339 lines
12 KiB
C
339 lines
12 KiB
C
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/***************************************************************************/
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/** Microsoft Windows **/
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/** Copyright(c) Microsoft Corp., 1993 **/
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/***************************************************************************/
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/****************************************************************************
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ICONLBOX.H
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Header file for IconListBox class (hard tabs at 4)
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May 93, JimH (combobox support added by VladS)
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IconListBox is constructed by specifying the application's hInst and
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the ID of the listbox control. All the properties of the listbox (font,
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single or muliple selection, etc.) are defined in the .RC file. It must
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include the LBS_OWNERDRAWFIXED style.
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Icons are really bitmaps or parts of bitmaps. They must all be the same
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size. If they are not 16 by 16 this size must be specified in the
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constructor. By default, bright green (RGB(0,255,0)) is the transparent
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color but this can be overridden for each individual icon.
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Construction of the IconListBox object should occur when the dialog is
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created. You cannot wait until WM_INITDIALOG time because you need to
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handle the WM_MEASUREITEM message which comes first by passing to the
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constructed IconListBox. Similarly, the IconListBox cannot be destructed
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during OK or Cancel handling because you will have to handle subsequent
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WM_DRAWITEM messages.
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Follow these steps to use IconListBox (assumes 16 by 16 icons)
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1. Construct IconListBox(hInst, IDC_MYLISTBOX);
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2. Handle WM_MEASUREITEM by calling
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mylistbox->SetHeight(hwndDlg, (MEASUREITESTRUCT FAR *)lParam);
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You MUST do this step even if you are using the default height of 16
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pixels.
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3. During WM_INITDIALOG processing, register each possible icon by
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specifying your internal identifier for this icon, a bitmap id, and
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if necessary, the x and y offset in the bitmap of this icon.
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Don't load the bitmap yourself. Just pass the .RC file id.
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mylistbox->RegisterIcon(typeFission, IDB_MushroomCloud);
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Note that you can register several icons from the same .RC file
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bitmap. These may or may not have different x and y offsets but
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they must all have the same transparent color. There is no
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extra overhead associated with reusing bitmaps or parts of bitmaps.
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4 Also during WM_INITDIALOG, add the listbox entries.
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mylistbox->AddString(typeColdFusion, "Pons & Fleishman");
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5. Handle the WM_DRAWITEM message by calling
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if (wParam == IDC_MYLISTBOX)
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mylistbox->DrawItem((DRAWITEMSTRUCT FAR *)lParam);
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6. When handling OK, do whatever listbox stuff you have to do.
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n = mylistbox->GetCurrentSelection();
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mylistbox->GetString(n, pbuffer);
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7. Destruct IconListBox
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Inline wrappers for common listbox functions are at the end of this file.
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****************************************************************************/
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#ifndef _ICONLBOX_H_
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#define _ICONLBOX_H_
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struct IconList {
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int nID; // ID icon was registered with
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int nResID; // .RC file resource ID
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int x, y; // offset within specified icon
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HBITMAP hbmSelected;
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HBITMAP hbmUnselected;
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};
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const int MAXICONS = 10; // max number that can be registered
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const int MAXTABS = 10; // max number of tabs in string
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const int MAXSTRINGLEN = MAX_PATH; // AddString and InsertString limit
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const int ICONSPACE = 3; // whitespace around Icons in listbox
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class IconListBox {
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public:
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IconListBox(HINSTANCE hInst, int nID,
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int iconWidth = 16, int iconHeight = 16);
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~IconListBox();
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int AddString(int nIcon, const char far *string);
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void Clear();
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void DeleteString(int nIndex);
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virtual void DrawItem(LPDRAWITEMSTRUCT lpd);
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int FindString(const char far *string, int nIndexStart = -1) const;
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int FindStringExact(const char far *string, int nIndexStart = -1) const;
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int GetCount();
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int GetCurrentSelection(void) const;
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int GetIconID(int nIndex) const;
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BOOL GetSel(int nIndex);
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int GetSelCount() const;
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int GetSelItems(int cItems, int FAR *lpItems) const;
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int GetString(int nIndex, char far *string) const;
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int InsertString(int nIcon, const char far *string, int nIndex);
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void RegisterIcon(int nIconID, int nResID, int x=0, int y=0,
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COLORREF colTransparent = RGB(0, 255, 0));
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int SelectString(int nIndex, const char far *string);
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int SetCurrentSelection(int nIndex = -1) const;
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void SetHeight(HWND hwndDlg, LPMEASUREITEMSTRUCT lpm, int height=16);
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void SetRedraw(BOOL bRedraw = TRUE) const;
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void SetSel(int nIndex, BOOL bSelected = TRUE) const;
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void SetTabStops(int cTabs, const int *pTabs);
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protected:
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int SetItemData(int nIndex, int nIconID) const;
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int UpdateHorizontalExtent(int nIconID,const char *string);
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int _cIcons; // number of icons registered
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IconList _aIcons[MAXICONS]; // registered icons
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int _cTabs; // number of tabs registered
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int _aTabs[MAXTABS]; // registered tabs
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int _iconWidth, _iconHeight; // size of icons
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int _iCurrentMaxHorzExt; // Currently maximum horizontal extent
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COLORREF _colSel, _colSelText, _colUnsel, _colUnselText;
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HINSTANCE _hInst; // application's hInst
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int _nCtlID; // id of listbox control
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int _nTextOffset; // vertical DrawText offset
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BOOL _fCombo; // Dropdown combo box ?
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HWND _hwndDialog;
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HWND _hwndListBox;
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HBRUSH _hbrSelected; // background colours
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HBRUSH _hbrUnselected;
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};
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// AddString - returns index of new string, or LB_ERR or LB_ERRSPACE
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inline int IconListBox::AddString(int nIcon, const char far *string)
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{
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int nIndex = (int) ::SendDlgItemMessage(_hwndDialog, _nCtlID,
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_fCombo ? CB_ADDSTRING : LB_ADDSTRING,
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0, (LPARAM) ((LPSTR) string));
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SetItemData(nIndex, nIcon);
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UpdateHorizontalExtent(nIcon,string);
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return nIndex;
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}
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// Clear - clears contents of listbox
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inline void IconListBox::Clear()
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{
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::SendMessage(_hwndListBox,
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_fCombo ? CB_RESETCONTENT : LB_RESETCONTENT, 0, 0);
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_iCurrentMaxHorzExt = 0;
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}
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// DeleteString - removes a string specified by the index
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inline void IconListBox::DeleteString(int nIndex)
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{
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::SendMessage(_hwndListBox,
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_fCombo ? CB_DELETESTRING : LB_DELETESTRING, nIndex, 0);
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// May be horizontal extent changed - recalculate again
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UpdateHorizontalExtent(0,NULL);
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}
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// FindString & FindStringExact
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//
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// These functions find a listbox entry that begins with the characters
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// specifed in string (FindString) or exactly matches string (FindStringExact)
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// They return LB_ERR if the string is not found. Otherwise, you can call
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// GetString on the returned index.
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//
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// nIndexStart defaults to -1 which means search from the beginning of the
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// listbox or combobox.
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inline int IconListBox::FindString(const char far *string, int nIndexStart) const
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{
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return (int) ::SendDlgItemMessage(_hwndDialog, _nCtlID,
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_fCombo ? CB_FINDSTRING : LB_FINDSTRING, nIndexStart, (LPARAM)string);
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}
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inline int IconListBox::FindStringExact(const char far *string, int nIndexStart) const
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{
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return (int) ::SendDlgItemMessage(_hwndDialog, _nCtlID,
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_fCombo ? CB_FINDSTRINGEXACT : LB_FINDSTRINGEXACT,
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nIndexStart, (LPARAM)string);
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}
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// GetCount - returns the current number of listbox entries
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inline int IconListBox::GetCount()
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_GETCOUNT : LB_GETCOUNT, 0, 0);
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}
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// GetCurrentSelection - returns index or LB_ERR if no selection.
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// This function is not useful for multi-select listboxen.
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inline int IconListBox::GetCurrentSelection() const
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_GETCURSEL : LB_GETCURSEL, 0, 0);
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}
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// GetItemData - retrieve ICON id
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inline int IconListBox::GetIconID(int nIndex) const
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_GETITEMDATA : LB_GETITEMDATA, nIndex, 0);
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}
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// GetSel - returns nonzero if nIndex is selected
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inline BOOL IconListBox::GetSel(int nIndex)
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{
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return (BOOL) ::SendMessage(_hwndListBox, LB_GETSEL, nIndex, 0);
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}
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// GetSelCount - returns number of selected entries in multi-select listbox
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inline int IconListBox::GetSelCount() const
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{
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return (int) ::SendMessage(_hwndListBox, LB_GETSELCOUNT, 0, 0);
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}
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// GetSelItems - places index of each selected item in array. Returns
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// LB_ERR if not multi-select listbox, otherwise number of items in array.
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inline int IconListBox::GetSelItems(int cItems, int FAR *lpItems) const
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{
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return (int)
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::SendMessage(_hwndListBox, LB_GETSELITEMS, cItems, (LPARAM) lpItems);
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}
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// GetString - returns length of string returned or LB_ERR if nIndex invalid
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inline int IconListBox::GetString(int nIndex, char far *string) const
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{
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return (int) ::SendDlgItemMessage(_hwndDialog, _nCtlID,
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_fCombo ? CB_GETLBTEXT : LB_GETTEXT, nIndex,
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(LPARAM) ((LPSTR) string));
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}
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// InsertString - same returns as AddString
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inline int IconListBox::InsertString(int nIcon, const char far *string, int nIndex)
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{
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int nNewIndex = (int) ::SendDlgItemMessage(_hwndDialog, _nCtlID,
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_fCombo ? CB_INSERTSTRING : LB_INSERTSTRING,
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(WPARAM) nIndex, (LPARAM) ((LPSTR) string));
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SetItemData(nNewIndex, nIcon);
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UpdateHorizontalExtent(nIcon,string);
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return(nNewIndex);
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}
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// SelectString
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// nIndex specifies where to start searching (-1 means from top).
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// string specifies the initial characters of the string to match.
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// Function returns index or LB_ERR if string not found
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inline int IconListBox::SelectString(int nIndex, const char far *string)
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_SELECTSTRING : LB_SELECTSTRING,
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nIndex,(LRESULT)string);
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}
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// SetCurrentSelection -
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// This function sets the current selection in a single-select style
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// listbox. It returns LB_ERR if an error occurs, or if nIndex is -1
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// (the default) meaning no current selection.
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inline int IconListBox::SetCurrentSelection(int nIndex) const
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_SETCURSEL : LB_SETCURSEL, nIndex, 0);
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}
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// SetItemData - used to store icon id, returns LB_ERR if error occurs
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// Use GetIconID to retrieve this id later.
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inline int IconListBox::SetItemData(int nIndex, int nData) const
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{
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return (int) ::SendMessage(_hwndListBox,
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_fCombo ? CB_SETITEMDATA : LB_SETITEMDATA,
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nIndex, nData);
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}
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// SetRedraw - turn on (TRUE) or off (FALSE) visual updates
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inline void IconListBox::SetRedraw(BOOL bRedraw) const
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{
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::SendMessage(_hwndListBox, WM_SETREDRAW, bRedraw, 0);
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}
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// SetSel - used in multiselect listboxen. TRUE selects, FALSE deselects.
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// bSelected defaults to TRUE. nIndex == -1 means select all.
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inline void IconListBox::SetSel(int nIndex, BOOL bSelected) const
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{
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::SendMessage(_hwndListBox, LB_SETSEL, bSelected, nIndex);
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}
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#endif // _ICONLBOX_H_
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