include/wx/gtk/window.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/window.h
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_GTK_WINDOW_H_
  11 #define _WX_GTK_WINDOW_H_
  12
  13 #include "wx/dynarray.h"
  14
  15 // helper structure that holds class that holds GtkIMContext object and
  16 // some additional data needed for key events processing
  17 struct wxGtkIMData;
  18
  19 WX_DEFINE_EXPORTED_ARRAY_PTR(GdkWindow *, wxArrayGdkWindows);
  20
  21 //-----------------------------------------------------------------------------
  22 // wxWindowGTK
  23 //-----------------------------------------------------------------------------
  24
  25 class WXDLLIMPEXP_CORE wxWindowGTK : public wxWindowBase
  26 {
  27 public:
  28     // creating the window
  29     // -------------------
  30     wxWindowGTK();
  31     wxWindowGTK(wxWindow *parent,
  32                 wxWindowID id,
  33                 const wxPoint& pos = wxDefaultPosition,
  34                 const wxSize& size = wxDefaultSize,
  35                 long style = 0,
  36                 const wxString& name = wxPanelNameStr);
  37     bool Create(wxWindow *parent,
  38                 wxWindowID id,
  39                 const wxPoint& pos = wxDefaultPosition,
  40                 const wxSize& size = wxDefaultSize,
  41                 long style = 0,
  42                 const wxString& name = wxPanelNameStr);
  43     virtual ~wxWindowGTK();
  44
  45     // implement base class (pure) virtual methods
  46     // -------------------------------------------
  47
  48     virtual bool Destroy();
  49
  50     virtual void Raise();
  51     virtual void Lower();
  52
  53     virtual bool Show( bool show = true );
  54
  55     virtual void SetWindowStyleFlag( long style );
  56
  57     virtual bool IsRetained() const;
  58
  59     virtual void SetFocus();
  60
  61     // hint from wx to native GTK+ tab traversal code
  62     virtual void SetCanFocus(bool canFocus);
  63
  64     virtual bool Reparent( wxWindowBase *newParent );
  65
  66     virtual void WarpPointer(int x, int y);
  67
  68     virtual void Refresh( bool eraseBackground = true,
  69                           const wxRect *rect = (const wxRect *) NULL );
  70     virtual void Update();
  71     virtual void ClearBackground();
  72
  73     virtual bool SetBackgroundColour( const wxColour &colour );
  74     virtual bool SetForegroundColour( const wxColour &colour );
  75     virtual bool SetCursor( const wxCursor &cursor );
  76     virtual bool SetFont( const wxFont &font );
  77
  78     virtual bool SetBackgroundStyle(wxBackgroundStyle style) ;
  79
  80     virtual int GetCharHeight() const;
  81     virtual int GetCharWidth() const;
  82
  83     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
  84                                int range, bool refresh = true );
  85     virtual void SetScrollPos( int orient, int pos, bool refresh = true );
  86     virtual int GetScrollPos( int orient ) const;
  87     virtual int GetScrollThumb( int orient ) const;
  88     virtual int GetScrollRange( int orient ) const;
  89     virtual void ScrollWindow( int dx, int dy,
  90                                const wxRect* rect = NULL );
  91     virtual bool ScrollLines(int lines);
  92     virtual bool ScrollPages(int pages);
  93
  94 #if wxUSE_DRAG_AND_DROP
  95     virtual void SetDropTarget( wxDropTarget *dropTarget );
  96 #endif // wxUSE_DRAG_AND_DROP
  97
  98     virtual void AddChild( wxWindowBase *child );
  99     virtual void RemoveChild( wxWindowBase *child );
 100
 101     virtual void SetLayoutDirection(wxLayoutDirection dir);
 102     virtual wxLayoutDirection GetLayoutDirection() const;
 103     virtual wxCoord AdjustForLayoutDirection(wxCoord x,
 104                                              wxCoord width,
 105                                              wxCoord widthTotal) const;
 106
 107     virtual bool DoIsExposed( int x, int y ) const;
 108     virtual bool DoIsExposed( int x, int y, int w, int h ) const;
 109
 110     // currently wxGTK2-only
 111     void SetDoubleBuffered(bool on);
 112     virtual bool IsDoubleBuffered() const;
 113
 114     // SetLabel(), which does nothing in wxWindow
 115     virtual void SetLabel(const wxString& label) { m_gtkLabel = label; }
 116     virtual wxString GetLabel() const            { return m_gtkLabel; }
 117
 118     // implementation
 119     // --------------
 120
 121     virtual WXWidget GetHandle() const { return m_widget; }
 122
 123     // many important things are done here, this function must be called
 124     // regularly
 125     virtual void OnInternalIdle();
 126
 127     // For compatibility across platforms (not in event table)
 128     void OnIdle(wxIdleEvent& WXUNUSED(event)) {}
 129
 130     // Used by all window classes in the widget creation process.
 131     bool PreCreation( wxWindowGTK *parent, const wxPoint &pos, const wxSize &size );
 132     void PostCreation();
 133
 134     // Internal addition of child windows
 135     void DoAddChild(wxWindowGTK *child);
 136
 137     // This methods sends wxPaintEvents to the window. It reads the
 138     // update region, breaks it up into rects and sends an event
 139     // for each rect. It is also responsible for background erase
 140     // events and NC paint events. It is called from "draw" and
 141     // "expose" handlers as well as from ::Update()
 142     void GtkSendPaintEvents();
 143
 144     // The methods below are required because many native widgets
 145     // are composed of several subwidgets and setting a style for
 146     // the widget means setting it for all subwidgets as well.
 147     // also, it is not clear which native widget is the top
 148     // widget where (most of) the input goes. even tooltips have
 149     // to be applied to all subwidgets.
 150     virtual GtkWidget* GetConnectWidget();
 151     void ConnectWidget( GtkWidget *widget );
 152
 153     // Called from several event handlers, if it returns true or false, the
 154     // same value should be immediately returned by the handler without doing
 155     // anything else. If it returns -1, the handler should continue as usual
 156     int GTKCallbackCommonPrologue(struct _GdkEventAny *event) const;
 157
 158     // Simplified form of GTKCallbackCommonPrologue() which can be used from
 159     // GTK callbacks without return value to check if the event should be
 160     // ignored: if this returns true, the event shouldn't be handled
 161     bool GTKShouldIgnoreEvent() const;
 162
 163
 164     // override this if some events should never be consumed by wxWidgets but
 165     // but have to be left for the native control
 166     //
 167     // base version just calls HandleWindowEvent()
 168     virtual bool GTKProcessEvent(wxEvent& event) const;
 169
 170     // Map GTK widget direction of the given widget to/from wxLayoutDirection
 171     static wxLayoutDirection GTKGetLayout(GtkWidget *widget);
 172     static void GTKSetLayout(GtkWidget *widget, wxLayoutDirection dir);
 173
 174     // return true if this window must have a non-NULL parent, false if it can
 175     // be created without parent (normally only top level windows but in wxGTK
 176     // there is also the exception of wxMenuBar)
 177     virtual bool GTKNeedsParent() const { return !IsTopLevel(); }
 178
 179     // This is called when capture is taken from the window. It will
 180     // fire off capture lost events.
 181     void GTKReleaseMouseAndNotify();
 182
 183     GdkWindow* GTKGetDrawingWindow() const;
 184
 185     bool GTKHandleFocusIn();
 186     bool GTKHandleFocusOut();
 187     void GTKHandleFocusOutNoDeferring();
 188     static void GTKHandleDeferredFocusOut();
 189
 190 protected:
 191     // for controls composed of multiple GTK widgets, return true to eliminate
 192     // spurious focus events if the focus changes between GTK+ children within
 193     // the same wxWindow
 194     virtual bool GTKNeedsToFilterSameWindowFocus() const { return false; }
 195
 196     // Override GTKWidgetNeedsMnemonic and return true if your
 197     // needs to set its mnemonic widget, such as for a
 198     // GtkLabel for wxStaticText, then do the actual
 199     // setting of the widget inside GTKWidgetDoSetMnemonic
 200     virtual bool GTKWidgetNeedsMnemonic() const;
 201     virtual void GTKWidgetDoSetMnemonic(GtkWidget* w);
 202
 203     // Get the GdkWindows making part of this window: usually there will be
 204     // only one of them in which case it should be returned directly by this
 205     // function. If there is more than one GdkWindow (can be the case for
 206     // composite widgets), return NULL and fill in the provided array
 207     //
 208     // This is not pure virtual for backwards compatibility but almost
 209     // certainly must be overridden in any wxControl-derived class!
 210     virtual GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const;
 211
 212     // Check if the given window makes part of this widget
 213     bool GTKIsOwnWindow(GdkWindow *window) const;
 214
 215 public:
 216     // Returns the default context which usually is anti-aliased
 217     PangoContext   *GTKGetPangoDefaultContext();
 218
 219 #if wxUSE_TOOLTIPS
 220     // applies tooltip to the widget (tip must be UTF-8 encoded)
 221     virtual void GTKApplyToolTip( GtkTooltips *tips, const gchar *tip );
 222 #endif // wxUSE_TOOLTIPS
 223
 224     // Called when a window should delay showing itself
 225     // until idle time used in Reparent().
 226     void GTKShowOnIdle() { m_showOnIdle = true; }
 227
 228     // This is called from the various OnInternalIdle methods
 229     bool GTKShowFromOnIdle();
 230
 231     // is this window transparent for the mouse events (as wxStaticBox is)?
 232     virtual bool GTKIsTransparentForMouse() const { return false; }
 233
 234     // Common scroll event handling code for wxWindow and wxScrollBar
 235     wxEventType GTKGetScrollEventType(GtkRange* range);
 236
 237     // position and size of the window
 238     int                  m_x, m_y;
 239     int                  m_width, m_height;
 240     int                  m_oldClientWidth,m_oldClientHeight;
 241
 242     // see the docs in src/gtk/window.cpp
 243     GtkWidget           *m_widget;          // mostly the widget seen by the rest of GTK
 244     GtkWidget           *m_wxwindow;        // mostly the client area as per wxWidgets
 245
 246     // label for use with GetLabelSetLabel
 247     wxString             m_gtkLabel;
 248
 249     // return true if the window is of a standard (i.e. not wxWidgets') class
 250     bool IsOfStandardClass() const { return m_wxwindow == NULL; }
 251
 252     // this widget will be queried for GTK's focus events
 253     GtkWidget           *m_focusWidget;
 254
 255     void GTKDisableFocusOutEvent();
 256     void GTKEnableFocusOutEvent();
 257
 258     wxGtkIMData         *m_imData;
 259
 260
 261     // indices for the arrays below
 262     enum ScrollDir { ScrollDir_Horz, ScrollDir_Vert, ScrollDir_Max };
 263
 264     // horizontal/vertical scroll bar
 265     GtkRange* m_scrollBar[ScrollDir_Max];
 266
 267     // horizontal/vertical scroll position
 268     double m_scrollPos[ScrollDir_Max];
 269
 270     // return the scroll direction index corresponding to the given orientation
 271     // (which is wxVERTICAL or wxHORIZONTAL)
 272     static ScrollDir ScrollDirFromOrient(int orient)
 273     {
 274         return orient == wxVERTICAL ? ScrollDir_Vert : ScrollDir_Horz;
 275     }
 276
 277     // return the orientation for the given scrolling direction
 278     static int OrientFromScrollDir(ScrollDir dir)
 279     {
 280         return dir == ScrollDir_Horz ? wxHORIZONTAL : wxVERTICAL;
 281     }
 282
 283     // find the direction of the given scrollbar (must be one of ours)
 284     ScrollDir ScrollDirFromRange(GtkRange *range) const;
 285
 286     // set the current cursor for all GdkWindows making part of this widget
 287     // (see GTKGetWindow)
 288     void GTKUpdateCursor(bool update_self = true, bool recurse = true);
 289
 290     // extra (wxGTK-specific) flags
 291     bool                 m_noExpose:1;          // wxGLCanvas has its own redrawing
 292     bool                 m_nativeSizeEvent:1;   // wxGLCanvas sends wxSizeEvent upon "alloc_size"
 293     bool                 m_hasVMT:1;            // set after PostCreation() is called
 294     bool                 m_isScrolling:1;       // dragging scrollbar thumb?
 295     bool                 m_clipPaintRegion:1;   // true after ScrollWindow()
 296     wxRegion             m_nativeUpdateRegion;  // not transformed for RTL
 297     bool                 m_dirtyTabOrder:1;     // tab order changed, GTK focus
 298                                                 // chain needs update
 299     bool                 m_needsStyleChange:1;  // May not be able to change
 300                                                 // background style until OnIdle
 301     bool                 m_mouseButtonDown:1;
 302
 303     bool                 m_showOnIdle:1;        // postpone showing the window until idle
 304
 305 protected:
 306     // implement the base class pure virtuals
 307     virtual void DoGetTextExtent(const wxString& string,
 308                                  int *x, int *y,
 309                                  int *descent = NULL,
 310                                  int *externalLeading = NULL,
 311                                  const wxFont *font = NULL) const;
 312     virtual void DoClientToScreen( int *x, int *y ) const;
 313     virtual void DoScreenToClient( int *x, int *y ) const;
 314     virtual void DoGetPosition( int *x, int *y ) const;
 315     virtual void DoGetSize( int *width, int *height ) const;
 316     virtual void DoGetClientSize( int *width, int *height ) const;
 317     virtual void DoSetSize(int x, int y,
 318                            int width, int height,
 319                            int sizeFlags = wxSIZE_AUTO);
 320     virtual void DoSetClientSize(int width, int height);
 321     virtual wxSize DoGetBorderSize() const;
 322     virtual void DoMoveWindow(int x, int y, int width, int height);
 323     virtual void DoEnable(bool enable);
 324
 325 #if wxUSE_MENUS_NATIVE
 326     virtual bool DoPopupMenu( wxMenu *menu, int x, int y );
 327 #endif // wxUSE_MENUS_NATIVE
 328
 329     virtual void DoCaptureMouse();
 330     virtual void DoReleaseMouse();
 331
 332     virtual void DoFreeze();
 333     virtual void DoThaw();
 334
 335     void GTKFreezeWidget(GtkWidget *w);
 336     void GTKThawWidget(GtkWidget *w);
 337
 338 #if wxUSE_TOOLTIPS
 339     virtual void DoSetToolTip( wxToolTip *tip );
 340 #endif // wxUSE_TOOLTIPS
 341
 342     // common part of all ctors (not virtual because called from ctor)
 343     void Init();
 344
 345     virtual void DoMoveInTabOrder(wxWindow *win, WindowOrder move);
 346     virtual bool DoNavigateIn(int flags);
 347
 348
 349     // Copies m_children tab order to GTK focus chain:
 350     void RealizeTabOrder();
 351
 352     // Called by ApplyWidgetStyle (which is called by SetFont() and
 353     // SetXXXColour etc to apply style changed to native widgets) to create
 354     // modified GTK style with non-standard attributes. If forceStyle=true,
 355     // creates empty GtkRcStyle if there are no modifications, otherwise
 356     // returns NULL in such case.
 357     GtkRcStyle *GTKCreateWidgetStyle(bool forceStyle = false);
 358
 359     // Overridden in many GTK widgets who have to handle subwidgets
 360     virtual void GTKApplyWidgetStyle(bool forceStyle = false);
 361
 362     // helper function to ease native widgets wrapping, called by
 363     // ApplyWidgetStyle -- override this, not ApplyWidgetStyle
 364     virtual void DoApplyWidgetStyle(GtkRcStyle *style);
 365
 366     // sets the border of a given GtkScrolledWindow from a wx style
 367     static void GTKScrolledWindowSetBorder(GtkWidget* w, int style);
 368
 369     // Connect the given function to the specified signal on m_widget.
 370     //
 371     // This is just a wrapper for g_signal_connect() and returns the handler id
 372     // just as it does.
 373     gulong GTKConnectWidget(const char *signal, void (*callback)());
 374
 375     // Return true from here if PostCreation() should connect to size_request
 376     // signal: this is done by default but doesn't work for some native
 377     // controls which override this function to return false
 378     virtual bool GTKShouldConnectSizeRequest() const { return !IsTopLevel(); }
 379
 380     void ConstrainSize();
 381
 382 private:
 383     enum ScrollUnit { ScrollUnit_Line, ScrollUnit_Page, ScrollUnit_Max };
 384
 385     // common part of ScrollLines() and ScrollPages() and could be used, in the
 386     // future, for horizontal scrolling as well
 387     //
 388     // return true if we scrolled, false otherwise (on error or simply if we
 389     // are already at the end)
 390     bool DoScrollByUnits(ScrollDir dir, ScrollUnit unit, int units);
 391     virtual void AddChildGTK(wxWindowGTK* child);
 392
 393
 394     DECLARE_DYNAMIC_CLASS(wxWindowGTK)
 395     wxDECLARE_NO_COPY_CLASS(wxWindowGTK);
 396 };
 397
 398 #endif // _WX_GTK_WINDOW_H_