our wxRendererNative implementation
  46 // ----------------------------------------------------------------------------
  47
  48 class WXDLLEXPORT wxRendererGTK : public wxDelegateRendererNative
  49 {
  50 public:
  51     // draw the header control button (used by wxListCtrl)
  52     virtual void DrawHeaderButton(wxWindow *win,
  53                                   wxDC& dc,
  54                                   const wxRect& rect,
  55                                   int flags = 0);
  56
  57     virtual void DrawSplitterBorder(wxWindow *win,
  58                                     wxDC& dc,
  59                                     const wxRect& rect,
  60                                     int flags = 0);
  61     virtual void DrawSplitterSash(wxWindow *win,
  62                                   wxDC& dc,
  63                                   const wxSize& size,
  64                                   wxCoord position,
  65                                   wxOrientation orient,
  66                                   int flags = 0);
  67
  68     virtual void DrawComboBoxDropButton(wxWindow *win,
  69                                         wxDC& dc,
  70                                         const wxRect& rect,
  71                                         int flags = 0);
  72
  73     virtual void DrawDropArrow(wxWindow *win,
  74                                wxDC& dc,
  75                                const wxRect& rect,
  76                                int flags = 0);
  77
  78     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  79
  80 private:
  81     // FIXME: shouldn't we destroy these windows somewhere?
  82
  83     // used by DrawHeaderButton and DrawComboBoxDropButton
  84     static GtkWidget *GetButtonWidget();
  85 };
  86
  87 // ============================================================================
  88 // implementation
  89 // ============================================================================
  90
  91 /* static */
  92 wxRendererNative& wxRendererNative::GetDefault()
  93 {
  94     static wxRendererGTK s_rendererGTK;
  95
  96     return s_rendererGTK;
  97 }
  98
  99 // ----------------------------------------------------------------------------
 100 // helper functions
 101 // ----------------------------------------------------------------------------
 102
 103 GtkWidget *
 104 wxRendererGTK::GetButtonWidget()
 105 {
 106     static GtkWidget *s_button = NULL;
 107     static GtkWidget *s_window = NULL;
 108
 109     if ( !s_button )
 110     {
 111         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 112         gtk_widget_realize( s_window );
 113         s_button = gtk_button_new();
 114         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 115         gtk_widget_realize( s_button );
 116     }
 117
 118     return s_button;
 119 }
 120
 121 // ----------------------------------------------------------------------------
 122 // list/tree controls drawing
 123 // ----------------------------------------------------------------------------
 124
 125 void
 126 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 127                                 wxDC& dc,
 128                                 const wxRect& rect,
 129                                 int flags)
 130 {
 131
 132     GtkWidget *button = GetButtonWidget();
 133
 134     gtk_paint_box
 135     (
 136         button->style,
 137         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 138         //   Maybe use code similar as in DrawComboBoxDropButton below?
 139         GTK_PIZZA(win->m_wxwindow)->bin_window,
 140         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 141         GTK_SHADOW_OUT,
 142         NULL,
 143         button,
 144         "button",
 145         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 146     );
 147 }
 148
 149 // ----------------------------------------------------------------------------
 150 // splitter sash drawing
 151 // ----------------------------------------------------------------------------
 152
 153 // the full sash width (should be even)
 154 static const wxCoord SASH_SIZE = 8;
 155
 156 // margin around the sash
 157 static const wxCoord SASH_MARGIN = 2;
 158
 159 static int GetGtkSplitterFullSize()
 160 {
 161     return SASH_SIZE + SASH_MARGIN;
 162 }
 163
 164 wxSplitterRenderParams
 165 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 166 {
 167     // we don't draw any border, hence 0 for the second field
 168     return wxSplitterRenderParams
 169            (
 170                GetGtkSplitterFullSize(),
 171                0,
 172                false    // not
 173            );
 174 }
 175
 176 void
 177 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 178                                   wxDC& WXUNUSED(dc),
 179                                   const wxRect& WXUNUSED(rect),
 180                                   int WXUNUSED(flags))
 181 {
 182     // nothing to do
 183 }
 184
 185 void
 186 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 187                                 wxDC& dc,
 188                                 const wxSize& size,
 189                                 wxCoord position,
 190                                 wxOrientation orient,
 191                                 int WXUNUSED(flags))
 192 {
 193     if ( !win->m_wxwindow->window )
 194     {
 195         // window not realized yet
 196         return;
 197     }
 198
 199     wxCoord full_size = GetGtkSplitterFullSize();
 200
 201     // are we drawing vertical or horizontal splitter?
 202     const bool isVert = orient == wxVERTICAL;
 203
 204     GdkRectangle rect;
 205 #if USE_ERASE_RECT
 206     GdkRectangle erase_rect;
 207 #endif
 208
 209     if ( isVert )
 210     {
 211         int h = win->GetClientSize().GetHeight();
 212
 213         rect.x = position;
 214         rect.y = 0;
 215         rect.width = full_size;
 216         rect.height = h;
 217
 218 #if USE_ERASE_RECT
 219         erase_rect.x = position;
 220         erase_rect.y = 0;
 221         erase_rect.width = full_size;
 222         erase_rect.height = h;
 223 #endif
 224     }
 225     else // horz
 226     {
 227         int w = win->GetClientSize().GetWidth();
 228
 229         rect.x = 0;
 230         rect.y = position;
 231         rect.height = full_size;
 232         rect.width = w;
 233
 234 #if USE_ERASE_RECT
 235         erase_rect.y = position;
 236         erase_rect.x = 0;
 237         erase_rect.height = full_size;
 238         erase_rect.width = w;
 239 #endif
 240     }
 241
 242 #if USE_ERASE_RECT
 243     // we must erase everything first, otherwise the garbage
 244     // from the old sash is left when dragging it
 245     gtk_paint_flat_box
 246     (
 247         win->m_wxwindow->style,
 248         GTK_PIZZA(win->m_wxwindow)->bin_window,
 249         GTK_STATE_NORMAL,
 250         GTK_SHADOW_NONE,
 251         NULL,
 252         win->m_wxwindow,
 253         (char *)"viewportbin", // const_cast
 254         erase_rect.x,
 255         erase_rect.y,
 256         erase_rect.width,
 257         erase_rect.height
 258     );
 259 #endif
 260
 261
 262     // leave some margin before sash itself
 263     position += SASH_MARGIN / 2;
 264
 265     // and finally draw it using GTK paint functions
 266     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 267                                                 GtkStateType,
 268                                                 GdkRectangle *, GtkWidget *,
 269                                                 gchar *,
 270                                                 gint, gint, gint);
 271
 272     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 273
 274     (*func)
 275     (
 276         win->m_wxwindow->style,
 277         GTK_PIZZA(win->m_wxwindow)->bin_window,
 278         GTK_STATE_NORMAL,
 279         NULL,
 280         win->m_wxwindow,
 281         (char *)"paned", // const_cast
 282         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 283     );
 284
 285     gtk_paint_box
 286     (
 287         win->m_wxwindow->style,
 288         GTK_PIZZA(win->m_wxwindow)->bin_window,
 289         GTK_STATE_NORMAL,
 290         GTK_SHADOW_OUT,
 291         (GdkRectangle*) NULL,
 292         win->m_wxwindow,
 293         (char *)"paned", // const_cast
 294         isVert ? position : size.x - 2*SASH_SIZE,
 295         isVert ? size.y - 2*SASH_SIZE : position,
 296         SASH_SIZE, SASH_SIZE
 297     );
 298 }
 299
 300 void
 301 wxRendererGTK::DrawDropArrow(wxWindow *win,
 302                              wxDC& dc,
 303                              const wxRect& rect,
 304                              int flags)
 305 {
 306     GtkWidget *button = GetButtonWidget();
 307
 308     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 309     // a window for gtk_paint_xxx function, then it won't
 310     // work for wxMemoryDC. So that is why we assume wxDC
 311     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 312     // are derived from it) and use its m_window.
 313     wxWindowDC& wdc = (wxWindowDC&)dc;
 314
 315     // only doing debug-time checking here (it should
 316     // probably be enough)
 317     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 318
 319     // draw arrow so that there is even space horizontally
 320     // on both sides
 321     int arrowX = rect.width/4 + 1;
 322     int arrowWidth = rect.width - (arrowX*2);
 323
 324     // scale arrow's height accoording to the width
 325     int arrowHeight = rect.width/3;
 326     int arrowY = (rect.height-arrowHeight)/2 +
 327                  ((rect.height-arrowHeight) & 1);
 328
 329     GtkStateType state;
 330
 331     if ( flags & wxCONTROL_PRESSED )
 332         state = GTK_STATE_ACTIVE;
 333     else if ( flags & wxCONTROL_DISABLED )
 334         state = GTK_STATE_INSENSITIVE;
 335     else if ( flags & wxCONTROL_CURRENT )
 336         state = GTK_STATE_PRELIGHT;
 337     else
 338         state = GTK_STATE_NORMAL;
 339
 340     // draw arrow on button
 341     gtk_paint_arrow
 342     (
 343         button->style,
 344         wdc.m_window,
 345         state,
 346         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 347         NULL,
 348         button,
 349         "arrow",
 350         GTK_ARROW_DOWN,
 351         FALSE,
 352         rect.x + arrowX,
 353         rect.y + arrowY,
 354         arrowWidth,
 355         arrowHeight
 356     );
 357 }
 358
 359 void
 360 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 361                                       wxDC& dc,
 362                                       const wxRect& rect,
 363                                       int flags)
 364 {
 365     GtkWidget *button = GetButtonWidget();
 366
 367     // for reason why we do this, see DrawDropArrow
 368     wxWindowDC& wdc = (wxWindowDC&)dc;
 369     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 370
 371     // draw button
 372     GtkStateType state;
 373
 374     if ( flags & wxCONTROL_PRESSED )
 375         state = GTK_STATE_ACTIVE;
 376     else if ( flags & wxCONTROL_DISABLED )
 377         state = GTK_STATE_INSENSITIVE;
 378     else if ( flags & wxCONTROL_CURRENT )
 379         state = GTK_STATE_PRELIGHT;
 380     else
 381         state = GTK_STATE_NORMAL;
 382
 383     gtk_paint_box
 384     (
 385         button->style,
 386         wdc.m_window,
 387         state,
 388         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 389         NULL,
 390         button,
 391         "button",
 392         rect.x, rect.y, rect.width, rect.height
 393     );
 394
 395     // draw arrow on button
 396     DrawDropArrow(win,dc,rect,flags);
 397
 398 }