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