wxToolTip for MSW implementation (it has several problems right now, but it
still works) git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1541 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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196
src/msw/tooltip.cpp
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196
src/msw/tooltip.cpp
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///////////////////////////////////////////////////////////////////////////////
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// Name: 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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// RCS-ID: $Id$
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// Copyright: (c) 1999 Vadim Zeitlin
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// Licence: wxWindows license
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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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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/tooltip.h"
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#include "wx/msw/private.h"
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#include <commctrl.h>
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// a simple wrapper around TOOLINFO Win32 structure
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class wxToolInfo : public TOOLINFO
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{
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public:
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wxToolInfo(wxWindow *win)
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{
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// initialize all members
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::ZeroMemory(this, sizeof(TOOLINFO));
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cbSize = sizeof(TOOLINFO);
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uFlags = TTF_IDISHWND;
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uId = (UINT)win->GetHWND();
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}
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};
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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
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inline LRESULT SendTooltipMessage(WXHWND hwnd,
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UINT msg,
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WPARAM wParam,
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void *lParam)
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{
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return hwnd ? ::SendMessage((HWND)hwnd, msg, wParam, (LPARAM)lParam)
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: 0;
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}
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// "semiglobal" functions - these methods work with the tooltip control which
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// is shared among all the wxToolTips of the same frame
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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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WXHWND wxToolTip::GetToolTipCtrl()
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{
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wxWindow *parent = m_window;
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while ( parent && !parent->IsKindOf(CLASSINFO(wxFrame)) )
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{
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parent = parent->GetParent();
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}
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wxCHECK_MSG( parent, 0, "can't create tooltip control outside a frame" );
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wxFrame *frame = (wxFrame *)parent;
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HWND hwndTT = (HWND)frame->GetToolTipCtrl();
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if ( !hwndTT )
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{
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hwndTT = ::CreateWindow(TOOLTIPS_CLASS,
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(LPSTR)NULL,
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TTS_ALWAYSTIP,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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(HWND)frame->GetHWND(), (HMENU)NULL,
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wxGetInstance(), NULL);
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if ( hwndTT )
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{
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frame->SetToolTipCtrl((WXHWND)hwndTT);
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}
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else
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{
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wxLogSysError(_("Can not create tooltip control"));
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}
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}
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return (WXHWND)hwndTT;
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}
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void wxToolTip::Enable(bool flag)
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{
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_ACTIVATE, flag, 0);
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}
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void wxToolTip::RelayEvent(WXMSG *msg)
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{
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, 0, msg);
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}
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void wxToolTip::SetDelay(long milliseconds)
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{
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_SETDELAYTIME,
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TTDT_INITIAL, (void *)milliseconds);
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}
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// ----------------------------------------------------------------------------
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// ctor & dtor
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// ----------------------------------------------------------------------------
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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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}
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wxToolTip::~wxToolTip()
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{
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// there is no need to Remove() this tool - it will be done automatically
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// anyhow
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}
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// ----------------------------------------------------------------------------
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// others
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// ----------------------------------------------------------------------------
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void wxToolTip::Remove()
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{
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// remove this tool from the tooltip control
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if ( m_window )
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{
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wxToolInfo ti(m_window);
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, 0, &ti);
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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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if ( m_window )
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{
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wxToolInfo ti(m_window);
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// as we store our text anyhow, it seems useless to waste system memory
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// by asking the tooltip ctrl to remember it too - instead it will send
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// us TTN_NEEDTEXT (via WM_NOTIFY) when it is about to be shown
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ti.hwnd = (HWND)m_window->GetHWND();
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ti.lpszText = LPSTR_TEXTCALLBACK;
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// instead of: ti.lpszText = (char *)m_text.c_str();
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if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, 0, &ti) )
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{
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wxLogSysError(_("Failed to create the tooltip '%s'"),
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m_text.c_str());
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}
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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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if ( m_window )
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{
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// update it immediately
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wxToolInfo ti(m_window);
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ti.lpszText = (char *)m_text.c_str();
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(void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, 0, &ti);
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}
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}
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