include/wx/msw/listctrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/listctrl.h
   3 // Purpose:     wxListCtrl class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_LISTCTRL_H_
  13 #define _WX_LISTCTRL_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "listctrl.h"
  17 #endif
  18
  19 #if wxUSE_LISTCTRL
  20
  21 #include "wx/control.h"
  22 #include "wx/event.h"
  23 #include "wx/hash.h"
  24 #include "wx/textctrl.h"
  25
  26
  27 class WXDLLEXPORT wxImageList;
  28
  29 /*
  30     The wxListCtrl can show lists of items in four different modes:
  31     wxLC_LIST:   multicolumn list view, with optional small icons (icons could be
  32                  optional for some platforms). Columns are computed automatically,
  33                  i.e. you don't set columns as in wxLC_REPORT. In other words,
  34                  the list wraps, unlike a wxListBox.
  35     wxLC_REPORT: single or multicolumn report view (with optional header)
  36     wxLC_ICON:   large icon view, with optional labels
  37     wxLC_SMALL_ICON: small icon view, with optional labels
  38
  39     You can change the style dynamically, either with SetSingleStyle or
  40     SetWindowStyleFlag.
  41
  42     Further window styles:
  43
  44     wxLC_ALIGN_TOP          icons align to the top (default)
  45     wxLC_ALIGN_LEFT         icons align to the left
  46     wxLC_AUTOARRANGE        icons arrange themselves
  47     wxLC_USER_TEXT          the app provides label text on demand, except for column headers
  48     wxLC_EDIT_LABELS        labels are editable: app will be notified.
  49     wxLC_NO_HEADER          no header in report mode
  50     wxLC_NO_SORT_HEADER     can't click on header
  51     wxLC_SINGLE_SEL         single selection
  52     wxLC_SORT_ASCENDING     sort ascending (must still supply a comparison callback in SortItems)
  53     wxLC_SORT_DESCENDING    sort descending (ditto)
  54
  55     Items are referred to by their index (position in the list starting from zero).
  56
  57     Label text is supplied via insertion/setting functions and is stored by the
  58     control, unless the wxLC_USER_TEXT style has been specified, in which case
  59     the app will be notified when text is required (see sample).
  60
  61     Images are dealt with by (optionally) associating 3 image lists with the control.
  62     Zero-based indexes into these image lists indicate which image is to be used for
  63     which item. Each image in an image list can contain a mask, and can be made out
  64     of either a bitmap, two bitmaps or an icon. See ImagList.h for more details.
  65
  66     Notifications are passed via the wxWindows 2.0 event system, or using virtual
  67     functions in wxWindows 1.66.
  68
  69     See the sample wxListCtrl app for API usage.
  70
  71     TODO:
  72      - addition of further convenience functions
  73        to avoid use of wxListItem in some functions
  74      - state/overlay images: probably not needed.
  75      - in Win95, you can be called back to supply other information
  76        besides text, such as state information. This saves no memory
  77        and is probably superfluous to requirements.
  78      - testing of whole API, extending current sample.
  79
  80
  81  */
  82
  83 class WXDLLEXPORT wxListCtrl: public wxControl
  84 {
  85 public:
  86     /*
  87      * Public interface
  88      */
  89
  90     wxListCtrl() { Init(); }
  91
  92     wxListCtrl(wxWindow *parent,
  93                wxWindowID id = -1,
  94                const wxPoint& pos = wxDefaultPosition,
  95                const wxSize& size = wxDefaultSize,
  96                long style = wxLC_ICON,
  97                const wxValidator& validator = wxDefaultValidator,
  98                const wxString& name = _T("wxListCtrl"))
  99     {
 100         Init();
 101
 102         Create(parent, id, pos, size, style, validator, name);
 103     }
 104
 105     virtual ~wxListCtrl();
 106
 107     bool Create(wxWindow *parent,
 108                 wxWindowID id = -1,
 109                 const wxPoint& pos = wxDefaultPosition,
 110                 const wxSize& size = wxDefaultSize,
 111                 long style = wxLC_ICON,
 112                 const wxValidator& validator = wxDefaultValidator,
 113                 const wxString& name = _T("wxListCtrl"));
 114
 115
 116     // Attributes
 117     ////////////////////////////////////////////////////////////////////////////
 118
 119     // Set the control colours
 120     bool SetForegroundColour(const wxColour& col);
 121     bool SetBackgroundColour(const wxColour& col);
 122
 123     // Gets information about this column
 124     bool GetColumn(int col, wxListItem& item) const;
 125
 126     // Sets information about this column
 127     bool SetColumn(int col, wxListItem& item) ;
 128
 129     // Gets the column width
 130     int GetColumnWidth(int col) const;
 131
 132     // Sets the column width
 133     bool SetColumnWidth(int col, int width) ;
 134
 135     // Gets the number of items that can fit vertically in the
 136     // visible area of the list control (list or report view)
 137     // or the total number of items in the list control (icon
 138     // or small icon view)
 139     int GetCountPerPage() const;
 140
 141     // return the total area occupied by all the items (icon/small icon only)
 142     wxRect GetViewRect() const;
 143
 144     // Gets the edit control for editing labels.
 145     wxTextCtrl* GetEditControl() const;
 146
 147     // Gets information about the item
 148     bool GetItem(wxListItem& info) const ;
 149
 150     // Sets information about the item
 151     bool SetItem(wxListItem& info) ;
 152
 153     // Sets a string field at a particular column
 154     long SetItem(long index, int col, const wxString& label, int imageId = -1);
 155
 156     // Gets the item state
 157     int  GetItemState(long item, long stateMask) const ;
 158
 159     // Sets the item state
 160     bool SetItemState(long item, long state, long stateMask) ;
 161
 162     // Sets the item image
 163     bool SetItemImage(long item, int image, int selImage) ;
 164
 165     // Gets the item text
 166     wxString GetItemText(long item) const ;
 167
 168     // Sets the item text
 169     void SetItemText(long item, const wxString& str) ;
 170
 171     // Gets the item data
 172     long GetItemData(long item) const ;
 173
 174     // Sets the item data
 175     bool SetItemData(long item, long data) ;
 176
 177     // Gets the item rectangle
 178     bool GetItemRect(long item, wxRect& rect, int code = wxLIST_RECT_BOUNDS) const ;
 179
 180     // Gets the item position
 181     bool GetItemPosition(long item, wxPoint& pos) const ;
 182
 183     // Sets the item position
 184     bool SetItemPosition(long item, const wxPoint& pos) ;
 185
 186     // Gets the number of items in the list control
 187     int GetItemCount() const;
 188
 189     // Gets the number of columns in the list control
 190     int GetColumnCount() const { return m_colCount; }
 191
 192     // get the horizontal and vertical components of the item spacing
 193     wxSize GetItemSpacing() const;
 194
 195     // Foreground colour of an item.
 196     void SetItemTextColour( long item, const wxColour& col);
 197     wxColour GetItemTextColour( long item ) const;
 198
 199     // Background colour of an item.
 200     void SetItemBackgroundColour( long item, const wxColour &col);
 201     wxColour GetItemBackgroundColour( long item ) const;
 202
 203     // Gets the number of selected items in the list control
 204     int GetSelectedItemCount() const;
 205
 206     // Gets the text colour of the listview
 207     wxColour GetTextColour() const;
 208
 209     // Sets the text colour of the listview
 210     void SetTextColour(const wxColour& col);
 211
 212     // Gets the index of the topmost visible item when in
 213     // list or report view
 214     long GetTopItem() const ;
 215
 216     // Add or remove a single window style
 217     void SetSingleStyle(long style, bool add = TRUE) ;
 218
 219     // Set the whole window style
 220     void SetWindowStyleFlag(long style) ;
 221
 222     // Searches for an item, starting from 'item'.
 223     // item can be -1 to find the first item that matches the
 224     // specified flags.
 225     // Returns the item or -1 if unsuccessful.
 226     long GetNextItem(long item, int geometry = wxLIST_NEXT_ALL, int state = wxLIST_STATE_DONTCARE) const ;
 227
 228     // Gets one of the three image lists
 229     wxImageList *GetImageList(int which) const ;
 230
 231     // Sets the image list
 232     // N.B. There's a quirk in the Win95 list view implementation.
 233     // If in wxLC_LIST mode, it'll *still* display images by the labels if
 234     // there's a small-icon image list set for the control - even though you
 235     // haven't specified wxLIST_MASK_IMAGE when inserting.
 236     // So you have to set a NULL small-icon image list to be sure that
 237     // the wxLC_LIST mode works without icons. Of course, you may want icons...
 238     void SetImageList(wxImageList *imageList, int which) ;
 239     void AssignImageList(wxImageList *imageList, int which) ;
 240
 241     // returns true if it is a virtual list control
 242     bool IsVirtual() const { return (GetWindowStyle() & wxLC_VIRTUAL) != 0; }
 243
 244     // refresh items selectively (only useful for virtual list controls)
 245     void RefreshItem(long item);
 246     void RefreshItems(long itemFrom, long itemTo);
 247
 248     // Operations
 249     ////////////////////////////////////////////////////////////////////////////
 250
 251     // Arranges the items
 252     bool Arrange(int flag = wxLIST_ALIGN_DEFAULT);
 253
 254     // Deletes an item
 255     bool DeleteItem(long item);
 256
 257     // Deletes all items
 258     bool DeleteAllItems() ;
 259
 260     // Deletes a column
 261     bool DeleteColumn(int col);
 262
 263     // Deletes all columns
 264     bool DeleteAllColumns();
 265
 266     // Clears items, and columns if there are any.
 267     void ClearAll();
 268
 269     // Edit the label
 270     wxTextCtrl* EditLabel(long item, wxClassInfo* textControlClass = CLASSINFO(wxTextCtrl));
 271
 272     // End label editing, optionally cancelling the edit
 273     bool EndEditLabel(bool cancel);
 274
 275     // Ensures this item is visible
 276     bool EnsureVisible(long item) ;
 277
 278     // Find an item whose label matches this string, starting from the item after 'start'
 279     // or the beginning if 'start' is -1.
 280     long FindItem(long start, const wxString& str, bool partial = FALSE);
 281
 282     // Find an item whose data matches this data, starting from the item after 'start'
 283     // or the beginning if 'start' is -1.
 284     long FindItem(long start, long data);
 285
 286     // Find an item nearest this position in the specified direction, starting from
 287     // the item after 'start' or the beginning if 'start' is -1.
 288     long FindItem(long start, const wxPoint& pt, int direction);
 289
 290     // Determines which item (if any) is at the specified point,
 291     // giving details in 'flags' (see wxLIST_HITTEST_... flags above)
 292     long HitTest(const wxPoint& point, int& flags);
 293
 294     // Inserts an item, returning the index of the new item if successful,
 295     // -1 otherwise.
 296     long InsertItem(wxListItem& info);
 297
 298     // Insert a string item
 299     long InsertItem(long index, const wxString& label);
 300
 301     // Insert an image item
 302     long InsertItem(long index, int imageIndex);
 303
 304     // Insert an image/string item
 305     long InsertItem(long index, const wxString& label, int imageIndex);
 306
 307     // For list view mode (only), inserts a column.
 308     long InsertColumn(long col, wxListItem& info);
 309
 310     long InsertColumn(long col,
 311                       const wxString& heading,
 312                       int format = wxLIST_FORMAT_LEFT,
 313                       int width = -1);
 314
 315     // set the number of items in a virtual list control
 316     void SetItemCount(long count);
 317
 318     // Scrolls the list control. If in icon, small icon or report view mode,
 319     // x specifies the number of pixels to scroll. If in list view mode, x
 320     // specifies the number of columns to scroll.
 321     // If in icon, small icon or list view mode, y specifies the number of pixels
 322     // to scroll. If in report view mode, y specifies the number of lines to scroll.
 323     bool ScrollList(int dx, int dy);
 324
 325     // Sort items.
 326
 327     // fn is a function which takes 3 long arguments: item1, item2, data.
 328     // item1 is the long data associated with a first item (NOT the index).
 329     // item2 is the long data associated with a second item (NOT the index).
 330     // data is the same value as passed to SortItems.
 331     // The return value is a negative number if the first item should precede the second
 332     // item, a positive number of the second item should precede the first,
 333     // or zero if the two items are equivalent.
 334
 335     // data is arbitrary data to be passed to the sort function.
 336     bool SortItems(wxListCtrlCompare fn, long data);
 337
 338     // IMPLEMENTATION
 339     virtual bool MSWCommand(WXUINT param, WXWORD id);
 340     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 341
 342     // bring the control in sync with current m_windowStyle value
 343     void UpdateStyle();
 344
 345     // Implementation: converts wxWindows style to MSW style.
 346     // Can be a single style flag or a bit list.
 347     // oldStyle is 'normalised' so that it doesn't contain
 348     // conflicting styles.
 349     long ConvertToMSWStyle(long& oldStyle, long style) const;
 350
 351     // Event handlers
 352     ////////////////////////////////////////////////////////////////////////////
 353     // Necessary for drawing hrules and vrules, if specified
 354     void OnPaint(wxPaintEvent& event);
 355
 356
 357     // obsolete stuff, for compatibility only -- don't use
 358     wxDEPRECATED( int GetItemSpacing(bool isSmall) const);
 359
 360 protected:
 361     // common part of all ctors
 362     void Init();
 363
 364     // free memory taken by all internal data
 365     void FreeAllInternalData();
 366
 367     wxTextCtrl*       m_textCtrl;        // The control used for editing a label
 368     wxImageList *     m_imageListNormal; // The image list for normal icons
 369     wxImageList *     m_imageListSmall;  // The image list for small icons
 370     wxImageList *     m_imageListState;  // The image list state icons (not implemented yet)
 371     bool              m_ownsImageListNormal,
 372                       m_ownsImageListSmall,
 373                       m_ownsImageListState;
 374
 375     long              m_baseStyle;  // Basic Windows style flags, for recreation purposes
 376     int               m_colCount;   // Windows doesn't have GetColumnCount so must
 377                                     // keep track of inserted/deleted columns
 378     long              m_count;      // Keep track of item count to save calls to
 379                                     // ListView_GetItemCount
 380     bool              m_ignoreChangeMessages;
 381
 382     // TRUE if we have any internal data (user data & attributes)
 383     bool m_AnyInternalData;
 384
 385     // TRUE if we have any items with custom attributes
 386     bool m_hasAnyAttr;
 387
 388     // these functions are only used for virtual list view controls, i.e. the
 389     // ones with wxLC_VIRTUAL style
 390
 391     // return the text for the given column of the given item
 392     virtual wxString OnGetItemText(long item, long column) const;
 393
 394     // return the icon for the given item
 395     virtual int OnGetItemImage(long item) const;
 396
 397     // return the attribute for the item (may return NULL if none)
 398     virtual wxListItemAttr *OnGetItemAttr(long item) const;
 399
 400 private:
 401     bool DoCreateControl(int x, int y, int w, int h);
 402
 403     // process NM_CUSTOMDRAW notification message
 404     WXLPARAM OnCustomDraw(WXLPARAM lParam);
 405
 406     DECLARE_DYNAMIC_CLASS(wxListCtrl)
 407     DECLARE_EVENT_TABLE()
 408     DECLARE_NO_COPY_CLASS(wxListCtrl)
 409 };
 410
 411 #endif // wxUSE_LISTCTRL
 412
 413 #endif // _WX_LISTCTRL_H_
 414