664 lines
19 KiB
C++
664 lines
19 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/tooltip.cpp
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// Purpose: wxToolTip class implementation for MSW
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 31.01.99
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// Copyright: (c) 1999 Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_TOOLTIPS
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#include "wx/tooltip.h"
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#ifndef WX_PRECOMP
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#include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
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#include "wx/app.h"
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#include "wx/control.h"
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#include "wx/module.h"
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#include "wx/toplevel.h"
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#endif
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#include "wx/tokenzr.h"
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#include "wx/vector.h"
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#include "wx/msw/private.h"
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#ifndef TTTOOLINFO_V1_SIZE
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#define TTTOOLINFO_V1_SIZE 0x28
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#endif
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#ifndef TTF_TRANSPARENT
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#define TTF_TRANSPARENT 0x0100
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#endif
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// VZ: normally, the trick with subclassing the tooltip control and processing
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// TTM_WINDOWFROMPOINT should work but, somehow, it doesn't. I leave the
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// code here for now (but it's not compiled) in case we need it later.
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//
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// For now I use an ugly workaround and process TTN_NEEDTEXT directly in
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// radio button wnd proc - fixing TTM_WINDOWFROMPOINT code would be nice
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// because it would then work for all controls, not only radioboxes but for
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// now I don't understand what's wrong with it...
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#define wxUSE_TTM_WINDOWFROMPOINT 0
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// ----------------------------------------------------------------------------
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// global variables
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// ----------------------------------------------------------------------------
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// the tooltip parent window
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WXHWND wxToolTip::ms_hwndTT = (WXHWND)NULL;
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// new tooltip maximum width, default value is set on first call to wxToolTip::Add()
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int wxToolTip::ms_maxWidth = 0;
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#if wxUSE_TTM_WINDOWFROMPOINT
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// the tooltip window proc
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static WNDPROC gs_wndprocToolTip = (WNDPROC)NULL;
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#endif // wxUSE_TTM_WINDOWFROMPOINT
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// This is simply a wrapper for vector<HWND> but defined as a class to hide the
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// details from the public header.
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class wxToolTipOtherWindows : public wxVector<WXHWND>
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{
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};
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// a wrapper around TOOLINFO Win32 structure
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#ifdef __VISUALC__
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#pragma warning( disable : 4097 ) // we inherit from a typedef - so what?
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#endif
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class wxToolInfo : public TOOLINFO
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{
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public:
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wxToolInfo(HWND hwndOwner, unsigned int id, const wxRect& rc)
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{
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// initialize all members
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::ZeroMemory(this, sizeof(TOOLINFO));
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// the structure TOOLINFO has been extended with a 4 byte field in
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// version 4.70 of comctl32.dll and another one in 5.01 but we don't
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// use these extended fields so use the old struct size to ensure that
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// the tooltips work on old (Windows 95) systems too
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cbSize = TTTOOLINFO_V1_SIZE;
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hwnd = hwndOwner;
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if (rc.IsEmpty())
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{
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uFlags = TTF_IDISHWND;
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uId = (UINT_PTR)hwndOwner;
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}
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else
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{
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// this tooltip must be shown only if the mouse hovers a specific rect
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// of the hwnd parameter!
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rect.left = rc.GetLeft();
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rect.right = rc.GetRight();
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rect.top = rc.GetTop();
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rect.bottom = rc.GetBottom();
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// note that not setting TTF_IDISHWND from the uFlags member means that the
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// ti.uId field should not contain the HWND but rather as MSDN says an
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// "Application-defined identifier of the tool"; this is used internally by
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// Windows to distinguish the different tooltips attached to the same window
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uId = id;
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}
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// we use TTF_TRANSPARENT to fix a problem which arises at least with
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// the text controls but may presumably happen with other controls
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// which display the tooltip at mouse position: it can start flashing
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// then as the control gets "focus lost" events and dismisses the
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// tooltip which then reappears because mouse remains hovering over the
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// control, see SF patch 1821229
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uFlags |= TTF_TRANSPARENT;
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}
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};
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// Takes care of deleting ToolTip control window when shutting down the library.
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class wxToolTipModule : public wxModule
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{
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public:
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wxToolTipModule()
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{
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}
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virtual bool OnInit() wxOVERRIDE
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{
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return true;
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}
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virtual void OnExit() wxOVERRIDE
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{
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wxToolTip::DeleteToolTipCtrl();
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}
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private:
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wxDECLARE_DYNAMIC_CLASS(wxToolTipModule);
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};
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wxIMPLEMENT_DYNAMIC_CLASS(wxToolTipModule, wxModule);
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#ifdef __VISUALC__
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#pragma warning( default : 4097 )
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#endif
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// ----------------------------------------------------------------------------
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// private functions
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// ----------------------------------------------------------------------------
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// send a message to the tooltip control if it exists
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//
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// NB: wParam is always 0 for the TTM_XXX messages we use
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static inline LRESULT SendTooltipMessage(WXHWND hwnd, UINT msg, void *lParam)
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{
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return hwnd ? ::SendMessage((HWND)hwnd, msg, 0, (LPARAM)lParam) : 0;
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}
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// send a message to all existing tooltip controls
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static inline void
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SendTooltipMessageToAll(WXHWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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if ( hwnd )
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::SendMessage((HWND)hwnd, msg, wParam, lParam);
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}
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// ============================================================================
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// implementation
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// ============================================================================
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#if wxUSE_TTM_WINDOWFROMPOINT
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// ----------------------------------------------------------------------------
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// window proc for our tooltip control
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// ----------------------------------------------------------------------------
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LRESULT APIENTRY wxToolTipWndProc(HWND hwndTT,
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UINT msg,
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WPARAM wParam,
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LPARAM lParam)
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{
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if ( msg == TTM_WINDOWFROMPOINT )
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{
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LPPOINT ppt = (LPPOINT)lParam;
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// the window on which event occurred
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HWND hwnd = ::WindowFromPoint(*ppt);
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OutputDebugString("TTM_WINDOWFROMPOINT: ");
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OutputDebugString(wxString::Format("0x%08x => ", hwnd));
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// return a HWND corresponding to a wxWindow because only wxWidgets are
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// associated with tooltips using TTM_ADDTOOL
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wxWindow *win = wxGetWindowFromHWND((WXHWND)hwnd);
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if ( win )
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{
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hwnd = GetHwndOf(win);
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OutputDebugString(wxString::Format("0x%08x\r\n", hwnd));
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#if 0
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// modify the point too!
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RECT rect;
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GetWindowRect(hwnd, &rect);
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ppt->x = (rect.right - rect.left) / 2;
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ppt->y = (rect.bottom - rect.top) / 2;
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#endif // 0
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return (LRESULT)hwnd;
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}
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else
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{
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OutputDebugString("no window\r\n");
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}
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}
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return ::CallWindowProc(CASTWNDPROC gs_wndprocToolTip, hwndTT, msg, wParam, lParam);
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}
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#endif // wxUSE_TTM_WINDOWFROMPOINT
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// ----------------------------------------------------------------------------
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// static functions
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// ----------------------------------------------------------------------------
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void wxToolTip::Enable(bool flag)
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{
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// Make sure the tooltip has been created
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(void) GetToolTipCtrl();
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SendTooltipMessageToAll(ms_hwndTT, TTM_ACTIVATE, flag, 0);
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}
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void wxToolTip::SetDelay(long milliseconds)
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{
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// Make sure the tooltip has been created
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(void) GetToolTipCtrl();
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SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
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TTDT_INITIAL, milliseconds);
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}
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void wxToolTip::SetAutoPop(long milliseconds)
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{
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SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
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TTDT_AUTOPOP, milliseconds);
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}
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void wxToolTip::SetReshow(long milliseconds)
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{
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SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
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TTDT_RESHOW, milliseconds);
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}
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void wxToolTip::SetMaxWidth(int width)
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{
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wxASSERT_MSG( width == -1 || width >= 0, wxT("invalid width value") );
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ms_maxWidth = width;
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}
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void wxToolTip::DeleteToolTipCtrl()
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{
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if ( ms_hwndTT )
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{
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::DestroyWindow((HWND)ms_hwndTT);
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ms_hwndTT = (WXHWND)NULL;
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}
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}
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// ---------------------------------------------------------------------------
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// implementation helpers
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// ---------------------------------------------------------------------------
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// create the tooltip ctrl for our parent frame if it doesn't exist yet
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/* static */
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WXHWND wxToolTip::GetToolTipCtrl()
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{
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if ( !ms_hwndTT )
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{
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WXDWORD exflags = 0;
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if ( wxApp::MSWGetDefaultLayout() == wxLayout_RightToLeft )
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{
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exflags |= WS_EX_LAYOUTRTL;
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}
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// we want to show the tooltips always (even when the window is not
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// active) and we don't want to strip "&"s from them
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ms_hwndTT = (WXHWND)::CreateWindowEx(exflags,
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TOOLTIPS_CLASS,
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(LPCTSTR)NULL,
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TTS_ALWAYSTIP | TTS_NOPREFIX,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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NULL, (HMENU)NULL,
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wxGetInstance(),
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NULL);
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if ( ms_hwndTT )
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{
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HWND hwnd = (HWND)ms_hwndTT;
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SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
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SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
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#if wxUSE_TTM_WINDOWFROMPOINT
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// subclass the newly created control
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gs_wndprocToolTip = wxSetWindowProc(hwnd, wxToolTipWndProc);
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#endif // wxUSE_TTM_WINDOWFROMPOINT
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}
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}
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return ms_hwndTT;
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}
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/* static */
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void wxToolTip::UpdateVisibility()
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{
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wxToolInfo ti(NULL, 0, wxRect());
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ti.uFlags = 0;
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if ( !SendTooltipMessage(ms_hwndTT, TTM_GETCURRENTTOOL, &ti) )
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return;
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wxWindow* const associatedWindow = wxFindWinFromHandle(ti.hwnd);
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if ( !associatedWindow )
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return;
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bool hideTT = false;
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if ( !associatedWindow->IsShownOnScreen() )
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{
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// If the associated window or its parent is hidden, the tooltip
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// shouldn't remain shown.
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hideTT = true;
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}
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else
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{
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// Even if it's not hidden, it could also be iconized.
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wxTopLevelWindow* const
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frame = wxDynamicCast(wxGetTopLevelParent(associatedWindow), wxTopLevelWindow);
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if ( frame && frame->IsIconized() )
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hideTT = true;
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}
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if ( hideTT )
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::ShowWindow(ms_hwndTT, SW_HIDE);
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}
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/* static */
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void wxToolTip::RelayEvent(WXMSG *msg)
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{
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, msg);
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}
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// ----------------------------------------------------------------------------
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// ctor & dtor
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// ----------------------------------------------------------------------------
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wxIMPLEMENT_ABSTRACT_CLASS(wxToolTip, wxObject);
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wxToolTip::wxToolTip(const wxString &tip)
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: m_text(tip)
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{
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m_window = NULL;
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m_others = NULL;
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// make sure m_rect.IsEmpty() == true
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m_rect.SetWidth(0);
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m_rect.SetHeight(0);
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// since m_rect is not valid, m_id is ignored by wxToolInfo ctor...
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m_id = 0;
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}
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wxToolTip::wxToolTip(wxWindow* win, unsigned int id, const wxString &tip, const wxRect& rc)
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: m_text(tip), m_rect(rc), m_id(id)
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{
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m_window = NULL;
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m_others = NULL;
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SetWindow(win);
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}
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wxToolTip::~wxToolTip()
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{
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// the tooltip has to be removed before deleting. Otherwise, if it is visible
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// while being deleted, there will be a delay before it goes away.
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Remove();
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delete m_others;
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}
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// ----------------------------------------------------------------------------
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// others
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// ----------------------------------------------------------------------------
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/* static */
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void wxToolTip::Remove(WXHWND hWnd, unsigned int id, const wxRect& rc)
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{
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wxToolInfo ti((HWND)hWnd, id, rc);
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, &ti);
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}
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void wxToolTip::DoRemove(WXHWND hWnd)
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{
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if ( m_window && hWnd == m_window->GetHWND() )
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{
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// Remove the tooltip from the main window.
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Remove(hWnd, m_id, m_rect);
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}
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else
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{
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// Not really sure what to pass to remove in this case...
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Remove(hWnd, 0, wxRect());
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}
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}
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void wxToolTip::Remove()
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{
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DoForAllWindows(&wxToolTip::DoRemove);
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}
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void wxToolTip::AddOtherWindow(WXHWND hWnd)
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{
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if ( !m_others )
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m_others = new wxToolTipOtherWindows;
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m_others->push_back(hWnd);
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DoAddHWND(hWnd);
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}
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void wxToolTip::DoAddHWND(WXHWND hWnd)
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{
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HWND hwnd = (HWND)hWnd;
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wxToolInfo ti(hwnd, m_id, m_rect);
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// another possibility would be to specify LPSTR_TEXTCALLBACK here as we
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// store the tooltip text ourselves anyhow, and provide it in response to
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// TTN_NEEDTEXT (sent via WM_NOTIFY), but then we would be limited to 79
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// character tooltips as this is the size of the szText buffer in
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// NMTTDISPINFO struct -- and setting the tooltip here we can have tooltips
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// of any length
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ti.hwnd = hwnd;
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ti.lpszText = wxMSW_CONV_LPTSTR(m_text);
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if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
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{
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wxLogDebug(wxT("Failed to create the tooltip '%s'"), m_text.c_str());
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return;
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}
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#ifdef TTM_SETMAXTIPWIDTH
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if ( !AdjustMaxWidth() )
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#endif // TTM_SETMAXTIPWIDTH
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{
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// replace the '\n's with spaces because otherwise they appear as
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// unprintable characters in the tooltip string
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m_text.Replace(wxT("\n"), wxT(" "));
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ti.lpszText = wxMSW_CONV_LPTSTR(m_text);
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if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
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{
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wxLogDebug(wxT("Failed to create the tooltip '%s'"), m_text.c_str());
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}
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}
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}
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void wxToolTip::SetWindow(wxWindow *win)
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{
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Remove();
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m_window = win;
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// add the window itself
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if ( m_window )
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{
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DoAddHWND(m_window->GetHWND());
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}
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#if !defined(__WXUNIVERSAL__)
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// and all of its subcontrols (e.g. radio buttons in a radiobox) as well
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wxControl *control = wxDynamicCast(m_window, wxControl);
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if ( control )
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{
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const wxArrayLong& subcontrols = control->GetSubcontrols();
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size_t count = subcontrols.GetCount();
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for ( size_t n = 0; n < count; n++ )
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{
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int id = subcontrols[n];
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HWND hwnd = GetDlgItem(GetHwndOf(m_window), id);
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if ( !hwnd )
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{
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// maybe it's a child of parent of the control, in fact?
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// (radiobuttons are subcontrols, i.e. children of the radiobox
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// for wxWidgets but are its siblings at Windows level)
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hwnd = GetDlgItem(GetHwndOf(m_window->GetParent()), id);
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}
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// must have it by now!
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wxASSERT_MSG( hwnd, wxT("no hwnd for subcontrol?") );
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AddOtherWindow((WXHWND)hwnd);
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}
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}
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#endif // !defined(__WXUNIVERSAL__)
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}
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void wxToolTip::SetRect(const wxRect& rc)
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{
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m_rect = rc;
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if ( m_window )
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{
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wxToolInfo ti(GetHwndOf(m_window), m_id, m_rect);
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_NEWTOOLRECT, &ti);
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}
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}
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void wxToolTip::SetTip(const wxString& tip)
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{
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m_text = tip;
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#ifdef TTM_SETMAXTIPWIDTH
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if ( !AdjustMaxWidth() )
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#endif // TTM_SETMAXTIPWIDTH
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{
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// replace the '\n's with spaces because otherwise they appear as
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// unprintable characters in the tooltip string
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m_text.Replace(wxT("\n"), wxT(" "));
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}
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DoForAllWindows(&wxToolTip::DoSetTip);
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|
}
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|
|
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void wxToolTip::DoSetTip(WXHWND hWnd)
|
|
{
|
|
// update the tip text shown by the control
|
|
wxToolInfo ti((HWND)hWnd, m_id, m_rect);
|
|
|
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// for some reason, changing the tooltip text directly results in
|
|
// repaint of the controls under it, see #10520 -- but this doesn't
|
|
// happen if we reset it first
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|
ti.lpszText = const_cast<wxChar *>(wxT(""));
|
|
(void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);
|
|
|
|
ti.lpszText = wxMSW_CONV_LPTSTR(m_text);
|
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);
|
|
}
|
|
|
|
bool wxToolTip::AdjustMaxWidth()
|
|
{
|
|
// use TTM_SETMAXTIPWIDTH to make tooltip multiline using the
|
|
// extent of its first line as max value
|
|
HFONT hfont = (HFONT)
|
|
SendTooltipMessage(GetToolTipCtrl(), WM_GETFONT, 0);
|
|
|
|
if ( !hfont )
|
|
{
|
|
hfont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
|
|
if ( !hfont )
|
|
{
|
|
wxLogLastError(wxT("GetStockObject(DEFAULT_GUI_FONT)"));
|
|
}
|
|
}
|
|
|
|
MemoryHDC hdc;
|
|
if ( !hdc )
|
|
{
|
|
wxLogLastError(wxT("CreateCompatibleDC(NULL)"));
|
|
}
|
|
|
|
if ( !SelectObject(hdc, hfont) )
|
|
{
|
|
wxLogLastError(wxT("SelectObject(hfont)"));
|
|
}
|
|
|
|
// find the width of the widest line
|
|
int maxWidth = 0;
|
|
wxStringTokenizer tokenizer(m_text, wxT("\n"));
|
|
while ( tokenizer.HasMoreTokens() )
|
|
{
|
|
const wxString token = tokenizer.GetNextToken();
|
|
|
|
SIZE sz;
|
|
if ( !::GetTextExtentPoint32(hdc, token.t_str(),
|
|
token.length(), &sz) )
|
|
{
|
|
wxLogLastError(wxT("GetTextExtentPoint32"));
|
|
}
|
|
|
|
if ( sz.cx > maxWidth )
|
|
maxWidth = sz.cx;
|
|
}
|
|
|
|
// limit size to ms_maxWidth, if set
|
|
if ( ms_maxWidth == 0 )
|
|
{
|
|
// this is more or less arbitrary but seems to work well
|
|
static const int DEFAULT_MAX_WIDTH = 400;
|
|
|
|
ms_maxWidth = wxGetClientDisplayRect().width / 2;
|
|
|
|
if ( ms_maxWidth > DEFAULT_MAX_WIDTH )
|
|
ms_maxWidth = DEFAULT_MAX_WIDTH;
|
|
}
|
|
|
|
if ( ms_maxWidth != -1 && maxWidth > ms_maxWidth )
|
|
maxWidth = ms_maxWidth;
|
|
|
|
// only set a new width if it is bigger than the current setting:
|
|
// otherwise adding a tooltip with shorter line(s) than a previous
|
|
// one would result in breaking the longer lines unnecessarily as
|
|
// all our tooltips share the same maximal width
|
|
if ( maxWidth > SendTooltipMessage(GetToolTipCtrl(),
|
|
TTM_GETMAXTIPWIDTH, 0) )
|
|
{
|
|
SendTooltipMessage(GetToolTipCtrl(), TTM_SETMAXTIPWIDTH,
|
|
wxUIntToPtr(maxWidth));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void wxToolTip::DoForAllWindows(void (wxToolTip::*func)(WXHWND))
|
|
{
|
|
if ( m_window )
|
|
{
|
|
(this->*func)(m_window->GetHWND());
|
|
}
|
|
|
|
if ( m_others )
|
|
{
|
|
for ( wxToolTipOtherWindows::const_iterator it = m_others->begin();
|
|
it != m_others->end();
|
|
++it )
|
|
{
|
|
(this->*func)(*it);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif // wxUSE_TOOLTIPS
|