treectlg.h

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/////////////////////////////////////////////////////////////////////////////
// Name:        wx/generic/treectlg.h
// Purpose:     wxTreeCtrl class
// Author:      Robert Roebling
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id: treectlg.h,v 1.52 2005/01/30 12:44:46 RR Exp $
// Copyright:   (c) 1997,1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _GENERIC_TREECTRL_H_
#define _GENERIC_TREECTRL_H_

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma interface "treectlg.h"
#endif

#if wxUSE_TREECTRL

#include "wx/scrolwin.h"
#include "wx/pen.h"
#include "wx/imaglist.h"

// -----------------------------------------------------------------------------
// forward declaration
// -----------------------------------------------------------------------------

class WXDLLEXPORT wxGenericTreeItem;

class WXDLLEXPORT wxTreeItemData;

class WXDLLEXPORT wxTreeRenameTimer;
class WXDLLEXPORT wxTreeFindTimer;
class WXDLLEXPORT wxTreeTextCtrl;
class WXDLLEXPORT wxTextCtrl;

// -----------------------------------------------------------------------------
// wxGenericTreeCtrl - the tree control
// -----------------------------------------------------------------------------

class WXDLLEXPORT wxGenericTreeCtrl : public wxScrolledWindow
{
public:
    // creation
    // --------
    wxGenericTreeCtrl() { Init(); }

    wxGenericTreeCtrl(wxWindow *parent, wxWindowID id = wxID_ANY,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
               long style = wxTR_DEFAULT_STYLE,
               const wxValidator &validator = wxDefaultValidator,
               const wxString& name = wxTreeCtrlNameStr)
    {
        Init();
        Create(parent, id, pos, size, style, validator, name);
    }

    virtual ~wxGenericTreeCtrl();

    bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = wxTR_DEFAULT_STYLE,
                const wxValidator &validator = wxDefaultValidator,
                const wxString& name = wxTreeCtrlNameStr);

    // accessors
    // ---------

        // get the total number of items in the control
    size_t GetCount() const;

        // indent is the number of pixels the children are indented relative to
        // the parents position. SetIndent() also redraws the control
        // immediately.
    unsigned int GetIndent() const { return m_indent; }
    void SetIndent(unsigned int indent);

        // spacing is the number of pixels between the start and the Text
    unsigned int GetSpacing() const { return m_spacing; }
    void SetSpacing(unsigned int spacing);

        // image list: these functions allow to associate an image list with
        // the control and retrieve it. Note that when assigned with
        // SetImageList, the control does _not_ delete
        // the associated image list when it's deleted in order to allow image
        // lists to be shared between different controls. If you use
        // AssignImageList, the control _does_ delete the image list.
        //
        // The normal image list is for the icons which correspond to the
        // normal tree item state (whether it is selected or not).
        // Additionally, the application might choose to show a state icon
        // which corresponds to an app-defined item state (for example,
        // checked/unchecked) which are taken from the state image list.
    virtual wxImageList *GetImageList() const;
    virtual wxImageList *GetStateImageList() const;
    virtual wxImageList *GetButtonsImageList() const;

    virtual void SetImageList(wxImageList *imageList);
    virtual void SetStateImageList(wxImageList *imageList);
    virtual void SetButtonsImageList(wxImageList *imageList);
    virtual void AssignImageList(wxImageList *imageList);
    virtual void AssignStateImageList(wxImageList *imageList);
    virtual void AssignButtonsImageList(wxImageList *imageList);

    virtual void SetDropEffectAboveItem( bool above = false ) { m_dropEffectAboveItem = above; }
    virtual bool GetDropEffectAboveItem() const { return m_dropEffectAboveItem; }

    // Functions to work with tree ctrl items.

    // accessors
    // ---------

        // retrieve item's label
    wxString GetItemText(const wxTreeItemId& item) const;
        // get one of the images associated with the item (normal by default)
    virtual int GetItemImage(const wxTreeItemId& item,
                     wxTreeItemIcon which = wxTreeItemIcon_Normal) const;
        // get the data associated with the item
    wxTreeItemData *GetItemData(const wxTreeItemId& item) const;

        // get the item's text colour
    wxColour GetItemTextColour(const wxTreeItemId& item) const;

        // get the item's background colour
    wxColour GetItemBackgroundColour(const wxTreeItemId& item) const;

        // get the item's font
    wxFont GetItemFont(const wxTreeItemId& item) const;

    // modifiers
    // ---------

        // set item's label
    void SetItemText(const wxTreeItemId& item, const wxString& text);
        // get one of the images associated with the item (normal by default)
    virtual void SetItemImage(const wxTreeItemId& item, int image,
                      wxTreeItemIcon which = wxTreeItemIcon_Normal);
        // associate some data with the item
    void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);

        // force appearance of [+] button near the item. This is useful to
        // allow the user to expand the items which don't have any children now
        // - but instead add them only when needed, thus minimizing memory
        // usage and loading time.
    void SetItemHasChildren(const wxTreeItemId& item, bool has = true);

        // the item will be shown in bold
    void SetItemBold(const wxTreeItemId& item, bool bold = true);

        // the item will be shown with a drop highlight
    void SetItemDropHighlight(const wxTreeItemId& item, bool highlight = true);

        // set the item's text colour
    void SetItemTextColour(const wxTreeItemId& item, const wxColour& col);

        // set the item's background colour
    void SetItemBackgroundColour(const wxTreeItemId& item, const wxColour& col);

        // set the item's font (should be of the same height for all items)
    void SetItemFont(const wxTreeItemId& item, const wxFont& font);

        // set the window font
    virtual bool SetFont( const wxFont &font );

       // set the styles.  No need to specify a GetWindowStyle here since
       // the base wxWindow member function will do it for us
    void SetWindowStyle(const long styles);

    // item status inquiries
    // ---------------------

        // is the item visible (it might be outside the view or not expanded)?
    bool IsVisible(const wxTreeItemId& item) const;
        // does the item has any children?
    bool HasChildren(const wxTreeItemId& item) const
      { return ItemHasChildren(item); }
    bool ItemHasChildren(const wxTreeItemId& item) const;
        // is the item expanded (only makes sense if HasChildren())?
    bool IsExpanded(const wxTreeItemId& item) const;
        // is this item currently selected (the same as has focus)?
    bool IsSelected(const wxTreeItemId& item) const;
        // is item text in bold font?
    bool IsBold(const wxTreeItemId& item) const;
        // does the layout include space for a button?

    // number of children
    // ------------------

        // if 'recursively' is false, only immediate children count, otherwise
        // the returned number is the number of all items in this branch
    size_t GetChildrenCount(const wxTreeItemId& item,
                            bool recursively = true) const;

    // navigation
    // ----------

    // wxTreeItemId.IsOk() will return false if there is no such item

        // get the root tree item
    wxTreeItemId GetRootItem() const { return m_anchor; }

        // get the item currently selected (may return NULL if no selection)
    wxTreeItemId GetSelection() const { return m_current; }

        // get the items currently selected, return the number of such item
    size_t GetSelections(wxArrayTreeItemIds&) const;

        // get the parent of this item (may return NULL if root)
    wxTreeItemId GetItemParent(const wxTreeItemId& item) const;

#if WXWIN_COMPATIBILITY_2_2
        // deprecated:  Use GetItemParent instead.
    wxDEPRECATED( wxTreeItemId GetParent(const wxTreeItemId& item) const);

        // Expose the base class method hidden by the one above. Not deprecatable.
    wxWindow *GetParent() const { return wxScrolledWindow::GetParent(); }
#endif  // WXWIN_COMPATIBILITY_2_2

        // for this enumeration function you must pass in a "cookie" parameter
        // which is opaque for the application but is necessary for the library
        // to make these functions reentrant (i.e. allow more than one
        // enumeration on one and the same object simultaneously). Of course,
        // the "cookie" passed to GetFirstChild() and GetNextChild() should be
        // the same!

        // get the first child of this item
    wxTreeItemId GetFirstChild(const wxTreeItemId& item,
                               wxTreeItemIdValue& cookie) const;
        // get the next child
    wxTreeItemId GetNextChild(const wxTreeItemId& item,
                              wxTreeItemIdValue& cookie) const;
        // get the last child of this item - this method doesn't use cookies
    wxTreeItemId GetLastChild(const wxTreeItemId& item) const;

        // get the next sibling of this item
    wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
        // get the previous sibling
    wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;

        // get first visible item
    wxTreeItemId GetFirstVisibleItem() const;
        // get the next visible item: item must be visible itself!
        // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
    wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
        // get the previous visible item: item must be visible itself!
    wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;

        // Only for internal use right now, but should probably be public
    wxTreeItemId GetNext(const wxTreeItemId& item) const;

    // operations
    // ----------

        // add the root node to the tree
    virtual wxTreeItemId AddRoot(const wxString& text,
                         int image = -1, int selectedImage = -1,
                         wxTreeItemData *data = NULL);

        // insert a new item in as the first child of the parent
    virtual wxTreeItemId PrependItem(const wxTreeItemId& parent,
                             const wxString& text,
                             int image = -1, int selectedImage = -1,
                             wxTreeItemData *data = NULL);

        // insert a new item after a given one
    virtual wxTreeItemId InsertItem(const wxTreeItemId& parent,
                            const wxTreeItemId& idPrevious,
                            const wxString& text,
                            int image = -1, int selectedImage = -1,
                            wxTreeItemData *data = NULL);