added a section on when to delete global objects

[wxWidgets.git] / include / wx / motif / window.h

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

#ifndef _WX_WINDOW_H_
#define _WX_WINDOW_H_

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

#include "wx/region.h"

// ----------------------------------------------------------------------------
// wxWindow class for Motif - see also wxWindowBase
// ----------------------------------------------------------------------------

class wxWindow : public wxWindowBase
{
    friend class WXDLLEXPORT wxDC;
    friend class WXDLLEXPORT wxWindowDC;
    
public:
    wxWindow() { Init(); }
    
    wxWindow(wxWindow *parent,
        wxWindowID id,
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize,
        long style = 0,
        const wxString& name = wxPanelNameStr)
    {
        Init();
        Create(parent, id, pos, size, style, name);
    }
    
    virtual ~wxWindow();
    
    bool Create(wxWindow *parent,
        wxWindowID id,
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize,
        long style = 0,
        const wxString& name = wxPanelNameStr);
    
    // implement base class pure virtuals
    virtual void SetTitle( const wxString& title);
    virtual wxString GetTitle() const;
    
    virtual void Raise();
    virtual void Lower();
    
    virtual bool Show( bool show = TRUE );
    virtual bool Enable( bool enable = TRUE );
    
    virtual void SetFocus();
    
    virtual void WarpPointer(int x, int y);
    
    virtual void Refresh( bool eraseBackground = TRUE,
        const wxRect *rect = (const wxRect *) NULL );
    virtual void Clear();
    
    virtual bool SetBackgroundColour( const wxColour &colour );
    virtual bool SetForegroundColour( const wxColour &colour );
    
    virtual bool SetCursor( const wxCursor &cursor );
    virtual bool SetFont( const wxFont &font );
    
    virtual int GetCharHeight() const;
    virtual int GetCharWidth() const;
    virtual void GetTextExtent(const wxString& string,
        int *x, int *y,
        int *descent = (int *) NULL,
        int *externalLeading = (int *) NULL,
        const wxFont *theFont = (const wxFont *) NULL)
        const;
    
    virtual void SetScrollbar( int orient, int pos, int thumbVisible,
        int range, bool refresh = TRUE );
    virtual void SetScrollPos( int orient, int pos, bool refresh = TRUE );
    virtual int GetScrollPos( int orient ) const;
    virtual int GetScrollThumb( int orient ) const;
    virtual int GetScrollRange( int orient ) const;
    virtual void ScrollWindow( int dx, int dy,
        const wxRect* rect = (wxRect *) NULL );
    
    virtual void SetSizeHints(int minW, int minH,
        int maxW = -1, int maxH = -1,
        int incW = -1, int incH = -1);
#if wxUSE_DRAG_AND_DROP
    virtual void SetDropTarget( wxDropTarget *dropTarget );
#endif // wxUSE_DRAG_AND_DROP
    
    // Accept files for dragging
    virtual void DragAcceptFiles(bool accept);
    
    // Get the unique identifier of a window
    virtual WXWidget GetHandle() const { return GetMainWidget(); }
    
    // implementation from now on
    // --------------------------
    
    // accessors
    // ---------
    
    // Get main widget for this window, e.g. a text widget
    virtual WXWidget GetMainWidget() const;
    // Get the widget that corresponds to the label (for font setting, label setting etc.)
    virtual WXWidget GetLabelWidget() const;
    // Get the client widget for this window (something we can create other
    // windows on)
    virtual WXWidget GetClientWidget() const;
    // Get the top widget for this window, e.g. the scrolled widget parent of a
    // multi-line text widget. Top means, top in the window hierarchy that
    // implements this window.
    virtual WXWidget GetTopWidget() const;
    
    // Get the underlying X window and display
    WXWindow GetXWindow() const;
    WXDisplay *GetXDisplay() const;
    
    // called from Motif callbacks - and should only be called from there
    
    void SetButton1(bool pressed) { m_button1Pressed = pressed; }
    void SetButton2(bool pressed) { m_button2Pressed = pressed; }
    void SetButton3(bool pressed) { m_button3Pressed = pressed; }
    
    void SetLastClick(int button, long timestamp)
    { m_lastButton = button; m_lastTS = timestamp; }
    
    int GetLastClickedButton() const { return m_lastButton; }
    long GetLastClickTime() const { return m_lastTS; }
    
    // Gives window a chance to do something in response to a size message, e.g.
    // arrange status bar, toolbar etc.
    virtual bool PreResize();
    
    // Generates a paint event
    virtual void DoPaint();
    
    // update rectangle/region manipulation
    // (for wxWindowDC and Motif callbacks only)
    // -----------------------------------------
    
    // read/write access to the update rect list
    const wxRectList& GetUpdateRects() const { return m_updateRects; }
    
    // Adds a recangle to the updates list
    void AddUpdateRect(int x, int y, int w, int h)
    { m_updateRects.Append(new wxRect(x, y, w, h)); }
    
    // Empties the m_updateRects list
    void ClearUpdateRects();
    
    void ClearUpdateRegion() { m_updateRegion.Clear(); }
    void SetUpdateRegion(const wxRegion& region) { m_updateRegion = region; }
    
    // sets the fore/background colour for the given widget
    static void DoChangeForegroundColour(WXWidget widget, wxColour& foregroundColour);
    static void DoChangeBackgroundColour(WXWidget widget, wxColour& backgroundColour, bool changeArmColour = FALSE);
    
    // For implementation purposes - sometimes decorations make the client area
    // smaller
    virtual wxPoint GetClientAreaOrigin() const;
    
protected:
    // event handlers (not virtual by design)
    void OnIdle(wxIdleEvent& event);
    
    wxWindow *GetChild(int number) const
    { return GetChildren().Item(number)->GetData(); }
    
    // Responds to colour changes: passes event on to children.
    void OnSysColourChanged(wxSysColourChangedEvent& event);
    
    // Motif-specific
    
    // CanvasXXXSiize functions
    void CanvasGetSize(int* width, int* height) const; // If have drawing area
    void CanvasGetClientSize(int *width, int *height) const;
    void CanvasGetPosition(int *x, int *y) const; // If have drawing area
    void CanvasSetClientSize(int width, int size);
    void CanvasSetSize(int x, int y, int width, int height, int sizeFlags = wxSIZE_AUTO);
    
    void SetMainWidget(WXWidget w) { m_mainWidget = w; }
    
    bool CanAddEventHandler() const { return m_canAddEventHandler; }
    void SetCanAddEventHandler(bool flag) { m_canAddEventHandler = flag; }
    
public:
    WXPixmap GetBackingPixmap() const { return m_backingPixmap; }
    void SetBackingPixmap(WXPixmap pixmap) { m_backingPixmap = pixmap; }
    int GetPixmapWidth() const { return m_pixmapWidth; }
    int GetPixmapHeight() const { return m_pixmapHeight; }
    void SetPixmapWidth(int w) { m_pixmapWidth = w; }
    void SetPixmapHeight(int h) { m_pixmapHeight = h; }
    
    // Change properties
    virtual void ChangeFont(bool keepOriginalSize = TRUE);             // Change to the current font (often overridden)
    
    // Change background and foreground colour using current background colour
    // setting (Motif generates foreground based on background)
    virtual void ChangeBackgroundColour();
    // Change foreground colour using current foreground colour setting
    virtual void ChangeForegroundColour();
    
protected:
    // Adds the widget to the hash table and adds event handlers.
    bool AttachWidget(wxWindow* parent, WXWidget mainWidget,
        WXWidget formWidget, int x, int y, int width, int height);
    bool DetachWidget(WXWidget widget);
    
    // How to implement accelerators. If we find a key event, translate to
    // wxWindows wxKeyEvent form. Find a widget for the window. Now find a
    // wxWindow for the widget. If there isn't one, go up the widget hierarchy
    // trying to find one. Once one is found, call ProcessAccelerator for the
    // window. If it returns TRUE (processed the event), skip the X event,
    // otherwise carry on up the wxWindows window hierarchy calling
    // ProcessAccelerator. If all return FALSE, process the X event as normal.
    // Eventually we can implement OnCharHook the same way, but concentrate on
    // accelerators for now. ProcessAccelerator must look at the current
    // accelerator table, and try to find what menu id or window (beneath it)
    // has this ID. Then construct an appropriate command
    // event and send it.
public:
    virtual bool ProcessAccelerator(wxKeyEvent& event);
    
protected:
    // unmanage and destroy an X widget f it's !NULL (passing NULL is ok)
    void UnmanageAndDestroy(WXWidget widget);
    
    // map or unmap an X widget (passing NULL is ok), returns TRUE if widget was
    // mapped/unmapped
    bool MapOrUnmap(WXWidget widget, bool map);
    
    // scrolling stuff
    // ---------------
    
    // create/destroy window scrollbars
    void CreateScrollbar(wxOrientation orientation);
    void DestroyScrollbar(wxOrientation orientation);
    
    // get either hor or vert scrollbar widget
    WXWidget GetScrollbar(wxOrientation orient) const
    { return orient == wxHORIZONTAL ? m_hScrollBar : m_vScrollBar; }
    
    // set the scroll pos
    void SetInternalScrollPos(wxOrientation orient, int pos)
    {
        if ( orient == wxHORIZONTAL )
            m_scrollPosX = pos;
        else
            m_scrollPosY = pos;
    }
    
    // Motif-specific flags
    // --------------------
    
    bool m_needsRefresh:1;          // repaint backing store?
    bool m_canAddEventHandler:1;    // ???
    bool m_button1Pressed:1;
    bool m_button2Pressed:1;
    bool m_button3Pressed:1;
    
    // For double-click detection
    long   m_lastTS;         // last timestamp
    int    m_lastButton;     // last pressed button
    
    // List of wxRects representing damaged region
    wxRectList m_updateRects;
    
protected:
    WXWidget              m_mainWidget;
    WXWidget              m_hScrollBar;
    WXWidget              m_vScrollBar;
    WXWidget              m_borderWidget;
    WXWidget              m_scrolledWindow;
    WXWidget              m_drawingArea;
    bool                  m_winCaptured;
    bool                  m_hScroll;
    bool                  m_vScroll;
    WXPixmap              m_backingPixmap;
    int                   m_pixmapWidth;
    int                   m_pixmapHeight;
    int                   m_pixmapOffsetX;
    int                   m_pixmapOffsetY;
    
    // Store the last scroll pos, since in wxWin the pos isn't set automatically
    // by system
    int                   m_scrollPosX;
    int                   m_scrollPosY;
    
    // implement the base class pure virtuals
    virtual void DoClientToScreen( int *x, int *y ) const;
    virtual void DoScreenToClient( int *x, int *y ) const;
    virtual void DoGetPosition( int *x, int *y ) const;
    virtual void DoGetSize( int *width, int *height ) const;
    virtual void DoGetClientSize( int *width, int *height ) const;
    virtual void DoSetSize(int x, int y,
        int width, int height,
        int sizeFlags = wxSIZE_AUTO);
    virtual void DoSetClientSize(int width, int height);
    virtual void DoMoveWindow(int x, int y, int width, int height);
    virtual bool DoPopupMenu(wxMenu *menu, int x, int y);
    virtual void DoCaptureMouse();
    virtual void DoReleaseMouse();
    
#if wxUSE_TOOLTIPS
    virtual void DoSetToolTip( wxToolTip *tip );
#endif // wxUSE_TOOLTIPS
    
private:
    // common part of all ctors
    void Init();
    
    DECLARE_DYNAMIC_CLASS(wxWindow)
    DECLARE_NO_COPY_CLASS(wxWindow)
    DECLARE_EVENT_TABLE()
};

// ----------------------------------------------------------------------------
// A little class to switch off `size optimization' while an instance of the
// object exists: this may be useful to temporarily disable the optimisation
// which consists to do nothing when the new size is equal to the old size -
// although quite useful usually to avoid flicker, sometimes it leads to
// undesired effects.
//
// Usage: create an instance of this class on the stack to disable the size
// optimisation, it will be reenabled as soon as the object goes out from scope.
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxNoOptimize
{
public:
    wxNoOptimize() { ms_count++; }
    ~wxNoOptimize() { ms_count--; }
    
    static bool CanOptimize() { return ms_count == 0; }
    
protected:
    static int ms_count;
};

#endif
// _WX_WINDOW_H_