scrolling of foreign windowsplus sample

[wxWidgets.git] / include / wx / os2 / listctrl.h

/////////////////////////////////////////////////////////////////////////////
// Name:        listctrl.h
// Purpose:     wxListCtrl class
// Author:      David Webster
// Modified by:
// Created:     10/10/99
// RCS-ID:      $Id$
// Copyright:   (c) David Webster
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_LISTCTRL_H_
#define _WX_LISTCTRL_H_

#include "wx/control.h"
#include "wx/event.h"
#include "wx/imaglist.h"

/*
    The wxListCtrl can show lists of items in four different modes:
    wxLC_LIST:   multicolumn list view, with optional small icons (icons could be
                 optional for some platforms). Columns are computed automatically,
                 i.e. you don't set columns as in wxLC_REPORT. In other words,
                 the list wraps, unlike a wxListBox.
    wxLC_REPORT: single or multicolumn report view (with optional header)
    wxLC_ICON:   large icon view, with optional labels
    wxLC_SMALL_ICON: small icon view, with optional labels

    You can change the style dynamically, either with SetSingleStyle or
    SetWindowStyleFlag.

    Further window styles:

    wxLC_ALIGN_TOP          icons align to the top (default)
    wxLC_ALIGN_LEFT         icons align to the left
    wxLC_AUTOARRANGE        icons arrange themselves
    wxLC_USER_TEXT          the app provides label text on demand, except for column headers
    wxLC_EDIT_LABELS        labels are editable: app will be notified.
    wxLC_NO_HEADER          no header in report mode
    wxLC_NO_SORT_HEADER     can't click on header
    wxLC_SINGLE_SEL         single selection
    wxLC_SORT_ASCENDING     sort ascending (must still supply a comparison callback in SortItems)
    wxLC_SORT_DESCENDING    sort descending (ditto)

    Items are referred to by their index (position in the list starting from zero).

    Label text is supplied via insertion/setting functions and is stored by the
    control, unless the wxLC_USER_TEXT style has been specified, in which case
    the app will be notified when text is required (see sample).

    Images are dealt with by (optionally) associating 3 image lists with the control.
    Zero-based indexes into these image lists indicate which image is to be used for
    which item. Each image in an image list can contain a mask, and can be made out
    of either a bitmap, two bitmaps or an icon. See ImagList.h for more details.

    Notifications are passed via the wxWindows 2.0 event system.

    See the sample wxListCtrl app for API usage.

 */

// Mask flags to tell app/GUI what fields of wxListItem are valid
#define wxLIST_MASK_STATE           0x0001
#define wxLIST_MASK_TEXT            0x0002
#define wxLIST_MASK_IMAGE           0x0004
#define wxLIST_MASK_DATA            0x0008
#define wxLIST_SET_ITEM             0x0010
#define wxLIST_MASK_WIDTH           0x0020
#define wxLIST_MASK_FORMAT          0x0040

// State flags for indicating the state of an item
#define wxLIST_STATE_DONTCARE       0x0000
#define wxLIST_STATE_DROPHILITED    0x0001
#define wxLIST_STATE_FOCUSED        0x0002
#define wxLIST_STATE_SELECTED       0x0004
#define wxLIST_STATE_CUT            0x0008

// Hit test flags, used in HitTest
#define wxLIST_HITTEST_ABOVE            0x0001  // Above the client area.
#define wxLIST_HITTEST_BELOW            0x0002  // Below the client area.
#define wxLIST_HITTEST_NOWHERE          0x0004  // In the client area but below the last item.
#define wxLIST_HITTEST_ONITEMICON       0x0020  // On the bitmap associated with an item.
#define wxLIST_HITTEST_ONITEMLABEL      0x0080  // On the label (string) associated with an item.
#define wxLIST_HITTEST_ONITEMRIGHT      0x0100  // In the area to the right of an item.
#define wxLIST_HITTEST_ONITEMSTATEICON  0x0200  // On the state icon for a tree view item that is in a user-defined state.
#define wxLIST_HITTEST_TOLEFT           0x0400  // To the left of the client area.
#define wxLIST_HITTEST_TORIGHT          0x0800  // To the right of the client area.

#define wxLIST_HITTEST_ONITEM (wxLIST_HITTEST_ONITEMICON | wxLIST_HITTEST_ONITEMLABEL wxLIST_HITTEST_ONITEMSTATEICON)

// Flags for GetNextItem
enum {
    wxLIST_NEXT_ABOVE,          // Searches for an item above the specified item
    wxLIST_NEXT_ALL,            // Searches for subsequent item by index
    wxLIST_NEXT_BELOW,          // Searches for an item below the specified item
    wxLIST_NEXT_LEFT,           // Searches for an item to the left of the specified item
    wxLIST_NEXT_RIGHT           // Searches for an item to the right of the specified item
};

// Alignment flags for Arrange
enum {
    wxLIST_ALIGN_DEFAULT,
    wxLIST_ALIGN_LEFT,
    wxLIST_ALIGN_TOP,
    wxLIST_ALIGN_SNAP_TO_GRID
};

// Column format
enum {
    wxLIST_FORMAT_LEFT,
    wxLIST_FORMAT_RIGHT,
    wxLIST_FORMAT_CENTRE,
    wxLIST_FORMAT_CENTER = wxLIST_FORMAT_CENTRE
};

// Autosize values for SetColumnWidth
enum {
    wxLIST_AUTOSIZE = -1,
    wxLIST_AUTOSIZE_USEHEADER = -2
};

// Flag values for GetItemRect
enum {
    wxLIST_RECT_BOUNDS,
    wxLIST_RECT_ICON,
    wxLIST_RECT_LABEL
};

// Flag values for FindItem
enum {
    wxLIST_FIND_UP,
    wxLIST_FIND_DOWN,
    wxLIST_FIND_LEFT,
    wxLIST_FIND_RIGHT
};

// wxListItem: data representing an item, or report field.
// It also doubles up to represent entire column information
// when inserting or setting a column.
class WXDLLEXPORT wxListItem: public wxObject
{
 DECLARE_DYNAMIC_CLASS(wxListItem)
public:
    long            m_mask;     // Indicates what fields are valid
    long            m_itemId;   // The zero-based item position
    int             m_col;      // Zero-based column, if in report mode
    long            m_state;    // The state of the item
    long            m_stateMask; // Which flags of m_state are valid (uses same flags)
    wxString        m_text;     // The label/header text
    int             m_image;    // The zero-based index into an image list
    long            m_data;     // App-defined data

    // For columns only
    int             m_format;   // left, right, centre
    int             m_width;    // width of column

    wxListItem();
};

// type of compare function for wxListCtrl sort operation
typedef int (*wxListCtrlCompare)(long item1, long item2, long sortData);

class WXDLLEXPORT wxListCtrl: public wxControl
{
  DECLARE_DYNAMIC_CLASS(wxListCtrl)
 public:
  /*
   * Public interface
   */

  wxListCtrl();

  inline wxListCtrl(wxWindow *parent, wxWindowID id = -1, const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize,
            long style = wxLC_ICON, const wxValidator& validator = wxDefaultValidator,
            const wxString& name = "listCtrl")
  {
    Create(parent, id, pos, size, style, validator, name);
  }
  ~wxListCtrl();

  bool Create(wxWindow *parent, wxWindowID id = -1, const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize,
            long style = wxLC_ICON, const wxValidator& validator = wxDefaultValidator, const wxString& name = "wxListCtrl");


  // Attributes
  ////////////////////////////////////////////////////////////////////////////

  // Sets the background colour (GetBackgroundColour already implicit in
  // wxWindow class)
  bool SetBackgroundColour(const wxColour& col);

  // Gets information about this column
  bool GetColumn(int col, wxListItem& item) const;

  // Sets information about this column
  bool SetColumn(int col, wxListItem& item) ;

  // Gets the column width
  int GetColumnWidth(int col) const;

  // Sets the column width
  bool SetColumnWidth(int col, int width) ;

  // Gets the number of items that can fit vertically in the
  // visible area of the list control (list or report view)
  // or the total number of items in the list control (icon
  // or small icon view)
  int GetCountPerPage() const;

  // Gets the edit control for editing labels.
  wxTextCtrl* GetEditControl() const;

  // Gets information about the item
  bool GetItem(wxListItem& info) const ;

  // Sets information about the item
  bool SetItem(wxListItem& info) ;

  // Sets a string field at a particular column
  long SetItem(long index, int col, const wxString& label, int imageId = -1);

  // Gets the item state
  int  GetItemState(long item, long stateMask) const ;

  // Sets the item state
  bool SetItemState(long item, long state, long stateMask) ;

  // Sets the item image
  bool SetItemImage(long item, int image, int selImage) ;

  // Gets the item text
  wxString GetItemText(long item) const ;

  // Sets the item text
  void SetItemText(long item, const wxString& str) ;

  // Gets the item data
  long GetItemData(long item) const ;

  // Sets the item data
  bool SetItemData(long item, long data) ;

  // Gets the item rectangle
  bool GetItemRect(long item, wxRect& rect, int code = wxLIST_RECT_BOUNDS) const ;

  // Gets the item position
  bool GetItemPosition(long item, wxPoint& pos) const ;

  // Sets the item position
  bool SetItemPosition(long item, const wxPoint& pos) ;

  // Gets the number of items in the list control
  int GetItemCount() const;

  // Gets the number of columns in the list control
  int GetColumnCount() const;

  // Retrieves the spacing between icons in pixels.
  // If small is TRUE, gets the spacing for the small icon
  // view, otherwise the large icon view.
  int GetItemSpacing(bool isSmall) const;

  // Gets the number of selected items in the list control
  int GetSelectedItemCount() const;

  // Gets the text colour of the listview
  wxColour GetTextColour() const;

  // Sets the text colour of the listview
  void SetTextColour(const wxColour& col);

  // Gets the index of the topmost visible item when in
  // list or report view
  long GetTopItem() const ;

  // Add or remove a single window style
  void SetSingleStyle(long style, bool add = TRUE) ;

  // Set the whole window style
  void SetWindowStyleFlag(long style) ;

  // Searches for an item, starting from 'item'.
  // item can be -1 to find the first item that matches the
  // specified flags.
  // Returns the item or -1 if unsuccessful.
  long GetNextItem(long item, int geometry = wxLIST_NEXT_ALL, int state = wxLIST_STATE_DONTCARE) const ;

  // Implementation: converts wxWindows style to OS2 style.
  // Can be a single style flag or a bit list.
  // oldStyle is 'normalised' so that it doesn't contain
  // conflicting styles.
  long ConvertToOS2Style(long& oldStyle, long style) const;

  // Gets one of the three image lists
  wxImageList *GetImageList(int which) const ;

  // Sets the image list
  // N.B. There's a quirk in the Win95 list view implementation.
  // If in wxLC_LIST mode, it'll *still* display images by the labels if
  // there's a small-icon image list set for the control - even though you
  // haven't specified wxLIST_MASK_IMAGE when inserting.
  // So you have to set a NULL small-icon image list to be sure that
  // the wxLC_LIST mode works without icons. Of course, you may want icons...
  void SetImageList(wxImageList *imageList, int which) ;

  // Operations
  ////////////////////////////////////////////////////////////////////////////

  // Arranges the items
  bool Arrange(int flag = wxLIST_ALIGN_DEFAULT);

  // Deletes an item
  bool DeleteItem(long item);

  // Deletes all items
  bool DeleteAllItems() ;

  // Deletes a column
  bool DeleteColumn(int col);

  // Deletes all columns
  bool DeleteAllColumns();

  // Clears items, and columns if there are any.
  void ClearAll();

  // Edit the label
  wxTextCtrl* EditLabel(long item, wxClassInfo* textControlClass = CLASSINFO(wxTextCtrl));

  // End label editing, optionally cancelling the edit
  bool EndEditLabel(bool cancel);

  // Ensures this item is visible
  bool EnsureVisible(long item) ;

  // Find an item whose label matches this string, starting from the item after 'start'
  // or the beginning if 'start' is -1.
  long FindItem(long start, const wxString& str, bool partial = FALSE);

  // Find an item whose data matches this data, starting from the item after 'start'
  // or the beginning if 'start' is -1.
  long FindItem(long start, long data);

  // Find an item nearest this position in the specified direction, starting from
  // the item after 'start' or the beginning if 'start' is -1.
  long FindItem(long start, const wxPoint& pt, int direction);

  // Determines which item (if any) is at the specified point,
  // giving details in 'flags' (see wxLIST_HITTEST_... flags above)
  long HitTest(const wxPoint& point, int& flags);

  // Inserts an item, returning the index of the new item if successful,
  // -1 otherwise.
  // TOD: Should also have some further convenience functions
  // which don't require setting a wxListItem object
  long InsertItem(wxListItem& info);

  // Insert a string item
  long InsertItem(long index, const wxString& label);

  // Insert an image item
  long InsertItem(long index, int imageIndex);

  // Insert an image/string item
  long InsertItem(long index, const wxString& label, int imageIndex);

  // For list view mode (only), inserts a column.
  long InsertColumn(long col, wxListItem& info);

  long InsertColumn(long col, const wxString& heading, int format = wxLIST_FORMAT_LEFT,
    int width = -1);

  // Scrolls the list control. If in icon, small icon or report view mode,
  // x specifies the number of pixels to scroll. If in list view mode, x
  // specifies the number of columns to scroll.
  // If in icon, small icon or list view mode, y specifies the number of pixels
  // to scroll. If in report view mode, y specifies the number of lines to scroll.
  bool ScrollList(int dx, int dy);

  // Sort items.

  // fn is a function which takes 3 long arguments: item1, item2, data.
  // item1 is the long data associated with a first item (NOT the index).
  // item2 is the long data associated with a second item (NOT the index).
  // data is the same value as passed to SortItems.
  // The return value is a negative number if the first item should precede the second
  // item, a positive number of the second item should precede the first,
  // or zero if the two items are equivalent.

  // data is arbitrary data to be passed to the sort function.
  bool SortItems(wxListCtrlCompare fn, long data);

  // IMPLEMENTATION
  virtual bool OS2Command(WXUINT param, WXWORD id);
  virtual bool OS2OnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);

  // bring the control in sync with current m_windowStyle value
  void UpdateStyle();

  // Add to pool: necessary because Windows needs to have a string
  // still exist across 3 callbacks.
  wxChar *AddPool(const wxString& str);

protected:
  wxTextCtrl*       m_textCtrl;        // The control used for editing a label
  wxImageList *     m_imageListNormal; // The image list for normal icons
  wxImageList *     m_imageListSmall;  // The image list for small icons
  wxImageList *     m_imageListState;  // The image list state icons (not implemented yet)

  long              m_baseStyle;  // Basic Windows style flags, for recreation purposes
  wxStringList      m_stringPool; // Pool of 3 strings to satisfy Windows callback
                                  // requirements
  int               m_colCount;   // Windows doesn't have GetColumnCount so must
                                  // keep track of inserted/deleted columns

private:
  bool DoCreateControl(int x, int y, int w, int h);
};

#endif
    // _WX_LISTCTRL_H_