511 lines
15 KiB
C++
511 lines
15 KiB
C++
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/****************************************************************************
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Copyright (c) 1998-1999 Microsoft Corporation
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Module Name: cplinputlimiter.cpp
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Author: toddb - 10/06/98
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****************************************************************************/
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#include "cplPreComp.h"
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class CInputLimiter
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{
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public:
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BOOL SubclassWindow(HWND hwnd, DWORD dwFlags);
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static VOID HideToolTip();
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protected:
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BOOL OnChar( HWND hwnd, TCHAR wParam );
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LRESULT OnPaste(HWND hwnd, WPARAM wParam, LPARAM lParam);
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BOOL IsValidChar(TCHAR ch, BOOL bPaste);
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BOOL UnsubclassWindow(HWND hwnd);
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void ShowToolTip(HWND hwnd);
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void CreateToolTipWindow(HWND hwnd);
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static LRESULT CALLBACK SubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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static LRESULT CALLBACK ListenerProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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static VOID CALLBACK TimerProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime);
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DWORD m_dwFlags; // determines which characters are allowed
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WNDPROC m_pfnSuperProc; // the super class proc
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static HWND s_hwndToolTip; // shared by all instances
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static UINT_PTR s_uTimerID; // shared timer
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static TCHAR s_szTipText[512]; // the text to be shown in the tooltip
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};
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HWND CInputLimiter::s_hwndToolTip = NULL;
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UINT_PTR CInputLimiter::s_uTimerID = 0;
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TCHAR CInputLimiter::s_szTipText[512] = {0};
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// Limiting the input on a combo box is a special case because you first
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// have to find the edit box and then LimitInput on that.
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BOOL CALLBACK FindTheEditBox( HWND hwnd, LPARAM lParam )
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{
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// The combo box only has one child, subclass it
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LimitInput(hwnd,(DWORD)lParam);
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return FALSE;
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}
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BOOL LimitCBInput(HWND hwnd, DWORD dwFlags)
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{
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return EnumChildWindows(hwnd, FindTheEditBox, dwFlags);
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}
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BOOL LimitInput(HWND hwnd, DWORD dwFlags)
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{
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CInputLimiter * pil = new CInputLimiter;
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if (!pil)
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{
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return FALSE;
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}
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BOOL bResult = pil->SubclassWindow(hwnd, dwFlags);
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if (!bResult)
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{
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delete pil;
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}
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return bResult;
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}
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void HideToolTip()
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{
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CInputLimiter::HideToolTip();
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}
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BOOL CInputLimiter::SubclassWindow(HWND hwnd, DWORD dwFlags)
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{
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if ( !IsWindow(hwnd) )
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return FALSE;
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m_dwFlags = dwFlags;
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SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)this);
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m_pfnSuperProc = (WNDPROC)GetWindowLongPtr(hwnd, GWLP_WNDPROC);
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SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)CInputLimiter::SubclassProc);
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return TRUE;
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}
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BOOL CInputLimiter::UnsubclassWindow(HWND hwnd)
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{
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SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)m_pfnSuperProc);
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m_dwFlags = 0;
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delete this;
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return TRUE;
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}
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LRESULT CALLBACK CInputLimiter::SubclassProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
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{
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CInputLimiter * pthis = (CInputLimiter*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
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// cache pthis->m_pfnSuperProc because we always need in and
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// pthis might be deleted before we get around to using it
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WNDPROC pfn = pthis->m_pfnSuperProc;
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switch (uMsg)
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{
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case WM_CHAR:
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if (!pthis->OnChar(hwnd, (TCHAR)wParam))
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{
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return 0;
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}
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break;
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case WM_PASTE:
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return pthis->OnPaste(hwnd, wParam, lParam);
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case WM_KILLFOCUS:
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HideToolTip();
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break;
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case WM_DESTROY:
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pthis->UnsubclassWindow(hwnd);
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break;
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default:
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break;
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}
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return CallWindowProc(pfn, hwnd, uMsg, wParam, lParam);
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}
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BOOL CInputLimiter::OnChar( HWND hwnd, TCHAR ch )
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{
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// if the char is a good one return TRUE, this will pass the char on to the
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// default window proc. For a bad character do a beep and then display the
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// ballon tooltip pointing at the control.
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if ( IsValidChar(ch, FALSE) )
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return TRUE;
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// if we get here then an invalid character was entered
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MessageBeep(MB_OK);
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ShowToolTip(hwnd);
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return FALSE;
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}
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BOOL CInputLimiter::IsValidChar(TCHAR ch, BOOL bPaste)
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{
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// certain characters get converted into WM_CHAR messages even though we don't want
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// to consider them. We check for these characters first. Currently, this list includes:
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// backspace
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// control characters, such as ctrl-x and ctrl-v
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if ( ch == TEXT('\b') )
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return TRUE;
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if ( !bPaste && (0x8000 & GetKeyState(VK_CONTROL)) )
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return TRUE;
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if ( m_dwFlags & LIF_ALLOWALPHA )
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{
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if ( (ch >= TEXT('a') && ch <= TEXT('z')) || (ch >= TEXT('A') && ch <= TEXT('Z')) )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWNUMBER )
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{
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if ( ch >= TEXT('0') && ch <= TEXT('9') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWDASH )
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{
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if ( ch == TEXT('-') || ch == TEXT('(') || ch == TEXT(')'))
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWPOUND )
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{
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if ( ch == TEXT('#') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWSTAR )
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{
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if ( ch == TEXT('*') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWSPACE )
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{
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if ( ch == TEXT(' ') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWCOMMA )
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{
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if ( ch == TEXT(',') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWPLUS )
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{
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if ( ch == TEXT('+') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWBANG )
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{
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if ( ch == TEXT('!') )
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{
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return TRUE;
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}
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}
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if ( m_dwFlags & LIF_ALLOWATOD )
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{
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if ( (ch >= TEXT('a') && ch <= TEXT('d')) || (ch >= TEXT('A') && ch <= TEXT('D')) )
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{
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return TRUE;
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}
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}
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return FALSE;
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}
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void CInputLimiter::ShowToolTip(HWND hwnd)
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{
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if ( !s_hwndToolTip )
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{
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CreateToolTipWindow(hwnd);
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}
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// Set the tooltip display point
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RECT rc;
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GetWindowRect(hwnd, &rc);
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SendMessage(s_hwndToolTip, TTM_TRACKPOSITION, 0, MAKELONG((rc.left+rc.right)/2,rc.bottom));
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TOOLINFO ti = {0};
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ti.cbSize = sizeof(ti);
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ti.hwnd = NULL;
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ti.uId = 1;
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// Set the tooltip text
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UINT iStrID;
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if ( m_dwFlags == LIF_ALLOWNUMBER )
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{
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// use the "0-9" text
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iStrID = IDS_DIGITSONLY;
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}
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else if ( m_dwFlags == (LIF_ALLOWNUMBER|LIF_ALLOWSPACE) )
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{
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// use the "0-9, ' '" text
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iStrID = IDS_DIGITLIST;
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}
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else if ( m_dwFlags == (LIF_ALLOWNUMBER|LIF_ALLOWSPACE|LIF_ALLOWCOMMA) )
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{
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// use the "0-9, ' ', ','" text
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iStrID = IDS_MULTIDIGITLIST;
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}
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else if ( m_dwFlags == (LIF_ALLOWNUMBER|LIF_ALLOWSTAR|LIF_ALLOWPOUND|LIF_ALLOWCOMMA) )
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{
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// use the "0-9, #, *, ','" text
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iStrID = IDS_PHONEPADCHAR;
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}
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else if ( m_dwFlags == (LIF_ALLOWNUMBER|LIF_ALLOWPOUND|LIF_ALLOWSTAR|LIF_ALLOWSPACE|LIF_ALLOWCOMMA) )
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{
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// use the "0-9, #, *, ' ', ','" text
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iStrID = IDS_PHONENUMBERCHAR;
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}
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else if ( m_dwFlags == (LIF_ALLOWNUMBER|LIF_ALLOWPOUND|LIF_ALLOWSTAR|LIF_ALLOWSPACE|LIF_ALLOWCOMMA|LIF_ALLOWPLUS|LIF_ALLOWBANG|LIF_ALLOWATOD) )
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{
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// use the "0-9, A-D, a-d, #, *, +, !, ' ', ',' " text
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iStrID = IDS_PHONENUMBERCHAREXT;
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}
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else
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{
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// We should never reach this point, but if we do then we display a generic invalid character dialog
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iStrID = IDS_ALLPHONECHARS;
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}
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LoadString(GetUIInstance(),iStrID,s_szTipText,ARRAYSIZE(s_szTipText));
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ti.lpszText = s_szTipText;
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SendMessage(s_hwndToolTip, TTM_UPDATETIPTEXT, 0, (LPARAM)&ti);
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// Show the tooltip
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SendMessage(s_hwndToolTip, TTM_TRACKACTIVATE, TRUE, (LPARAM)&ti);
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// Set a timer to hide the tooltip
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if ( s_uTimerID )
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{
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KillTimer(NULL,s_uTimerID);
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}
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s_uTimerID = SetTimer(NULL, 0, 10000, (TIMERPROC)CInputLimiter::TimerProc);
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}
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// CreateToolTipWindow
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//
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// Creates our tooltip control. We share this one tooltip control and use it for all invalid
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// input messages. The control is hiden when not in use and then shown when needed.
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//
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void CInputLimiter::CreateToolTipWindow(HWND hwnd)
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{
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HWND hwndParent;
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do
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{
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hwndParent = hwnd;
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hwnd = GetParent(hwnd);
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} while (hwnd);
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s_hwndToolTip = CreateWindow(TOOLTIPS_CLASS, NULL,
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WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP | TTS_BALLOON,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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hwndParent, NULL, GetUIInstance(),
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NULL);
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if (s_hwndToolTip)
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{
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SetWindowPos(s_hwndToolTip, HWND_TOPMOST,
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0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
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TOOLINFO ti = {0};
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RECT rc = {2,2,2,2};
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ti.cbSize = sizeof(ti);
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ti.uFlags = TTF_TRACK | TTF_TRANSPARENT;
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ti.hwnd = NULL;
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ti.uId = 1;
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ti.lpszText = s_szTipText;
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// set the version so we can have non buggy mouse event forwarding
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SendMessage(s_hwndToolTip, CCM_SETVERSION, COMCTL32_VERSION, 0);
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SendMessage(s_hwndToolTip, TTM_ADDTOOL, 0, (LPARAM)&ti);
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SendMessage(s_hwndToolTip, TTM_SETMAXTIPWIDTH, 0, 500);
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SendMessage(s_hwndToolTip, TTM_SETMARGIN, 0, (LPARAM)&rc);
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}
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}
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VOID CALLBACK CInputLimiter::TimerProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
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{
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// When the timer fires we hide the tooltip window
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HideToolTip();
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}
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void CInputLimiter::HideToolTip()
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{
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if ( s_uTimerID )
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{
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KillTimer(NULL,s_uTimerID);
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s_uTimerID = 0;
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}
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if ( s_hwndToolTip )
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{
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PostMessage(s_hwndToolTip, TTM_TRACKACTIVATE, FALSE, 0);
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}
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}
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LRESULT CInputLimiter::OnPaste(HWND hwnd, WPARAM wParam, LPARAM lParam)
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{
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// There are hundred of lines of code in user to successfully handle a paste into an edit control.
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// We need to leverage all that code while still disallowing invalid input to result from the paste.
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// As a result, what we need to do is to get the clip board data, validate that data, place the
|
||
|
|
// valid data back onto the clipboard, call the default window proc to let user do it's thing, and
|
||
|
|
// then restore the clipboard to it's original format.
|
||
|
|
if ( OpenClipboard(hwnd) )
|
||
|
|
{
|
||
|
|
HANDLE hdata;
|
||
|
|
UINT iFormat;
|
||
|
|
DWORD cchBad = 0; // count of the number of bad characters
|
||
|
|
|
||
|
|
// REVIEW: Should this be based on the compile type or the window type?
|
||
|
|
// Compile time check for the correct clipboard format to use:
|
||
|
|
if ( sizeof(WCHAR) == sizeof(TCHAR) )
|
||
|
|
{
|
||
|
|
iFormat = CF_UNICODETEXT;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
iFormat = CF_TEXT;
|
||
|
|
}
|
||
|
|
|
||
|
|
hdata = GetClipboardData(iFormat);
|
||
|
|
|
||
|
|
if ( hdata )
|
||
|
|
{
|
||
|
|
LPTSTR pszData;
|
||
|
|
pszData = (LPTSTR)GlobalLock(hdata);
|
||
|
|
if ( pszData )
|
||
|
|
{
|
||
|
|
DWORD dwSize;
|
||
|
|
HANDLE hClone;
|
||
|
|
HANDLE hNew;
|
||
|
|
|
||
|
|
// we need to copy the original data because the clipboard owns the hdata
|
||
|
|
// pointer. That data will be invalid after we call SetClipboardData.
|
||
|
|
// We start by calculating the size of the data:
|
||
|
|
dwSize = (DWORD)GlobalSize(hdata)+sizeof(TCHAR);
|
||
|
|
|
||
|
|
// Use the prefered GlobalAlloc for clipboard data
|
||
|
|
hClone = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE, dwSize);
|
||
|
|
hNew = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE, dwSize);
|
||
|
|
if ( hClone && hNew )
|
||
|
|
{
|
||
|
|
LPTSTR pszClone;
|
||
|
|
LPTSTR pszNew;
|
||
|
|
|
||
|
|
pszClone = (LPTSTR)GlobalLock(hClone);
|
||
|
|
pszNew = (LPTSTR)GlobalLock(hNew);
|
||
|
|
if ( pszClone && pszNew )
|
||
|
|
{
|
||
|
|
int iNew = 0;
|
||
|
|
|
||
|
|
// copy the original data as-is
|
||
|
|
memcpy((LPVOID)pszClone, (LPVOID)pszData, (size_t)dwSize);
|
||
|
|
// ensure that it's NULL terminated
|
||
|
|
pszClone[ (dwSize/sizeof(TCHAR))-1 ] = NULL;
|
||
|
|
|
||
|
|
for ( LPTSTR psz = pszClone; *psz; psz++ )
|
||
|
|
{
|
||
|
|
if ( IsValidChar(*psz, TRUE) )
|
||
|
|
{
|
||
|
|
pszNew[iNew++] = *psz;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
cchBad++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pszNew[iNew] = NULL;
|
||
|
|
|
||
|
|
// If there are any characters in the paste buffer then we paste the validated string
|
||
|
|
if ( *pszNew )
|
||
|
|
{
|
||
|
|
// we always set the new string. Worst case it's identical to the old string
|
||
|
|
GlobalUnlock(hNew);
|
||
|
|
pszNew = NULL;
|
||
|
|
SetClipboardData(iFormat, hNew);
|
||
|
|
hNew = NULL;
|
||
|
|
|
||
|
|
// call the super proc to do the paste
|
||
|
|
CallWindowProc(m_pfnSuperProc, hwnd, WM_PASTE, wParam, lParam);
|
||
|
|
|
||
|
|
// The above call will have closed the clipboard on us. We try to re-open it.
|
||
|
|
// If this fails it's no big deal, that simply means the SetClipboardData
|
||
|
|
// call below will fail which is good if somebody else managed to open the
|
||
|
|
// clipboard in the mean time.
|
||
|
|
OpenClipboard(hwnd);
|
||
|
|
|
||
|
|
// and then we always set it back to the original value.
|
||
|
|
GlobalUnlock(hClone);
|
||
|
|
pszClone = NULL;
|
||
|
|
SetClipboardData(iFormat, hClone);
|
||
|
|
hClone = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( pszClone )
|
||
|
|
{
|
||
|
|
GlobalUnlock(hClone);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( pszNew )
|
||
|
|
{
|
||
|
|
GlobalUnlock(hNew);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( hClone )
|
||
|
|
{
|
||
|
|
GlobalFree( hClone );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( hNew )
|
||
|
|
{
|
||
|
|
GlobalFree( hNew );
|
||
|
|
}
|
||
|
|
|
||
|
|
// at this point we are done with hdata so unlock it
|
||
|
|
GlobalUnlock(hdata);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
CloseClipboard();
|
||
|
|
|
||
|
|
if ( cchBad )
|
||
|
|
{
|
||
|
|
// Show the error balloon
|
||
|
|
MessageBeep(MB_OK);
|
||
|
|
|
||
|
|
ShowToolTip(hwnd);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return TRUE;
|
||
|
|
}
|