283 lines
9.5 KiB
C
283 lines
9.5 KiB
C
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/* @doc INTERNAL
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*
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* @module _CBHOST.H Combobox Host for Window's Rich Edit Control |
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*
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*
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* Original Author: <nl>
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* Jerry Kim
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*
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* History: <nl>
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* 01/30/98 v-jerrki created
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*/
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#ifndef _CBHOST_H
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#define _CBHOST_H
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#ifndef NOWINDOWHOSTS
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#include "_host.h"
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#define CB_LISTBOXID 1000
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#define CB_EDITBOXID 1001
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enum ITEMMSG {
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ITEM_MSG_DRAWLIST = 1,
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ITEM_MSG_DRAWCOMBO,
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ITEM_MSG_DELETE,
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ITEM_MSG_MEASUREITEM,
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};
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extern "C" LRESULT CALLBACK RichComboBoxWndProc(HWND, UINT, WPARAM, LPARAM);
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class CCmbBxWinHost : public CTxtWinHost
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{
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friend LRESULT CALLBACK RichComboBoxWndProc(HWND, UINT, WPARAM, LPARAM);
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public:
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typedef enum { // enumeration determining type of combo box
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kSimple = 1,
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kDropDown = 2,
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kDropDownList = 3
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} Combotype;
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#ifndef NOACCESSIBILITY
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//////////////////////// Combobox IAccessible Methods //////////////////////////////
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// COMBOBOXES
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#define INDEX_COMBOBOX 0
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#define INDEX_COMBOBOX_ITEM 1
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#define INDEX_COMBOBOX_BUTTON 2
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#define INDEX_COMBOBOX_LIST 3
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#define CCHILDREN_COMBOBOX 3
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public:
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// -----------------------------
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// IUnknown interface
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// -----------------------------
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virtual HRESULT WINAPI QueryInterface(REFIID riid, void **ppvObject);
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#endif
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public:
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DWORD _fRightAlign:1; // Determines if the combo box should be right aligned
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DWORD _fListVisible:1; // Determines if list is visible
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DWORD _fOwnerDraw:1; // owner draw combo box
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DWORD _fOwnerDrawVar:1; // owner draw combo box with varibale height
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DWORD _fFocus:1; // do we have the focus?
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DWORD _fMousedown:1; // if the left button was down
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DWORD _fVisible:1; // window is visible
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DWORD _fEnabled:1; // window is enabled
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DWORD _fNoIntegralHeight:1; // no integral height
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DWORD _fCapture:1; // determines if the combo box has mouse cursor captured or not
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DWORD _fResizing:1; // flag to indicate we are resizing the window
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DWORD _fExtendedUI:1; // flag indicating if extended ui is used
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DWORD _fLBCBMessage:1; // flag indicating the message is LBCB_TRACKING
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DWORD _fIgnoreChange:1; // flag indicating there was an internal change of text in
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// the edit control
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DWORD _fIgnoreUpdate:1; // flag indicating if we should ignore the update flag, we need
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// this flag because there will be cases where updateWindow is
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// needed but we don't want to fire the notification
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DWORD _fButtonDown:1; // true when button is pressed
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DWORD _fDontWinNotify:1; // true when we don't want to call WinNotify for changes
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DWORD _fSendEditChange:1; // true when we need to send CBN_EDITCHANGE after painting the change
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// editbox
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DWORD _fShutDown:1; // true when we are shutting down
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HWND _hwndList; // window handle of listbox
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HCURSOR _hcurOld; // handle to the mouse cursor
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protected:
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RECT _rcWindow; // rect of window which the combo box was created with
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RECT _rcButton; // rect of button
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RECT _rcList; // rect of listbox
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// we have to have a minimum inset for either the right or left
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// to account for the button for the combo box
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int _dxRInset; // minimum right inset
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int _dxLInset; // minimum left inset
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int _dxROffset; // indents for right and left these values should be used
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int _dxLOffset; // with _dxRInset/_dxLInset to properly calculate the indents
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int _dyFont; // Height of the current font, may not necessarily be the system font
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int _dyEdit; // height of items
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int _cyCombo; // Height of the combo box
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int _cxCombo; // Width of the combo box
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int _cyList; // Height of the listbox
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int _cxList; // Width of the listbox set via CB_SETDROPWIDTH
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long _nCursor; // last selected cursor -2 by default
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BOOL _bSelOk; // used to help in determining what kind of notification to give
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UINT _idCtrl; // ID of control
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Combotype _cbType; // current combo box style
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CLstBxWinHost* _plbHost; // pointer to listbox host
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protected:
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// Draws the combo button
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void DrawButton(HDC hdc, BOOL bDown);
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// Sets the edit controls text to item of the list box
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void AutoUpdateEdit(int i);
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// Hilite the edit control
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void HiliteEdit(BOOL bSelect);
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// resizes the list box
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void SetDropSize(RECT* prc);
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// set the edit size
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void SetSizeEdit(int nLeft, int nTop, int nRight, int nBottom);
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// get the rect for the listbox
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void GetListBoxRect(RECT &rcList);
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public:
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// Constructor / Destructor
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CCmbBxWinHost();
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virtual ~CCmbBxWinHost();
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// initialization function
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virtual BOOL Init(HWND, const CREATESTRUCT *);
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// Window creation/destruction
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static LRESULT OnNCCreate(HWND hwnd, const CREATESTRUCT *pcs);
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static void OnNCDestroy(CCmbBxWinHost *ped);
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virtual LRESULT OnCreate(const CREATESTRUCT *pcs);
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// Edit control Text helper functions
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LRESULT GetEditText(LPTSTR szStr, int nSize);
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LRESULT GetTextLength();
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// Draws the focus rect for the edit control
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void DrawEditFocus(HDC);
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// Sets the text in the edit control to the text of the current item in the
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// list box
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void UpdateEditBox();
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// selects the item which has the same text string as the edit control
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int UpdateListBox(BOOL);
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// hides the listbox
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BOOL HideListBox(BOOL, BOOL);
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// shows the list box
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void ShowListBox(BOOL);
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// Used as a way for the listbox to communicate to the combo box about a selection
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void SetSelectionInfo(BOOL bOk, int nIdx);
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// Update the window but don't send the notification
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void UpdateCbWindow()
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{
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_fIgnoreUpdate = 1;
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TxViewChange(TRUE);
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_fIgnoreUpdate = 0;
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}
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BOOL DrawCustomFrame(WPARAM wParam, HDC hDCIn);
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/////////////////////////////// message handlers /////////////////////////////////
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// Richedit message
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LRESULT OnSetTextEx(WPARAM wparam, LPARAM lparam);
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// Keyboard messages
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virtual LRESULT OnKeyDown(WORD vKey, DWORD dwFlags);
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virtual LRESULT OnChar(WORD vKey, DWORD dwFlags);
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virtual LRESULT OnSyskeyDown(WORD vKey, DWORD dwFlags);
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// mouse messages
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LRESULT OnLButtonUp(WPARAM wparam, LPARAM lparam);
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LRESULT OnMouseMove(WPARAM wparam, LPARAM lparam);
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LRESULT OnMouseWheel(WPARAM wparam, LPARAM lparam);
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LRESULT OnSetCursor(WPARAM wparam, LPARAM lparam);
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LRESULT OnLButtonDown(WPARAM wparam, LPARAM lparam);
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LRESULT OnMouseLeave(WPARAM wparam, LPARAM lparam);
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// focus messages
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LRESULT OnSetFocus(WPARAM wparam, LPARAM lparam);
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LRESULT OnKillFocus(WPARAM wparam, LPARAM lparam);
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LRESULT OnCaptureChanged(WPARAM wparam, LPARAM lparam);
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// window messages
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LRESULT OnPaint(WPARAM, LPARAM);
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HRESULT OnCommand(WPARAM wparam, LPARAM lparam);
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LRESULT OnSize(WPARAM wparam, LPARAM lparam);
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LRESULT OnGetDlgCode(WPARAM wparam, LPARAM lparam);
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LRESULT OnEnable(WPARAM wparam, LPARAM lparam);
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// rich edit private message
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LRESULT OnSetEditStyle(WPARAM wparam, LPARAM lparam);
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//@cmember Notify host of events
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virtual HRESULT TxNotify(DWORD iNotify, void *pv);
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//@cmember Scroll the content of the specified window's client area
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virtual void TxScrollWindowEx (INT dx, INT dy, LPCRECT lprcScroll, LPCRECT lprcClip,
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HRGN hrgnUpdate, LPRECT lprcUpdate, UINT fuScroll);
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//@cmember Changes the mouse cursor
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virtual HCURSOR TxSetCursor2(HCURSOR hcur, BOOL bText)
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{ return (hcur) ? ::SetCursor(hcur) : ::GetCursor();}
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//@cmember InvalidateRect
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virtual void TxInvalidateRect(LPCRECT prc, BOOL fMode);
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//@cmember Retrieves the coordinates of a window's client area
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virtual HRESULT TxGetClientRect(LPRECT prc);
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///////////////////////// combo box message handlers ////////////////////////////
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// Calculates the rect's and height's of all the controls
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BOOL CbCalcControlRects(RECT* prc, BOOL bCalcChange);
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// Retrieves the drop width of the list box
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LRESULT CbGetDropWidth();
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// sets the drop width of the list box
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void CbSetDropWidth(WPARAM wparam);
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// Retrieves the item height for either the edit or list box
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LRESULT CbGetItemHeight(WPARAM wparam, LPARAM lparam);
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// sets the item height for either the edit or list box
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LRESULT CbSetItemHeight(WPARAM wparam, LPARAM lparam);
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// sets extendedUI mode
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LRESULT CbSetExtendedUI(BOOL bExtendedUI);
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// retrieves the current extendedUI mode
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LRESULT CbGetExtendedUI() const {return _fExtendedUI;}
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// forwards the WM_DRAWITEM, WM_DELETEITEM messages to the parent window
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LRESULT CbMessageItemHandler(HDC, int, WPARAM, LPARAM);
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#ifndef NOACCESSIBILITY
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////////////////////////// IAccessible Methods /////////////////////////////////
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HRESULT InitTypeInfo();
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STDMETHOD(get_accParent)(IDispatch **ppdispParent);
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STDMETHOD(get_accChildCount)(long *pcountChildren);
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STDMETHOD(get_accChild)(VARIANT varChild, IDispatch **ppdispChild);
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STDMETHOD(get_accName)(VARIANT varChild, BSTR *pszName);
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STDMETHOD(get_accValue)(VARIANT varChild, BSTR *pszValue);
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STDMETHOD(get_accRole)(VARIANT varChild, VARIANT *pvarRole);
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STDMETHOD(get_accState)(VARIANT varChild, VARIANT *pvarState);
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STDMETHOD(get_accKeyboardShortcut)(VARIANT varChild, BSTR *pszKeyboardShortcut);
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STDMETHOD(get_accFocus)(VARIANT *pvarChild);
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STDMETHOD(get_accSelection)(VARIANT *pvarChildren);
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STDMETHOD(get_accDefaultAction)(VARIANT varChild, BSTR *pszDefaultAction);
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STDMETHOD(accSelect)(long flagsSelect, VARIANT varChild);
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STDMETHOD(accLocation)(long *pxLeft, long *pyTop, long *pcxWidth, long *pcyHeight, VARIANT varChild);
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STDMETHOD(accNavigate)(long navDir, VARIANT varStart, VARIANT *pvarEndUpAt);
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STDMETHOD(accHitTest)(long xLeft, long yTop, VARIANT *pvarChild);
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STDMETHOD(accDoDefaultAction)(VARIANT varChild);
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#endif // NOACCESSIBILITY
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};
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#endif // NOWINDOWHOSTS
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#endif // _CBHOST_H
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