Made sure events for defunct windows are no longer handled.

[wxWidgets.git] / src / x11 / window.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        windows.cpp
// Purpose:     wxWindow
// Author:      Julian Smart
// Modified by:
// Created:     17/09/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifdef __GNUG__
    #pragma implementation "window.h"
#endif

#include "wx/setup.h"
#include "wx/menu.h"
#include "wx/dc.h"
#include "wx/dcclient.h"
#include "wx/utils.h"
#include "wx/app.h"
#include "wx/panel.h"
#include "wx/layout.h"
#include "wx/dialog.h"
#include "wx/listbox.h"
#include "wx/button.h"
#include "wx/settings.h"
#include "wx/msgdlg.h"
#include "wx/frame.h"
#include "wx/scrolwin.h"
#include "wx/module.h"
#include "wx/menuitem.h"
#include "wx/log.h"

#if  wxUSE_DRAG_AND_DROP
    #include "wx/dnd.h"
#endif

#include "wx/x11/private.h"
#include "X11/Xutil.h"

#include <string.h>

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

static const int SCROLL_MARGIN = 4;

// ----------------------------------------------------------------------------
// global variables for this module
// ----------------------------------------------------------------------------

extern wxHashTable *wxWidgetHashTable;
static wxWindow* g_captureWindow = NULL;

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

#define event_left_is_down(x) ((x)->xbutton.state & Button1Mask)
#define event_middle_is_down(x) ((x)->xbutton.state & Button2Mask)
#define event_right_is_down(x) ((x)->xbutton.state & Button3Mask)

// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS(wxWindowX11, wxWindowBase)

BEGIN_EVENT_TABLE(wxWindowX11, wxWindowBase)
    EVT_SYS_COLOUR_CHANGED(wxWindowX11::OnSysColourChanged)
    EVT_IDLE(wxWindowX11::OnIdle)
END_EVENT_TABLE()

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// helper functions
// ----------------------------------------------------------------------------

// ----------------------------------------------------------------------------
// constructors
// ----------------------------------------------------------------------------

void wxWindowX11::Init()
{
    // generic initializations first
    InitBase();

    // X11-specific
    m_mainWidget = (WXWindow) 0;

    m_winCaptured = FALSE;

    m_isShown = TRUE;
    m_isBeingDeleted = FALSE;
    
    m_lastTS = 0;
    m_lastButton = 0;
}

// real construction (Init() must have been called before!)
bool wxWindowX11::Create(wxWindow *parent, wxWindowID id,
                      const wxPoint& pos,
                      const wxSize& size,
                      long style,
                      const wxString& name)
{
    wxCHECK_MSG( parent, FALSE, "can't create wxWindow without parent" );

    CreateBase(parent, id, pos, size, style, wxDefaultValidator, name);

    if (parent)
        parent->AddChild(this);

    m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
    m_foregroundColour = *wxBLACK;

    int w = size.GetWidth();
    int h = size.GetHeight();
    int x = size.GetX();
    int y = size.GetY();
    if (w == -1) w = 20;
    if (h == -1) h = 20;
    if (x == -1) x = 0;
    if (y == -1) y = 0;

    int screen = DefaultScreen(wxGlobalDisplay());

    Window parentWindow;
    if (parent)
        parentWindow = (Window) parent->GetMainWindow();
    else
        parentWindow = RootWindow(wxGlobalDisplay(), screen);

    Window window = XCreateSimpleWindow(wxGlobalDisplay(), parentWindow,
        x, y, w, h, 0,
        m_backgroundColour.AllocColour(wxGlobalDisplay()),
					m_foregroundColour.AllocColour(wxGlobalDisplay()));
    m_mainWidget = (WXWindow) window;

    // Select event types wanted
    XSelectInput(wxGlobalDisplay(), window,
        ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
        ButtonMotionMask | EnterWindowMask | LeaveWindowMask | PointerMotionMask |
        KeymapStateMask | FocusChangeMask | ColormapChangeMask | StructureNotifyMask |
        PropertyChangeMask);

    wxAddWindowToTable(window, (wxWindow*) this);

    // Is a subwindow, so map immediately
    m_isShown = TRUE;
    XMapWindow(wxGlobalDisplay(), window);

    // Without this, the cursor may not be restored properly (e.g. in splitter
    // sample).
    SetCursor(*wxSTANDARD_CURSOR);
    SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
    SetSize(pos.x, pos.y, size.x, size.y);

    return TRUE;
}

// Destructor
wxWindowX11::~wxWindowX11()
{
    if (g_captureWindow == this)
	g_captureWindow = NULL;
    
    m_isBeingDeleted = TRUE;
    
    // X11-specific actions first
    Window main = (Window) m_mainWidget;
    if ( main )
    {
        // Removes event handlers
        //DetachWidget(main);
    }

    if (m_parent)
        m_parent->RemoveChild( this );

    DestroyChildren();

    // Destroy the window
    if (main)
    {
        XSelectInput( wxGlobalDisplay(), main, NoEventMask);
        wxDeleteWindowFromTable( main );
        XDestroyWindow( wxGlobalDisplay(), main );
        m_mainWidget = NULL;
    }
}

// ---------------------------------------------------------------------------
// basic operations
// ---------------------------------------------------------------------------

void wxWindowX11::SetFocus()
{
    Window wMain = (Window) GetMainWindow();
    if (wMain)
    {
        XSetInputFocus(wxGlobalDisplay(), wMain, RevertToParent, CurrentTime);
        
        XWMHints wmhints;
        wmhints.flags = InputHint;
        wmhints.input = True;
        XSetWMHints(wxGlobalDisplay(), wMain, &wmhints);
    }
}

// Get the window with the focus
wxWindow *wxWindowBase::FindFocus()
{
    Window wFocus = (Window) 0;
    int revert = 0;

    XGetInputFocus(wxGlobalDisplay(), & wFocus, & revert);
    if (wFocus)
    {
        wxWindow *win = NULL;
        do
        {
            win = wxGetWindowFromTable(wFocus);
            wFocus = wxGetWindowParent(wFocus);
        } while (wFocus && !win);

        return win;
    }

    return NULL;
}

// Enabling/disabling handled by event loop, and not sending events
// if disabled.
bool wxWindowX11::Enable(bool enable)
{
    if ( !wxWindowBase::Enable(enable) )
        return FALSE;
   
    return TRUE;
}

bool wxWindowX11::Show(bool show)
{
    if ( !wxWindowBase::Show(show) )
        return FALSE;

    Window xwin = (Window) GetXWindow();
    Display *xdisp = (Display*) GetXDisplay();
    if (show)
    {
        XMapWindow(xdisp, xwin);
    }
    else
    {
        XUnmapWindow(xdisp, xwin);
    }

    return TRUE;
}

// Raise the window to the top of the Z order
void wxWindowX11::Raise()
{
    if (m_mainWidget)
        XRaiseWindow( wxGlobalDisplay(), (Window) m_mainWidget );
}

// Lower the window to the bottom of the Z order
void wxWindowX11::Lower()
{
    if (m_mainWidget)
        XLowerWindow( wxGlobalDisplay(), (Window) m_mainWidget );
}

void wxWindowX11::DoCaptureMouse()
{
    g_captureWindow = (wxWindow*) this;
    if ( m_winCaptured )
        return;

    if (GetMainWindow())
    {
        int res = XGrabPointer(wxGlobalDisplay(), (Window) GetMainWindow(),
            FALSE,
            ButtonPressMask | ButtonReleaseMask | ButtonMotionMask | EnterWindowMask | LeaveWindowMask | PointerMotionMask,
            GrabModeAsync,
	        GrabModeAsync,
            None,
            None, /* cursor */ // TODO: This may need to be set to the cursor of this window
            CurrentTime);

        if (res != GrabSuccess)
        {
            wxLogDebug("Failed to grab pointer.");
            return;
        }

        res = XGrabButton(wxGlobalDisplay(), AnyButton, AnyModifier,
            (Window) GetMainWindow(),
            FALSE,
            ButtonPressMask | ButtonReleaseMask | ButtonMotionMask,
	        GrabModeAsync,
	        GrabModeAsync,
            None,
            None);

        if (res != GrabSuccess)
        {
            wxLogDebug("Failed to grab mouse buttons.");
            XUngrabPointer(wxGlobalDisplay(), CurrentTime);
            return;
        }

        res = XGrabKeyboard(wxGlobalDisplay(), (Window) GetMainWindow(),
#if 0
            ShiftMask | LockMask | ControlMask | Mod1Mask | Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask,
#else
            FALSE,
#endif
            GrabModeAsync,
	        GrabModeAsync,
            CurrentTime);

        if (res != GrabSuccess)
        {
            wxLogDebug("Failed to grab keyboard.");
            XUngrabPointer(wxGlobalDisplay(), CurrentTime);
            XUngrabButton(wxGlobalDisplay(), AnyButton, AnyModifier,
                (Window) GetMainWindow());
            return;
        }

        m_winCaptured = TRUE;
    }
}

void wxWindowX11::DoReleaseMouse()
{
    g_captureWindow = NULL;
    if ( !m_winCaptured )
        return;

    Window wMain = (Window)GetMainWindow();

    if ( wMain )
    {
        XUngrabPointer(wxGlobalDisplay(), wMain);
        XUngrabButton(wxGlobalDisplay(), AnyButton, AnyModifier,
                wMain);
        XUngrabKeyboard(wxGlobalDisplay(), CurrentTime);
    }

    m_winCaptured = FALSE;
}

bool wxWindowX11::SetFont(const wxFont& font)
{
    if ( !wxWindowBase::SetFont(font) )
    {
        // nothing to do
        return FALSE;
    }

    return TRUE;
}

bool wxWindowX11::SetCursor(const wxCursor& cursor)
{
    if ( !wxWindowBase::SetCursor(cursor) )
    {
        // no change
        return FALSE;
    }

    wxCursor* cursor2 = NULL;
    if (m_cursor.Ok())
        cursor2 = & m_cursor;
    else
        cursor2 = wxSTANDARD_CURSOR;

    WXDisplay *dpy = GetXDisplay();
    WXCursor x_cursor = cursor2->GetXCursor(dpy);

    Window win = (Window) GetMainWindow();
    XDefineCursor((Display*) dpy, win, (Cursor) x_cursor);

    return TRUE;
}

// Coordinates relative to the window
void wxWindowX11::WarpPointer (int x, int y)
{
    if (m_mainWidget)
        XWarpPointer( wxGlobalDisplay(), None, (Window) m_mainWidget, 0, 0, 0, 0, x, y);
}

// Does a physical scroll
void wxWindowX11::ScrollWindow(int dx, int dy, const wxRect *rect)
{
    int x, y, w, h;
    if (rect)
    {
        // Use specified rectangle
        x = rect->x; y = rect->y; w = rect->width; h = rect->height;
    }
    else
    {
        // Use whole client area
        x = 0; y = 0;
        GetClientSize(& w, & h);
    }
    
    wxNode *cnode = m_children.First();
    while (cnode)
    {
        wxWindow *child = (wxWindow*) cnode->Data();
        int sx = 0;
        int sy = 0;
        child->GetSize( &sx, &sy );
        wxPoint pos( child->GetPosition() );
        child->SetSize( pos.x + dx, pos.y + dy, sx, sy, wxSIZE_ALLOW_MINUS_ONE );
        cnode = cnode->Next();
    }
    
    int x1 = (dx >= 0) ? x : x - dx;
    int y1 = (dy >= 0) ? y : y - dy;
    int w1 = w - abs(dx);
    int h1 = h - abs(dy);
    int x2 = (dx >= 0) ? x + dx : x;
    int y2 = (dy >= 0) ? y + dy : y;
    
    wxClientDC dc((wxWindow*) this);
    
    dc.SetLogicalFunction (wxCOPY);
    
    Window window = (Window) GetMainWindow();
    Display* display = wxGlobalDisplay();
    
    XCopyArea(display, window, window, (GC) dc.GetGC(),
        x1, y1, w1, h1, x2, y2);
    
    dc.SetAutoSetting(TRUE);
    wxBrush brush(GetBackgroundColour(), wxSOLID);
    dc.SetBrush(brush); // FIXME: needed?
    
    // We'll add rectangles to the list of update rectangles according to which
    // bits we've exposed.
    wxList updateRects;
    
    if (dx > 0)
    {
        wxRect *rect = new wxRect;
        rect->x = x;
        rect->y = y;
        rect->width = dx;
        rect->height = h;
        
        XFillRectangle(display, window,
            (GC) dc.GetGC(), rect->x, rect->y, rect->width, rect->height);
        
        rect->x = rect->x;
        rect->y = rect->y;
        rect->width = rect->width;
        rect->height = rect->height;
        
        updateRects.Append((wxObject*) rect);
    }
    else if (dx < 0)
    {
        wxRect *rect = new wxRect;
        
        rect->x = x + w + dx;
        rect->y = y;
        rect->width = -dx;
        rect->height = h;
        
        XFillRectangle(display, window,
            (GC) dc.GetGC(), rect->x, rect->y, rect->width,
            rect->height);
        
        rect->x = rect->x;
        rect->y = rect->y;
        rect->width = rect->width;
        rect->height = rect->height;
        
        updateRects.Append((wxObject*) rect);
    }
    if (dy > 0)
    {
        wxRect *rect = new wxRect;
        
        rect->x = x;
        rect->y = y;
        rect->width = w;
        rect->height = dy;
        
        XFillRectangle(display, window,
            (GC) dc.GetGC(), rect->x, rect->y, rect->width, rect->height);
        
        rect->x = rect->x;
        rect->y = rect->y;
        rect->width = rect->width;
        rect->height = rect->height;
        
        updateRects.Append((wxObject*) rect);
    }
    else if (dy < 0)
    {
        wxRect *rect = new wxRect;
        
        rect->x = x;
        rect->y = y + h + dy;
        rect->width = w;
        rect->height = -dy;
        
        XFillRectangle(display, window,
            (GC) dc.GetGC(), rect->x, rect->y, rect->width, rect->height);
        
        rect->x = rect->x;
        rect->y = rect->y;
        rect->width = rect->width;
        rect->height = rect->height;
        
        updateRects.Append((wxObject*) rect);
    }
    dc.SetBrush(wxNullBrush);
    
    // Now send expose events
    
    wxNode* node = updateRects.First();
    while (node)
    {
        wxRect* rect = (wxRect*) node->Data();
        XExposeEvent event;
        
        event.type = Expose;
        event.display = display;
        event.send_event = True;
        event.window = window;
        
        event.x = rect->x;
        event.y = rect->y;
        event.width = rect->width;
        event.height = rect->height;
        
        event.count = 0;
        
        XSendEvent(display, window, False, ExposureMask, (XEvent *)&event);
        
        node = node->Next();
        
    }
    
    // Delete the update rects
    node = updateRects.First();
    while (node)
    {
        wxRect* rect = (wxRect*) node->Data();
        delete rect;
        node = node->Next();
    }
    
    // TODO

    // XmUpdateDisplay((Widget) GetMainWidget());
}

// ---------------------------------------------------------------------------
// drag and drop
// ---------------------------------------------------------------------------

#if wxUSE_DRAG_AND_DROP

void wxWindowX11::SetDropTarget(wxDropTarget * WXUNUSED(pDropTarget))
{
    // TODO
}

#endif

// Old style file-manager drag&drop
void wxWindowX11::DragAcceptFiles(bool WXUNUSED(accept))
{
    // TODO
}

// ----------------------------------------------------------------------------
// tooltips
// ----------------------------------------------------------------------------

#if wxUSE_TOOLTIPS

void wxWindowX11::DoSetToolTip(wxToolTip * WXUNUSED(tooltip))
{
    // TODO
}

#endif // wxUSE_TOOLTIPS

// ---------------------------------------------------------------------------
// moving and resizing
// ---------------------------------------------------------------------------

bool wxWindowX11::PreResize()
{
    return TRUE;
}

// Get total size
void wxWindowX11::DoGetSize(int *x, int *y) const
{
    Window window = (Window) m_mainWidget;
    if (window)
    {
        XWindowAttributes attr;
        Status status = XGetWindowAttributes(wxGlobalDisplay(), window, & attr);
        wxASSERT(status);
        
        if (status)
        {
            *x = attr.width /* + 2*m_borderSize */ ;
            *y = attr.height /* + 2*m_borderSize */ ;
        }
    }
}

void wxWindowX11::DoGetPosition(int *x, int *y) const
{
    Window window = (Window) m_mainWidget;
    if (window)
    {
        XWindowAttributes attr;
        Status status = XGetWindowAttributes(wxGlobalDisplay(), window, & attr);
        wxASSERT(status);
        
        if (status)
        {
            *x = attr.x;
            *y = attr.y;
            
            // We may be faking the client origin. So a window that's really at (0, 30)
            // may appear (to wxWin apps) to be at (0, 0).
            if (GetParent())
            {
                wxPoint pt(GetParent()->GetClientAreaOrigin());
                *x -= pt.x;
                *y -= pt.y;
            }
        }
    }
}

void wxWindowX11::DoScreenToClient(int *x, int *y) const
{
    Display *display = wxGlobalDisplay();
    Window rootWindow = RootWindowOfScreen(DefaultScreenOfDisplay(display));
    Window thisWindow = (Window) m_mainWidget;

    Window childWindow;
    int xx = *x;
    int yy = *y;
    XTranslateCoordinates(display, rootWindow, thisWindow, xx, yy, x, y, &childWindow);
}

void wxWindowX11::DoClientToScreen(int *x, int *y) const
{
    Display *display = wxGlobalDisplay();
    Window rootWindow = RootWindowOfScreen(DefaultScreenOfDisplay(display));
    Window thisWindow = (Window) m_mainWidget;

    Window childWindow;
    int xx = *x;
    int yy = *y;
    XTranslateCoordinates(display, thisWindow, rootWindow, xx, yy, x, y, &childWindow);
}


// Get size *available for subwindows* i.e. excluding menu bar etc.
void wxWindowX11::DoGetClientSize(int *x, int *y) const
{
    Window window = (Window) m_mainWidget;

    if (window)
    {
        XWindowAttributes attr;
        Status status = XGetWindowAttributes(wxGlobalDisplay(), window, & attr);
        wxASSERT(status);
        
        if (status)
        {
            *x = attr.width ;
            *y = attr.height ;
        }
    }
}

void wxWindowX11::DoSetSize(int x, int y, int width, int height, int sizeFlags)
{
    if (!GetMainWindow())
        return;

    XWindowChanges windowChanges;
    int valueMask = 0;

    if (x != -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
    {
        windowChanges.x = x;
        valueMask |= CWX;
    }
    if (y != -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
    {
        windowChanges.y = y;
        valueMask |= CWY;
    }
    if (width != -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
    {
        windowChanges.width = width /* - m_borderSize*2 */;
        valueMask |= CWWidth;
    }
    if (height != -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
    {
        windowChanges.height = height /* -m_borderSize*2*/;
        valueMask |= CWHeight;
    }
    AdjustForParentClientOrigin( x, y, sizeFlags);

    XConfigureWindow(wxGlobalDisplay(), (Window) GetMainWindow(),
        valueMask, & windowChanges);
}

void wxWindowX11::DoSetClientSize(int width, int height)
{
    if (!GetMainWindow())
        return;

    XWindowChanges windowChanges;
    int valueMask = 0;

    if (width != -1)
    {
        windowChanges.width = width ;
        valueMask |= CWWidth;
    }
    if (height != -1)
    {
        windowChanges.height = height ;
        valueMask |= CWHeight;
    }
    XConfigureWindow(wxGlobalDisplay(), (Window) GetMainWindow(),
        valueMask, & windowChanges);
}

// For implementation purposes - sometimes decorations make the client area
// smaller
wxPoint wxWindowX11::GetClientAreaOrigin() const
{
    return wxPoint(0, 0);
}

// Makes an adjustment to the window position (for example, a frame that has
// a toolbar that it manages itself).
void wxWindowX11::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags)
{
    if (((sizeFlags & wxSIZE_NO_ADJUSTMENTS) == 0) && GetParent())
    {
        wxPoint pt(GetParent()->GetClientAreaOrigin());
        x += pt.x; y += pt.y;
    }
}

void wxWindowX11::SetSizeHints(int minW, int minH, int maxW, int maxH, int incW, int incH)
{
    m_minWidth = minW;
    m_minHeight = minH;
    m_maxWidth = maxW;
    m_maxHeight = maxH;

    XSizeHints sizeHints;
    sizeHints.flags = 0;
    
    if (minW > -1 && minH > -1)
    {
        sizeHints.flags |= PMinSize;
        sizeHints.min_width = minW;
        sizeHints.min_height = minH;
    }
    if (maxW > -1 && maxH > -1)
    {
        sizeHints.flags |= PMaxSize;
        sizeHints.max_width = maxW;
        sizeHints.max_height = maxH;
    }
    if (incW > -1 && incH > -1)
    {
        sizeHints.flags |= PResizeInc;
        sizeHints.width_inc = incW;
        sizeHints.height_inc = incH;
    }

    XSetWMNormalHints(wxGlobalDisplay(), (Window) GetMainWindow(), & sizeHints);
}

void wxWindowX11::DoMoveWindow(int x, int y, int width, int height)
{
    DoSetSize(x, y, width, height);
}

// ---------------------------------------------------------------------------
// text metrics
// ---------------------------------------------------------------------------

int wxWindowX11::GetCharHeight() const
{
    wxCHECK_MSG( m_font.Ok(), 0, "valid window font needed" );

    WXFontStructPtr pFontStruct = m_font.GetFontStruct(1.0, GetXDisplay());

    int direction, ascent, descent;
    XCharStruct overall;
    XTextExtents ((XFontStruct*) pFontStruct, "x", 1, &direction, &ascent,
        &descent, &overall);

    //  return (overall.ascent + overall.descent);
    return (ascent + descent);
}

int wxWindowX11::GetCharWidth() const
{
    wxCHECK_MSG( m_font.Ok(), 0, "valid window font needed" );

    WXFontStructPtr pFontStruct = m_font.GetFontStruct(1.0, GetXDisplay());

    int direction, ascent, descent;
    XCharStruct overall;
    XTextExtents ((XFontStruct*) pFontStruct, "x", 1, &direction, &ascent,
        &descent, &overall);

    return overall.width;
}

void wxWindowX11::GetTextExtent(const wxString& string,
                             int *x, int *y,
                             int *descent, int *externalLeading,
                             const wxFont *theFont) const
{
    wxFont *fontToUse = (wxFont *)theFont;
    if (!fontToUse)
        fontToUse = (wxFont *) & m_font;

    wxCHECK_RET( fontToUse->Ok(), "valid window font needed" );
    
    WXFontStructPtr pFontStruct = theFont->GetFontStruct(1.0, GetXDisplay());

    int direction, ascent, descent2;
    XCharStruct overall;
    int slen = string.Len();

#if 0
    if (use16)
        XTextExtents16((XFontStruct*) pFontStruct, (XChar2b *) (char*) (const char*) string, slen, &direction,
        &ascent, &descent2, &overall);
#endif

    XTextExtents((XFontStruct*) pFontStruct, string, slen,
                 &direction, &ascent, &descent2, &overall);

    if ( x )
        *x = (overall.width);
    if ( y )
        *y = (ascent + descent2);
    if (descent)
        *descent = descent2;
    if (externalLeading)
        *externalLeading = 0;

}

// ----------------------------------------------------------------------------
// painting
// ----------------------------------------------------------------------------

void wxWindowX11::Refresh(bool eraseBack, const wxRect *rect)
{
    if (eraseBack)
    {
        if (rect)
        {
            // Schedule for later Updating in ::Update() or ::OnInternalIdle().
            m_clearRegion.Union( rect->x, rect->y, rect->width, rect->height );
        }
        else
        {
            int height,width;
            GetSize( &width, &height );
            
            // Schedule for later Updating in ::Update() or ::OnInternalIdle().
            m_clearRegion.Clear();
            m_clearRegion.Union( 0, 0, width, height );
        }
    }

    if (rect)
    {
         // Schedule for later Updating in ::Update() or ::OnInternalIdle().
         m_updateRegion.Union( rect->x, rect->y, rect->width, rect->height );
    }
    else
    {
       int height,width;
       GetSize( &width, &height );
            
        // Schedule for later Updating in ::Update() or ::OnInternalIdle().
        m_updateRegion.Clear();
        m_updateRegion.Union( 0, 0, width, height );
    }
    
    // Actually don't schedule yet..
    Update();
}

void wxWindowX11::Update()
{
    if (!m_updateRegion.IsEmpty())
    {
        X11SendPaintEvents();
    }
}

void wxWindowX11::Clear()
{
    wxClientDC dc((wxWindow*) this);
    wxBrush brush(GetBackgroundColour(), wxSOLID);
    dc.SetBackground(brush);
    dc.Clear();
}

void wxWindowX11::X11SendPaintEvents()
{
    m_clipPaintRegion = TRUE;

    if (!m_clearRegion.IsEmpty())
    {
        wxWindowDC dc( (wxWindow*)this );
        dc.SetClippingRegion( m_clearRegion );
        
        wxEraseEvent erase_event( GetId(), &dc );
        erase_event.SetEventObject( this );
    
        if (!GetEventHandler()->ProcessEvent(erase_event))
        {
            wxRegionIterator upd( m_clearRegion );
            while (upd)
            {
                // XClearArea( ... , upd.GetX(), upd.GetY(), upd.GetWidth(), upd.GetHeight() );
                upd ++;
            }
        }
        m_clearRegion.Clear();
    }

    wxNcPaintEvent nc_paint_event( GetId() );
    nc_paint_event.SetEventObject( this );
    GetEventHandler()->ProcessEvent( nc_paint_event );

    wxPaintEvent paint_event( GetId() );
    paint_event.SetEventObject( this );
    GetEventHandler()->ProcessEvent( paint_event );

    m_clipPaintRegion = FALSE;
}

// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------

// Responds to colour changes: passes event on to children.
void wxWindowX11::OnSysColourChanged(wxSysColourChangedEvent& event)
{
    wxWindowList::Node *node = GetChildren().GetFirst();
    while ( node )
    {
        // Only propagate to non-top-level windows
        wxWindow *win = node->GetData();
        if ( win->GetParent() )
        {
            wxSysColourChangedEvent event2;
            event.m_eventObject = win;
            win->GetEventHandler()->ProcessEvent(event2);
        }

        node = node->GetNext();
    }
}

void wxWindowX11::OnIdle(wxIdleEvent& WXUNUSED(event))
{
    // This calls the UI-update mechanism (querying windows for
    // menu/toolbar/control state information)
    UpdateWindowUI();
}

// ----------------------------------------------------------------------------
// function which maintain the global hash table mapping Widgets to wxWindows
// ----------------------------------------------------------------------------

bool wxAddWindowToTable(Window w, wxWindow *win)
{
    wxWindow *oldItem = NULL;
    if ((oldItem = (wxWindow *)wxWidgetHashTable->Get ((long) w)))
    {
        wxLogDebug("Widget table clash: new widget is %ld, %s",
                   (long)w, win->GetClassInfo()->GetClassName());
        return FALSE;
    }

    wxWidgetHashTable->Put((long) w, win);

    wxLogTrace("widget", "XWindow 0x%08x <-> window %p (%s)",
               w, win, win->GetClassInfo()->GetClassName());

    return TRUE;
}

wxWindow *wxGetWindowFromTable(Window w)
{
    return (wxWindow *)wxWidgetHashTable->Get((long) w);
}

void wxDeleteWindowFromTable(Window w)
{
    wxWidgetHashTable->Delete((long)w);
}

// ----------------------------------------------------------------------------
// add/remove window from the table
// ----------------------------------------------------------------------------

// ----------------------------------------------------------------------------
// X11-specific accessors
// ----------------------------------------------------------------------------

// Get the underlying X window
WXWindow wxWindowX11::GetXWindow() const
{
    return GetMainWindow();
}

// Get the underlying X display
WXDisplay *wxWindowX11::GetXDisplay() const
{
    return wxGetDisplay();
}

WXWindow wxWindowX11::GetMainWindow() const
{
    return m_mainWidget;
}

// ----------------------------------------------------------------------------
// TranslateXXXEvent() functions
// ----------------------------------------------------------------------------

bool wxTranslateMouseEvent(wxMouseEvent& wxevent, wxWindow *win, Window window, XEvent *xevent)
{
    switch (xevent->xany.type)
    {
        case EnterNotify:
        case LeaveNotify:
        case ButtonPress:
        case ButtonRelease:
        case MotionNotify:
        {
            wxEventType eventType = wxEVT_NULL;

            if (xevent->xany.type == EnterNotify)
            {
                //if (local_event.xcrossing.mode!=NotifyNormal)
                //  return ; // Ignore grab events
                eventType = wxEVT_ENTER_WINDOW;
                //            canvas->GetEventHandler()->OnSetFocus();
            }
            else if (xevent->xany.type == LeaveNotify)
            {
                //if (local_event.xcrossingr.mode!=NotifyNormal)
                //  return ; // Ignore grab events
                eventType = wxEVT_LEAVE_WINDOW;
                //            canvas->GetEventHandler()->OnKillFocus();
            }
            else if (xevent->xany.type == MotionNotify)
            {
                eventType = wxEVT_MOTION;
            }
            else if (xevent->xany.type == ButtonPress)
            {
                wxevent.SetTimestamp(xevent->xbutton.time);
                int button = 0;
                if (xevent->xbutton.button == Button1)
                {
                    eventType = wxEVT_LEFT_DOWN;
                    button = 1;
                }
                else if (xevent->xbutton.button == Button2)
                {
                    eventType = wxEVT_MIDDLE_DOWN;
                    button = 2;
                }
                else if (xevent->xbutton.button == Button3)
                {
                    eventType = wxEVT_RIGHT_DOWN;
                    button = 3;
                }

                // check for a double click
                // TODO: where can we get this value from?
                //long dclickTime = XtGetMultiClickTime(wxGlobalDisplay());
                long dclickTime = 200;
                long ts = wxevent.GetTimestamp();

                int buttonLast = win->GetLastClickedButton();
                long lastTS = win->GetLastClickTime();
                if ( buttonLast && buttonLast == button && (ts - lastTS) < dclickTime )
                {
                    // I have a dclick
                    win->SetLastClick(0, ts);
                    if ( eventType == wxEVT_LEFT_DOWN )
                        eventType = wxEVT_LEFT_DCLICK;
                    else if ( eventType == wxEVT_MIDDLE_DOWN )
                        eventType = wxEVT_MIDDLE_DCLICK;
                    else if ( eventType == wxEVT_RIGHT_DOWN )
                        eventType = wxEVT_RIGHT_DCLICK;
                }
                else
                {
                    // not fast enough or different button
                    win->SetLastClick(button, ts);
                }
            }
            else if (xevent->xany.type == ButtonRelease)
            {
                if (xevent->xbutton.button == Button1)
                {
                    eventType = wxEVT_LEFT_UP;
                }
                else if (xevent->xbutton.button == Button2)
                {
                    eventType = wxEVT_MIDDLE_UP;
                }
                else if (xevent->xbutton.button == Button3)
                {
                    eventType = wxEVT_RIGHT_UP;
                }
                else return FALSE;
            }
            else
            {
                return FALSE;
            }

            wxevent.SetEventType(eventType);

            wxevent.m_x = xevent->xbutton.x;
            wxevent.m_y = xevent->xbutton.y;

            wxevent.m_leftDown = ((eventType == wxEVT_LEFT_DOWN)
                || (event_left_is_down (xevent)
                && (eventType != wxEVT_LEFT_UP)));
            wxevent.m_middleDown = ((eventType == wxEVT_MIDDLE_DOWN)
                || (event_middle_is_down (xevent)
                && (eventType != wxEVT_MIDDLE_UP)));
            wxevent.m_rightDown = ((eventType == wxEVT_RIGHT_DOWN)
                || (event_right_is_down (xevent)
                && (eventType != wxEVT_RIGHT_UP)));

            wxevent.m_shiftDown = xevent->xbutton.state & ShiftMask;
            wxevent.m_controlDown = xevent->xbutton.state & ControlMask;
            wxevent.m_altDown = xevent->xbutton.state & Mod3Mask;
            wxevent.m_metaDown = xevent->xbutton.state & Mod1Mask;

            wxevent.SetId(win->GetId());
            wxevent.SetEventObject(win);

            return TRUE;
        }
    }
    return FALSE;
}

bool wxTranslateKeyEvent(wxKeyEvent& wxevent, wxWindow *win, Window WXUNUSED(win), XEvent *xevent)
{
    switch (xevent->xany.type)
    {
    case KeyPress:
    case KeyRelease:
        {
            char buf[20];

            KeySym keySym;
            (void) XLookupString ((XKeyEvent *) xevent, buf, 20, &keySym, NULL);
            int id = wxCharCodeXToWX (keySym);

            if (xevent->xkey.state & ShiftMask)
                wxevent.m_shiftDown = TRUE;
            if (xevent->xkey.state & ControlMask)
                wxevent.m_controlDown = TRUE;
            if (xevent->xkey.state & Mod3Mask)
                wxevent.m_altDown = TRUE;
            if (xevent->xkey.state & Mod1Mask)
                wxevent.m_metaDown = TRUE;
            wxevent.SetEventObject(win);
            wxevent.m_keyCode = id;
            wxevent.SetTimestamp(xevent->xkey.time);

            wxevent.m_x = xevent->xbutton.x;
            wxevent.m_y = xevent->xbutton.y;

            if (id > -1)
                return TRUE;
            else
                return FALSE;
            break;
        }
    default:
        break;
    }
    return FALSE;
}

// ----------------------------------------------------------------------------
// Colour stuff
// ----------------------------------------------------------------------------

#if 0

#define YAllocColor XAllocColor
XColor g_itemColors[5];
int wxComputeColours (Display *display, wxColour * back, wxColour * fore)
{
    int result;
    static XmColorProc colorProc;

    result = wxNO_COLORS;

    if (back)
    {
        g_itemColors[0].red = (((long) back->Red ()) << 8);
        g_itemColors[0].green = (((long) back->Green ()) << 8);
        g_itemColors[0].blue = (((long) back->Blue ()) << 8);
        g_itemColors[0].flags = DoRed | DoGreen | DoBlue;
        if (colorProc == (XmColorProc) NULL)
        {
            // Get a ptr to the actual function
            colorProc = XmSetColorCalculation ((XmColorProc) NULL);
            // And set it back to motif.
            XmSetColorCalculation (colorProc);
        }
        (*colorProc) (&g_itemColors[wxBACK_INDEX],
            &g_itemColors[wxFORE_INDEX],
            &g_itemColors[wxSELE_INDEX],
            &g_itemColors[wxTOPS_INDEX],
            &g_itemColors[wxBOTS_INDEX]);
        result = wxBACK_COLORS;
    }
    if (fore)
    {
        g_itemColors[wxFORE_INDEX].red = (((long) fore->Red ()) << 8);
        g_itemColors[wxFORE_INDEX].green = (((long) fore->Green ()) << 8);
        g_itemColors[wxFORE_INDEX].blue = (((long) fore->Blue ()) << 8);
        g_itemColors[wxFORE_INDEX].flags = DoRed | DoGreen | DoBlue;
        if (result == wxNO_COLORS)
            result = wxFORE_COLORS;
    }

    Display *dpy = display;
    Colormap cmap = (Colormap) wxTheApp->GetMainColormap((WXDisplay*) dpy);

    if (back)
    {
        /* 5 Colours to allocate */
        for (int i = 0; i < 5; i++)
            if (!YAllocColor (dpy, cmap, &g_itemColors[i]))
                result = wxNO_COLORS;
    }
    else if (fore)
    {
        /* Only 1 colour to allocate */
        if (!YAllocColor (dpy, cmap, &g_itemColors[wxFORE_INDEX]))
            result = wxNO_COLORS;
    }

    return (result);

}
#endif

bool wxWindowX11::SetBackgroundColour(const wxColour& col)
{
    if ( !wxWindowBase::SetBackgroundColour(col) )
        return FALSE;

    if (!GetMainWindow())
        return FALSE;

    wxColour colour( col );
    XSetWindowAttributes attrib;
    attrib.background_pixel = colour.AllocColour(wxGlobalDisplay());

    XChangeWindowAttributes(wxGlobalDisplay(),
        (Window) GetMainWindow(),
        CWBackPixel,
        & attrib);

    return TRUE;
}

bool wxWindowX11::SetForegroundColour(const wxColour& col)
{
    if ( !wxWindowBase::SetForegroundColour(col) )
        return FALSE;

    return TRUE;
}

// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------

wxWindow *wxGetActiveWindow()
{
    // TODO
    wxFAIL_MSG("Not implemented");
    return NULL;
}

/* static */
wxWindow *wxWindowBase::GetCapture()
{
    return (wxWindow *)g_captureWindow;
}


// Find the wxWindow at the current mouse position, returning the mouse
// position.
wxWindow* wxFindWindowAtPointer(wxPoint& pt)
{
    return wxFindWindowAtPoint(wxGetMousePosition());
}

// Get the current mouse position.
wxPoint wxGetMousePosition()
{
    Display *display = wxGlobalDisplay();
    Window rootWindow = RootWindowOfScreen (DefaultScreenOfDisplay(display));
    Window rootReturn, childReturn;
    int rootX, rootY, winX, winY;
    unsigned int maskReturn;

    XQueryPointer (display,
		   rootWindow,
		   &rootReturn,
                   &childReturn,
                   &rootX, &rootY, &winX, &winY, &maskReturn);
    return wxPoint(rootX, rootY);
}


// ----------------------------------------------------------------------------
// wxNoOptimize: switch off size optimization
// ----------------------------------------------------------------------------

int wxNoOptimize::ms_count = 0;