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 wxUSE_LISTCTRL
  16
  17 #include "wx/control.h"
  18 #include "wx/event.h"
  19 #include "wx/hash.h"
  20 #include "wx/textctrl.h"
  21
  22
  23 class WXDLLEXPORT wxImageList;
  24
  25 /*
  26     The wxListCtrl can show lists of items in four different modes:
  27     wxLC_LIST:   multicolumn list view, with optional small icons (icons could be
  28                  optional for some platforms). Columns are computed automatically,
  29                  i.e. you don't set columns as in wxLC_REPORT. In other words,
  30                  the list wraps, unlike a wxListBox.
  31     wxLC_REPORT: single or multicolumn report view (with optional header)
  32     wxLC_ICON:   large icon view, with optional labels
  33     wxLC_SMALL_ICON: small icon view, with optional labels
  34
  35     You can change the style dynamically, either with SetSingleStyle or
  36     SetWindowStyleFlag.
  37
  38     Further window styles:
  39
  40     wxLC_ALIGN_TOP          icons align to the top (default)
  41     wxLC_ALIGN_LEFT         icons align to the left
  42     wxLC_AUTOARRANGE        icons arrange themselves
  43     wxLC_USER_TEXT          the app provides label text on demand, except for column headers
  44     wxLC_EDIT_LABELS        labels are editable: app will be notified.
  45     wxLC_NO_HEADER          no header in report mode
  46     wxLC_NO_SORT_HEADER     can't click on header
  47     wxLC_SINGLE_SEL         single selection
  48     wxLC_SORT_ASCENDING     sort ascending (must still supply a comparison callback in SortItems)
  49     wxLC_SORT_DESCENDING    sort descending (ditto)
  50
  51     Items are referred to by their index (position in the list starting from zero).
  52
  53     Label text is supplied via insertion/setting functions and is stored by the
  54     control, unless the wxLC_USER_TEXT style has been specified, in which case
  55     the app will be notified when text is required (see sample).
  56
  57     Images are dealt with by (optionally) associating 3 image lists with the control.
  58     Zero-based indexes into these image lists indicate which image is to be used for
  59     which item. Each image in an image list can contain a mask, and can be made out
  60     of either a bitmap, two bitmaps or an icon. See ImagList.h for more details.
  61
  62     Notifications are passed via the wxWidgets 2.0 event system, or using virtual
  63     functions in wxWidgets 1.66.
  64
  65     See the sample wxListCtrl app for API usage.
  66
  67     TODO:
  68      - addition of further convenience functions
  69        to avoid use of wxListItem in some functions
  70      - state/overlay images: probably not needed.
  71      - in Win95, you can be called back to supply other information
  72        besides text, such as state information. This saves no memory
  73        and is probably superfluous to requirements.
  74      - testing of whole API, extending current sample.
  75
  76
  77  */
  78
  79 class WXDLLEXPORT wxListCtrl: public wxControl
  80 {
  81 public:
  82     /*
  83      * Public interface
  84      */
  85
  86     wxListCtrl() { Init(); }
  87
  88     wxListCtrl(wxWindow *parent,
  89                wxWindowID id = wxID_ANY,
  90                const wxPoint& pos = wxDefaultPosition,
  91                const wxSize& size = wxDefaultSize,
  92                long style = wxLC_ICON,
  93                const wxValidator& validator = wxDefaultValidator,
  94                const wxString& name = wxListCtrlNameStr)
  95     {
  96         Init();
  97
  98         Create(parent, id, pos, size, style, validator, name);
  99     }
 100
 101     virtual ~wxListCtrl();
 102
 103     bool Create(wxWindow *parent,
 104                 wxWindowID id = wxID_ANY,
 105                 const wxPoint& pos = wxDefaultPosition,
 106                 const wxSize& size = wxDefaultSize,
 107                 long style = wxLC_ICON,
 108                 const wxValidator& validator = wxDefaultValidator,
 109                 const wxString& name = wxListCtrlNameStr);
 110
 111
 112     // Attributes
 113     ////////////////////////////////////////////////////////////////////////////
 114
 115     // Set the control colours
 116     bool SetForegroundColour(const wxColour& col);
 117     bool SetBackgroundColour(const wxColour& col);
 118
 119     // Gets information about this column
 120     bool GetColumn(int col, wxListItem& item) const;
 121
 122     // Sets information about this column
 123     bool SetColumn(int col, const wxListItem& item) ;
 124
 125     // Gets the column width
 126     int GetColumnWidth(int col) const;
 127
 128     // Sets the column width
 129     bool SetColumnWidth(int col, int width) ;
 130
 131     // Gets the number of items that can fit vertically in the
 132     // visible area of the list control (list or report view)
 133     // or the total number of items in the list control (icon
 134     // or small icon view)
 135     int GetCountPerPage() const;
 136
 137     // return the total area occupied by all the items (icon/small icon only)
 138     wxRect GetViewRect() const;
 139
 140     // Gets the edit control for editing labels.
 141     wxTextCtrl* GetEditControl() const;
 142
 143     // Gets information about the item
 144     bool GetItem(wxListItem& info) const ;
 145
 146     // Sets information about the item
 147     bool SetItem(wxListItem& info) ;
 148
 149     // Sets a string field at a particular column
 150     long SetItem(long index, int col, const wxString& label, int imageId = -1);
 151
 152     // Gets the item state
 153     int  GetItemState(long item, long stateMask) const ;
 154
 155     // Sets the item state
 156     bool SetItemState(long item, long state, long stateMask) ;
 157
 158     // Sets the item image
 159     bool SetItemImage(long item, int image, int selImage = -1) ;
 160     bool SetItemColumnImage(long item, long column, int image);
 161
 162     // Gets the item text
 163     wxString GetItemText(long item) const ;
 164
 165     // Sets the item text
 166     void SetItemText(long item, const wxString& str) ;
 167
 168     // Gets the item data
 169     wxUIntPtr GetItemData(long item) const ;
 170
 171     // Sets the item data
 172     bool SetItemData(long item, long data) ;
 173
 174     // Gets the item rectangle
 175     bool GetItemRect(long item, wxRect& rect, int code = wxLIST_RECT_BOUNDS) const ;
 176
 177     // Gets the item position
 178     bool GetItemPosition(long item, wxPoint& pos) const ;
 179
 180     // Sets the item position
 181     bool SetItemPosition(long item, const wxPoint& pos) ;
 182
 183     // Gets the number of items in the list control
 184     int GetItemCount() const;
 185
 186     // Gets the number of columns in the list control
 187     int GetColumnCount() const { return m_colCount; }
 188
 189     // get the horizontal and vertical components of the item spacing
 190     wxSize GetItemSpacing() const;
 191
 192     // Foreground colour of an item.
 193     void SetItemTextColour( long item, const wxColour& col);
 194     wxColour GetItemTextColour( long item ) const;
 195
 196     // Background colour of an item.
 197     void SetItemBackgroundColour( long item, const wxColour &col);
 198     wxColour GetItemBackgroundColour( long item ) const;
 199
 200     // Font of an item.
 201     void SetItemFont( long item, const wxFont &f);
 202     wxFont GetItemFont( long item ) const;
 203
 204     // Gets the number of selected items in the list control
 205     int GetSelectedItemCount() const;
 206
 207     // Gets the text colour of the listview
 208     wxColour GetTextColour() const;
 209
 210     // Sets the text colour of the listview
 211     void SetTextColour(const wxColour& col);
 212
 213     // Gets the index of the topmost visible item when in
 214     // list or report view
 215     long GetTopItem() const ;
 216
 217     // Add or remove a single window style
 218     void SetSingleStyle(long style, bool add = true) ;
 219
 220     // Set the whole window style
 221     void SetWindowStyleFlag(long style) ;
 222
 223     // Searches for an item, starting from 'item'.
 224     // item can be -1 to find the first item that matches the
 225     // specified flags.
 226     // Returns the item or -1 if unsuccessful.
 227     long GetNextItem(long item, int geometry = wxLIST_NEXT_ALL, int state = wxLIST_STATE_DONTCARE) const ;
 228
 229     // Gets one of the three image lists
 230     wxImageList *GetImageList(int which) const ;
 231
 232     // Sets the image list
 233     // N.B. There's a quirk in the Win95 list view implementation.
 234     // If in wxLC_LIST mode, it'll *still* display images by the labels if
 235     // there's a small-icon image list set for the control - even though you
 236     // haven't specified wxLIST_MASK_IMAGE when inserting.
 237     // So you have to set a NULL small-icon image list to be sure that
 238     // the wxLC_LIST mode works without icons. Of course, you may want icons...
 239     void SetImageList(wxImageList *imageList, int which) ;
 240     void AssignImageList(wxImageList *imageList, int which) ;
 241
 242     // are we in report mode?
 243     bool InReportView() const { return HasFlag(wxLC_REPORT); }
 244
 245     // are we in virtual report mode?
 246     bool IsVirtual() const { return HasFlag(wxLC_VIRTUAL); }
 247
 248     // refresh items selectively (only useful for virtual list controls)
 249     void RefreshItem(long item);
 250     void RefreshItems(long itemFrom, long itemTo);
 251
 252     // Operations
 253     ////////////////////////////////////////////////////////////////////////////
 254
 255     // Arranges the items
 256     bool Arrange(int flag = wxLIST_ALIGN_DEFAULT);
 257
 258     // Deletes an item
 259     bool DeleteItem(long item);
 260
 261     // Deletes all items
 262     bool DeleteAllItems() ;
 263
 264     // Deletes a column
 265     bool DeleteColumn(int col);
 266
 267     // Deletes all columns
 268     bool DeleteAllColumns();
 269
 270     // Clears items, and columns if there are any.
 271     void ClearAll();
 272
 273     // Edit the label
 274     wxTextCtrl* EditLabel(long item, wxClassInfo* textControlClass = CLASSINFO(wxTextCtrl));
 275
 276     // End label editing, optionally cancelling the edit
 277     bool EndEditLabel(bool cancel);
 278
 279     // Ensures this item is visible
 280     bool EnsureVisible(long item) ;
 281
 282     // Find an item whose label matches this string, starting from the item after 'start'
 283     // or the beginning if 'start' is -1.
 284     long FindItem(long start, const wxString& str, bool partial = false);
 285
 286     // Find an item whose data matches this data, starting from the item after 'start'
 287     // or the beginning if 'start' is -1.
 288     long FindItem(long start, wxUIntPtr data);
 289
 290     // Find an item nearest this position in the specified direction, starting from
 291     // the item after 'start' or the beginning if 'start' is -1.
 292     long FindItem(long start, const wxPoint& pt, int direction);
 293
 294     // Determines which item (if any) is at the specified point,
 295     // giving details in 'flags' (see wxLIST_HITTEST_... flags above)
 296     long HitTest(const wxPoint& point, int& flags);
 297
 298     // Inserts an item, returning the index of the new item if successful,
 299     // -1 otherwise.
 300     long InsertItem(const wxListItem& info);
 301
 302     // Insert a string item
 303     long InsertItem(long index, const wxString& label);
 304
 305     // Insert an image item
 306     long InsertItem(long index, int imageIndex);
 307
 308     // Insert an image/string item
 309     long InsertItem(long index, const wxString& label, int imageIndex);
 310
 311     // For list view mode (only), inserts a column.
 312     long InsertColumn(long col, const wxListItem& info);
 313
 314     long InsertColumn(long col,
 315                       const wxString& heading,
 316                       int format = wxLIST_FORMAT_LEFT,
 317                       int width = -1);
 318
 319     // set the number of items in a virtual list control
 320     void SetItemCount(long count);
 321
 322     // Scrolls the list control. If in icon, small icon or report view mode,
 323     // x specifies the number of pixels to scroll. If in list view mode, x
 324     // specifies the number of columns to scroll.
 325     // If in icon, small icon or list view mode, y specifies the number of pixels
 326     // to scroll. If in report view mode, y specifies the number of lines to scroll.
 327     bool ScrollList(int dx, int dy);
 328
 329     // Sort items.
 330
 331     // fn is a function which takes 3 long arguments: item1, item2, data.
 332     // item1 is the long data associated with a first item (NOT the index).
 333     // item2 is the long data associated with a second item (NOT the index).
 334     // data is the same value as passed to SortItems.
 335     // The return value is a negative number if the first item should precede the second
 336     // item, a positive number of the second item should precede the first,
 337     // or zero if the two items are equivalent.
 338
 339     // data is arbitrary data to be passed to the sort function.
 340     bool SortItems(wxListCtrlCompare fn, long data);
 341
 342     // IMPLEMENTATION
 343     virtual bool MSWCommand(WXUINT param, WXWORD id);
 344     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 345
 346     // bring the control in sync with current m_windowStyle value
 347     void UpdateStyle();
 348
 349     // Event handlers
 350     ////////////////////////////////////////////////////////////////////////////
 351     // Necessary for drawing hrules and vrules, if specified
 352     void OnPaint(wxPaintEvent& event);
 353
 354
 355     virtual bool ShouldInheritColours() const { return false; }
 356
 357     virtual wxVisualAttributes GetDefaultAttributes() const
 358     {
 359         return GetClassDefaultAttributes(GetWindowVariant());
 360     }
 361
 362     static wxVisualAttributes
 363     GetClassDefaultAttributes(wxWindowVariant variant = wxWINDOW_VARIANT_NORMAL);
 364
 365
 366     // obsolete stuff, for compatibility only -- don't use
 367     wxDEPRECATED( int GetItemSpacing(bool isSmall) const);
 368
 369     // convert our styles to Windows
 370     virtual WXDWORD MSWGetStyle(long style, WXDWORD *exstyle) const;
 371
 372     // special Windows message handling
 373     virtual WXLRESULT MSWWindowProc(WXUINT nMsg,
 374                                     WXWPARAM wParam,
 375                                     WXLPARAM lParam);
 376
 377 protected:
 378     // common part of all ctors
 379     void Init();
 380
 381     // free memory taken by all internal data
 382     void FreeAllInternalData();
 383
 384     // get the item attribute, either by quering it for virtual control, or by
 385     // returning the one previously set using setter methods for a normal one
 386     wxListItemAttr *DoGetItemAttr(long item) const;
 387
 388
 389     wxTextCtrl*       m_textCtrl;        // The control used for editing a label
 390     wxImageList *     m_imageListNormal; // The image list for normal icons
 391     wxImageList *     m_imageListSmall;  // The image list for small icons
 392     wxImageList *     m_imageListState;  // The image list state icons (not implemented yet)
 393     bool              m_ownsImageListNormal,
 394                       m_ownsImageListSmall,
 395                       m_ownsImageListState;
 396
 397     int               m_colCount;   // Windows doesn't have GetColumnCount so must
 398                                     // keep track of inserted/deleted columns
 399     long              m_count;      // Keep track of item count to save calls to
 400                                     // ListView_GetItemCount
 401     bool              m_ignoreChangeMessages;
 402
 403     // true if we have any internal data (user data & attributes)
 404     bool m_AnyInternalData;
 405
 406     // true if we have any items with custom attributes
 407     bool m_hasAnyAttr;
 408
 409     // these functions are only used for virtual list view controls, i.e. the
 410     // ones with wxLC_VIRTUAL style
 411
 412     // return the text for the given column of the given item
 413     virtual wxString OnGetItemText(long item, long column) const;
 414
 415     // return the icon for the given item. In report view, OnGetItemImage will
 416     // only be called for the first column. See OnGetItemColumnImage for
 417     // details.
 418     virtual int OnGetItemImage(long item) const;
 419
 420     // return the icon for the given item and column.
 421     virtual int OnGetItemColumnImage(long item, long column) const;
 422
 423     // return the attribute for the item (may return NULL if none)
 424     virtual wxListItemAttr *OnGetItemAttr(long item) const;
 425
 426 private:
 427     // process NM_CUSTOMDRAW notification message
 428     WXLPARAM OnCustomDraw(WXLPARAM lParam);
 429
 430     DECLARE_DYNAMIC_CLASS(wxListCtrl)
 431     DECLARE_EVENT_TABLE()
 432     DECLARE_NO_COPY_CLASS(wxListCtrl)
 433 };
 434
 435 #endif // wxUSE_LISTCTRL
 436
 437 #endif // _WX_LISTCTRL_H_
 438