src/gtk1/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/gtk1/win_gtk.h"
  30
  31 #include "wx/window.h"
  32 #include "wx/dc.h"
  33 #include "wx/dcclient.h"
  34
  35 // RR: After a correction to the orientation of the sash
  36 //     this doesn't seem to be required anymore and it
  37 //     seems to confuse some themes so USE_ERASE_RECT=0
  38 #define USE_ERASE_RECT 0
  39
  40 // ----------------------------------------------------------------------------
  41 // wxRendererGTK: our wxRendererNative implementation
  42 // ----------------------------------------------------------------------------
  43
  44 class WXDLLEXPORT wxRendererGTK : public wxDelegateRendererNative
  45 {
  46 public:
  47     // draw the header control button (used by wxListCtrl)
  48     virtual void DrawHeaderButton(wxWindow *win,
  49                                   wxDC& dc,
  50                                   const wxRect& rect,
  51                                   int flags = 0);
  52
  53     virtual void DrawSplitterBorder(wxWindow *win,
  54                                     wxDC& dc,
  55                                     const wxRect& rect,
  56                                     int flags = 0);
  57     virtual void DrawSplitterSash(wxWindow *win,
  58                                   wxDC& dc,
  59                                   const wxSize& size,
  60                                   wxCoord position,
  61                                   wxOrientation orient,
  62                                   int flags = 0);
  63
  64     virtual void DrawComboBoxDropButton(wxWindow *win,
  65                                         wxDC& dc,
  66                                         const wxRect& rect,
  67                                         int flags = 0);
  68
  69     virtual void DrawDropArrow(wxWindow *win,
  70                                wxDC& dc,
  71                                const wxRect& rect,
  72                                int flags = 0);
  73
  74     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win);
  75
  76 private:
  77     // FIXME: shouldn't we destroy these windows somewhere?
  78
  79     // used by DrawHeaderButton and DrawComboBoxDropButton
  80     static GtkWidget *GetButtonWidget();
  81 };
  82
  83 // ============================================================================
  84 // implementation
  85 // ============================================================================
  86
  87 /* static */
  88 wxRendererNative& wxRendererNative::GetDefault()
  89 {
  90     static wxRendererGTK s_rendererGTK;
  91
  92     return s_rendererGTK;
  93 }
  94
  95 // ----------------------------------------------------------------------------
  96 // helper functions
  97 // ----------------------------------------------------------------------------
  98
  99 GtkWidget *
 100 wxRendererGTK::GetButtonWidget()
 101 {
 102     static GtkWidget *s_button = NULL;
 103     static GtkWidget *s_window = NULL;
 104
 105     if ( !s_button )
 106     {
 107         s_window = gtk_window_new( GTK_WINDOW_POPUP );
 108         gtk_widget_realize( s_window );
 109         s_button = gtk_button_new();
 110         gtk_container_add( GTK_CONTAINER(s_window), s_button );
 111         gtk_widget_realize( s_button );
 112     }
 113
 114     return s_button;
 115 }
 116
 117 // ----------------------------------------------------------------------------
 118 // list/tree controls drawing
 119 // ----------------------------------------------------------------------------
 120
 121 void
 122 wxRendererGTK::DrawHeaderButton(wxWindow *win,
 123                                 wxDC& dc,
 124                                 const wxRect& rect,
 125                                 int flags)
 126 {
 127
 128     GtkWidget *button = GetButtonWidget();
 129
 130     gtk_paint_box
 131     (
 132         button->style,
 133         // FIXME: I suppose GTK_PIZZA(win->m_wxwindow)->bin_window doesn't work with wxMemoryDC.
 134         //   Maybe use code similar as in DrawComboBoxDropButton below?
 135         GTK_PIZZA(win->m_wxwindow)->bin_window,
 136         flags & wxCONTROL_DISABLED ? GTK_STATE_INSENSITIVE : GTK_STATE_NORMAL,
 137         GTK_SHADOW_OUT,
 138         NULL,
 139         button,
 140         "button",
 141         dc.XLOG2DEV(rect.x) -1, rect.y -1, rect.width +2, rect.height +2
 142     );
 143 }
 144
 145 // ----------------------------------------------------------------------------
 146 // splitter sash drawing
 147 // ----------------------------------------------------------------------------
 148
 149 // the full sash width (should be even)
 150 static const wxCoord SASH_SIZE = 8;
 151
 152 // margin around the sash
 153 static const wxCoord SASH_MARGIN = 2;
 154
 155 static int GetGtkSplitterFullSize()
 156 {
 157     return SASH_SIZE + SASH_MARGIN;
 158 }
 159
 160 wxSplitterRenderParams
 161 wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
 162 {
 163     // we don't draw any border, hence 0 for the second field
 164     return wxSplitterRenderParams
 165            (
 166                GetGtkSplitterFullSize(),
 167                0,
 168                false    // not
 169            );
 170 }
 171
 172 void
 173 wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
 174                                   wxDC& WXUNUSED(dc),
 175                                   const wxRect& WXUNUSED(rect),
 176                                   int WXUNUSED(flags))
 177 {
 178     // nothing to do
 179 }
 180
 181 void
 182 wxRendererGTK::DrawSplitterSash(wxWindow *win,
 183                                 wxDC& dc,
 184                                 const wxSize& size,
 185                                 wxCoord position,
 186                                 wxOrientation orient,
 187                                 int WXUNUSED(flags))
 188 {
 189     if ( !win->m_wxwindow->window )
 190     {
 191         // window not realized yet
 192         return;
 193     }
 194
 195     wxCoord full_size = GetGtkSplitterFullSize();
 196
 197     // are we drawing vertical or horizontal splitter?
 198     const bool isVert = orient == wxVERTICAL;
 199
 200     GdkRectangle rect;
 201 #if USE_ERASE_RECT
 202     GdkRectangle erase_rect;
 203 #endif
 204
 205     if ( isVert )
 206     {
 207         int h = win->GetClientSize().GetHeight();
 208
 209         rect.x = position;
 210         rect.y = 0;
 211         rect.width = full_size;
 212         rect.height = h;
 213
 214 #if USE_ERASE_RECT
 215         erase_rect.x = position;
 216         erase_rect.y = 0;
 217         erase_rect.width = full_size;
 218         erase_rect.height = h;
 219 #endif
 220     }
 221     else // horz
 222     {
 223         int w = win->GetClientSize().GetWidth();
 224
 225         rect.x = 0;
 226         rect.y = position;
 227         rect.height = full_size;
 228         rect.width = w;
 229
 230 #if USE_ERASE_RECT
 231         erase_rect.y = position;
 232         erase_rect.x = 0;
 233         erase_rect.height = full_size;
 234         erase_rect.width = w;
 235 #endif
 236     }
 237
 238 #if USE_ERASE_RECT
 239     // we must erase everything first, otherwise the garbage
 240     // from the old sash is left when dragging it
 241     gtk_paint_flat_box
 242     (
 243         win->m_wxwindow->style,
 244         GTK_PIZZA(win->m_wxwindow)->bin_window,
 245         GTK_STATE_NORMAL,
 246         GTK_SHADOW_NONE,
 247         NULL,
 248         win->m_wxwindow,
 249         (char *)"viewportbin", // const_cast
 250         erase_rect.x,
 251         erase_rect.y,
 252         erase_rect.width,
 253         erase_rect.height
 254     );
 255 #endif
 256
 257
 258     // leave some margin before sash itself
 259     position += SASH_MARGIN / 2;
 260
 261     // and finally draw it using GTK paint functions
 262     typedef void (*GtkPaintLineFunc)(GtkStyle *, GdkWindow *,
 263                                                 GtkStateType,
 264                                                 GdkRectangle *, GtkWidget *,
 265                                                 gchar *,
 266                                                 gint, gint, gint);
 267
 268     GtkPaintLineFunc func = isVert ? gtk_paint_vline : gtk_paint_hline;
 269
 270     (*func)
 271     (
 272         win->m_wxwindow->style,
 273         GTK_PIZZA(win->m_wxwindow)->bin_window,
 274         GTK_STATE_NORMAL,
 275         NULL,
 276         win->m_wxwindow,
 277         (char *)"paned", // const_cast
 278         0, isVert ? size.y : size.x, position + SASH_SIZE / 2 - 1
 279     );
 280
 281     gtk_paint_box
 282     (
 283         win->m_wxwindow->style,
 284         GTK_PIZZA(win->m_wxwindow)->bin_window,
 285         GTK_STATE_NORMAL,
 286         GTK_SHADOW_OUT,
 287         (GdkRectangle*) NULL,
 288         win->m_wxwindow,
 289         (char *)"paned", // const_cast
 290         isVert ? position : size.x - 2*SASH_SIZE,
 291         isVert ? size.y - 2*SASH_SIZE : position,
 292         SASH_SIZE, SASH_SIZE
 293     );
 294 }
 295
 296 void
 297 wxRendererGTK::DrawDropArrow(wxWindow *win,
 298                              wxDC& dc,
 299                              const wxRect& rect,
 300                              int flags)
 301 {
 302     GtkWidget *button = GetButtonWidget();
 303
 304     // If we give GTK_PIZZA(win->m_wxwindow)->bin_window as
 305     // a window for gtk_paint_xxx function, then it won't
 306     // work for wxMemoryDC. So that is why we assume wxDC
 307     // is wxWindowDC (wxClientDC, wxMemoryDC and wxPaintDC
 308     // are derived from it) and use its m_window.
 309     wxWindowDC& wdc = (wxWindowDC&)dc;
 310
 311     // only doing debug-time checking here (it should
 312     // probably be enough)
 313     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 314
 315     // draw arrow so that there is even space horizontally
 316     // on both sides
 317     int arrowX = rect.width/4 + 1;
 318     int arrowWidth = rect.width - (arrowX*2);
 319
 320     // scale arrow's height accoording to the width
 321     int arrowHeight = rect.width/3;
 322     int arrowY = (rect.height-arrowHeight)/2 +
 323                  ((rect.height-arrowHeight) & 1);
 324
 325     GtkStateType state;
 326
 327     if ( flags & wxCONTROL_PRESSED )
 328         state = GTK_STATE_ACTIVE;
 329     else if ( flags & wxCONTROL_DISABLED )
 330         state = GTK_STATE_INSENSITIVE;
 331     else if ( flags & wxCONTROL_CURRENT )
 332         state = GTK_STATE_PRELIGHT;
 333     else
 334         state = GTK_STATE_NORMAL;
 335
 336     // draw arrow on button
 337     gtk_paint_arrow
 338     (
 339         button->style,
 340         wdc.m_window,
 341         state,
 342         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 343         NULL,
 344         button,
 345         "arrow",
 346         GTK_ARROW_DOWN,
 347         FALSE,
 348         rect.x + arrowX,
 349         rect.y + arrowY,
 350         arrowWidth,
 351         arrowHeight
 352     );
 353 }
 354
 355 void
 356 wxRendererGTK::DrawComboBoxDropButton(wxWindow *win,
 357                                       wxDC& dc,
 358                                       const wxRect& rect,
 359                                       int flags)
 360 {
 361     GtkWidget *button = GetButtonWidget();
 362
 363     // for reason why we do this, see DrawDropArrow
 364     wxWindowDC& wdc = (wxWindowDC&)dc;
 365     wxASSERT ( wdc.IsKindOf(CLASSINFO(wxWindowDC)) );
 366
 367     // draw button
 368     GtkStateType state;
 369
 370     if ( flags & wxCONTROL_PRESSED )
 371         state = GTK_STATE_ACTIVE;
 372     else if ( flags & wxCONTROL_DISABLED )
 373         state = GTK_STATE_INSENSITIVE;
 374     else if ( flags & wxCONTROL_CURRENT )
 375         state = GTK_STATE_PRELIGHT;
 376     else
 377         state = GTK_STATE_NORMAL;
 378
 379     gtk_paint_box
 380     (
 381         button->style,
 382         wdc.m_window,
 383         state,
 384         flags & wxCONTROL_PRESSED ? GTK_SHADOW_IN : GTK_SHADOW_OUT,
 385         NULL,
 386         button,
 387         "button",
 388         rect.x, rect.y, rect.width, rect.height
 389     );
 390
 391     // draw arrow on button
 392     DrawDropArrow(win,dc,rect,flags);
 393
 394 }