samples/richedit/wxlwindow.h

   1 /*-*- c++ -*-********************************************************
   2  * wxLwindow.h : a scrolled Window for displaying/entering rich text*
   3  *                                                                  *
   4  * (C) 1998,1999 by Karsten Ballüder (Ballueder@usa.net)            *
   5  *                                                                  *
   6  * $Id$
   7  *******************************************************************/
   8 #ifndef WXLWINDOW_H
   9 #define WXLWINDOW_H
  10
  11 #ifdef __GNUG__
  12 #   pragma interface "wxlwindow.h"
  13 #endif
  14
  15 #ifndef USE_PCH
  16 #  include   <wx/wx.h>
  17 #endif
  18
  19 #include "wxllist.h"
  20
  21 #ifndef WXLOWIN_MENU_FIRST
  22 #   define WXLOWIN_MENU_FIRST 12000
  23 #endif
  24
  25
  26 #define wxUSE_PRIVATE_CLIPBOARD_FORMAT 1
  27
  28 enum
  29 {
  30    WXLOWIN_MENU_LARGER = WXLOWIN_MENU_FIRST,
  31    WXLOWIN_MENU_SMALLER,
  32    WXLOWIN_MENU_UNDERLINE,
  33    WXLOWIN_MENU_BOLD,
  34    WXLOWIN_MENU_ITALICS,
  35    WXLOWIN_MENU_ROMAN,
  36    WXLOWIN_MENU_TYPEWRITER,
  37    WXLOWIN_MENU_SANSSERIF,
  38    WXLOWIN_MENU_RCLICK,
  39    WXLOWIN_MENU_LCLICK,
  40    WXLOWIN_MENU_DBLCLICK,
  41    WXLOWIN_MENU_MOUSEMOVE,
  42    WXLOWIN_MENU_LAST = WXLOWIN_MENU_MOUSEMOVE
  43 };
  44
  45 /**
  46    This class is a rich text editing widget.
  47 */
  48 class wxLayoutWindow : public wxScrolledWindow
  49 {
  50 public:
  51    /** Constructor.
  52        @param parent parent window to display this panel in
  53    */
  54    wxLayoutWindow(wxWindow *parent);
  55
  56    /// Destructor.
  57    virtual ~wxLayoutWindow();
  58
  59    /**@name Editing functionality */
  60    //@{
  61    /// Clears the window and sets default parameters.
  62    void Clear(int family = wxROMAN,
  63               int size=12,
  64               int style=wxNORMAL,
  65               int weight=wxNORMAL,
  66               int underline=0,
  67               wxColour *fg=NULL,
  68               wxColour *bg=NULL);
  69    /** Sets a background image, only used on screen, not on printouts.
  70        @param bitmap a pointer to a wxBitmap or NULL to remove it
  71    */
  72    void SetBackgroundBitmap(wxBitmap *bitmap = NULL)
  73       {
  74          if(m_BGbitmap) delete m_BGbitmap;
  75          m_BGbitmap = bitmap;
  76       }
  77    /// Enable or disable editing, i.e. processing of keystrokes.
  78    void SetEditable(bool toggle) { m_Editable = toggle; }
  79    /// Query whether list can be edited by user.
  80    bool IsEditable(void) const { return m_Editable; }
  81    /** Sets cursor visibility, visible=1, invisible=0,
  82        visible-on-demand=-1, to hide it until moved.
  83        @param visibility -1,0 or 1
  84        @return the old visibility
  85    */
  86    inline int SetCursorVisibility(int visibility = -1)
  87       { int v =m_CursorVisibility;
  88       m_CursorVisibility = visibility; return v;}
  89
  90    /// Pastes text from clipboard.
  91    void Paste(void);
  92    /** Copies selection to clipboard.
  93        @param invalidate used internally, see wxllist.h for details
  94    */
  95    bool Copy(bool invalidate = true);
  96    /// Copies selection to clipboard and deletes it.
  97    bool Cut(void);
  98    //@}
  99
 100    bool Find(const wxString &needle,
 101              wxPoint * fromWhere = NULL);
 102
 103    void EnablePopup(bool enable = true) { m_DoPopupMenu = enable; }
 104
 105    /** Sets the wrap margin.
 106        @param margin set this to 0 to disable it
 107    */
 108    void SetWrapMargin(CoordType margin) { m_WrapMargin = margin; }
 109
 110    /** Redraws the window.
 111        Internally, this stores the parameter and calls a refresh on
 112        wxMSW, draws directly on wxGTK.
 113    */
 114    void DoPaint(const wxRect *updateRect = NULL);
 115
 116    /// if exact == false, assume 50% extra size for the future
 117    void ResizeScrollbars(bool exact = false);  // don't change this to true!
 118
 119    /// if the flag is true, we send events when user clicks on embedded objects
 120    inline void SetMouseTracking(bool doIt = true) { m_doSendEvents = doIt; }
 121
 122    /* Returns a pointer to the wxLayoutList object.
 123       @return the list
 124    */
 125    wxLayoutList * GetLayoutList(void) { return m_llist; }
 126
 127    /**@name Callbacks */
 128    //@{
 129    void OnPaint(wxPaintEvent &event);
 130    void OnChar(wxKeyEvent& event);
 131    void OnKeyUp(wxKeyEvent& event);
 132    void OnUpdateMenuUnderline(wxUpdateUIEvent& event);
 133    void OnUpdateMenuBold(wxUpdateUIEvent& event);
 134    void OnUpdateMenuItalic(wxUpdateUIEvent& event);
 135    void OnMenu(wxCommandEvent& event);
 136    void OnLeftMouseClick(wxMouseEvent& event)  { OnMouse(WXLOWIN_MENU_LCLICK, event); }
 137    void OnRightMouseClick(wxMouseEvent& event) { OnMouse(WXLOWIN_MENU_RCLICK, event); }
 138    void OnMouseDblClick(wxMouseEvent& event)   { OnMouse(WXLOWIN_MENU_DBLCLICK, event); }
 139    void OnMouseMove(wxMouseEvent &event)       { OnMouse(WXLOWIN_MENU_MOUSEMOVE, event) ; }
 140    void OnSetFocus(wxFocusEvent &ev);
 141    void OnKillFocus(wxFocusEvent &ev);
 142    //@}
 143
 144    /// Creates a wxMenu for use as a format popup.
 145    static wxMenu * MakeFormatMenu(void);
 146    /**@name Dirty flag handling for optimisations. */
 147    //@{
 148    /// Set dirty flag.
 149    void SetDirty(void) { m_Dirty = true; }
 150    /// Query whether window needs redrawing.
 151    bool IsDirty(void) const { return m_Dirty; }
 152    /// Reset dirty flag.
 153    void ResetDirty(void) { m_Dirty = false; }
 154    //@}
 155    /// Redraws the window, used by DoPaint() or OnPaint().
 156    void InternalPaint(const wxRect *updateRect);
 157
 158    /// Has list been modified/edited?
 159    bool IsModified(void) const { return m_Modified; }
 160    /// Mark list as modified or unchanged.
 161    void SetModified(bool modified = true) { m_Modified = modified; }
 162    /** Tell window to update a wxStatusBar with UserData labels and
 163        cursor positions.
 164        @param bar wxStatusBar pointer
 165        @param labelfield field to use in statusbar for URLs/userdata labels, or -1 to disable
 166        @param cursorfield field to use for cursor position, or -1 to disable
 167    */
 168    void SetStatusBar(class wxStatusBar *bar,
 169                        int labelfield = -1,
 170                        int cursorfield = -1)
 171       {
 172          m_StatusBar = bar; m_StatusFieldLabel = labelfield;
 173          m_StatusFieldCursor = cursorfield;
 174       }
 175
 176 protected:
 177    /// generic function for mouse events processing
 178    void OnMouse(int eventId, wxMouseEvent& event);
 179    /// as the name says
 180    void ScrollToCursor(void);
 181    /// for sending events
 182    wxWindow *m_Parent;
 183    /// Shall we send events?
 184    bool m_doSendEvents;
 185    /// Where does the current view start?
 186    int m_ViewStartX; int m_ViewStartY;
 187    /// Do we currently have the focus?
 188    bool m_HaveFocus;
 189    /// do we handle clicks of the right mouse button?
 190    bool m_DoPopupMenu;
 191    /// Should InternalPaint() scroll to cursor (VZ: seems unused any more)
 192    bool m_ScrollToCursor;
 193    /// Do we currently have a non-standard cursor?
 194    bool m_HandCursor;
 195    /// the menu
 196    wxMenu * m_PopupMenu;
 197    /// for derived classes, set when mouse is clicked
 198    wxPoint m_ClickPosition;
 199    /// for scrollbar calculations:
 200    int m_maxx;
 201    int m_maxy;
 202    int m_lineHeight;
 203    /** Visibility parameter for cursor. 0/1 as expected, -1: visible
 204        on demand.
 205    */
 206    int m_CursorVisibility;
 207 private:
 208    /// The layout list to be displayed.
 209    wxLayoutList *m_llist;
 210    /// Can user edit the window?
 211    bool m_Editable;
 212    /// Are we currently building a selection with the keyboard?
 213    bool m_Selecting;
 214    /// wrap margin
 215    CoordType    m_WrapMargin;
 216    /// Is list dirty (for redraws, internal use)?
 217    bool         m_Dirty;
 218    /// Has list been edited?
 219    bool         m_Modified;
 220    wxMemoryDC  *m_memDC;
 221    wxBitmap    *m_bitmap;
 222    wxPoint      m_bitmapSize;
 223    /// A frame's statusbar to update
 224    class wxStatusBar *m_StatusBar;
 225    /// statusbar field for labels
 226    int          m_StatusFieldLabel;
 227    /// statusbar field for cursor positions
 228    int          m_StatusFieldCursor;
 229    /// a pointer to a bitmap for the background
 230    wxBitmap    *m_BGbitmap;
 231    DECLARE_EVENT_TABLE()
 232 };
 233
 234 #endif