f97ef56b88
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20561 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
456 lines
11 KiB
C++
456 lines
11 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/common/cshelp.cpp
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// Purpose: Context sensitive help class implementation
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// Author: Julian Smart, Vadim Zeitlin
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// Modified by:
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// Created: 08/09/2000
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// RCS-ID: $Id$
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// Copyright: (c) 2000 Julian Smart, 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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#ifdef __GNUG__
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#pragma implementation "cshelp.h"
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#endif
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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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_HELP
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#ifndef WX_PRECOMP
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#endif
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#include "wx/tipwin.h"
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#include "wx/app.h"
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#include "wx/module.h"
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#include "wx/cshelp.h"
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// ----------------------------------------------------------------------------
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// wxContextHelpEvtHandler private class
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// ----------------------------------------------------------------------------
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// This class exists in order to eat events until the left mouse button is
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// pressed
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class wxContextHelpEvtHandler: public wxEvtHandler
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{
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public:
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wxContextHelpEvtHandler(wxContextHelp* contextHelp)
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{
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m_contextHelp = contextHelp;
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}
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virtual bool ProcessEvent(wxEvent& event);
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//// Data
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wxContextHelp* m_contextHelp;
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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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// wxContextHelp
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// ----------------------------------------------------------------------------
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/*
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* Invokes context-sensitive help
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*/
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IMPLEMENT_DYNAMIC_CLASS(wxContextHelp, wxObject)
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wxContextHelp::wxContextHelp(wxWindow* win, bool beginHelp)
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{
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m_inHelp = FALSE;
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if (beginHelp)
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BeginContextHelp(win);
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}
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wxContextHelp::~wxContextHelp()
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{
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if (m_inHelp)
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EndContextHelp();
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}
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// Not currently needed, but on some systems capture may not work as
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// expected so we'll leave it here for now.
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#if 0
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static void wxPushOrPopEventHandlers(wxContextHelp* help, wxWindow* win, bool push)
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{
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if (push)
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win->PushEventHandler(new wxContextHelpEvtHandler(help));
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else
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win->PopEventHandler();
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wxNode* node = win->GetChildren().First();
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while (node)
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{
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wxWindow* child = (wxWindow*) node->Data();
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wxPushOrPopEventHandlers(help, child, push);
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node = node->Next();
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}
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}
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#endif
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// Begin 'context help mode'
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bool wxContextHelp::BeginContextHelp(wxWindow* win)
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{
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if (!win)
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win = wxTheApp->GetTopWindow();
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if (!win)
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return FALSE;
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wxCursor cursor(wxCURSOR_QUESTION_ARROW);
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wxCursor oldCursor = win->GetCursor();
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win->SetCursor(cursor);
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#ifdef __WXMSW__
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// wxSetCursor(cursor);
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#endif
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m_status = FALSE;
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win->PushEventHandler(new wxContextHelpEvtHandler(this));
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//wxPushOrPopEventHandlers(this, win, TRUE);
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win->CaptureMouse();
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EventLoop();
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win->ReleaseMouse();
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win->PopEventHandler(TRUE);
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//wxPushOrPopEventHandlers(this, win, FALSE);
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win->SetCursor(oldCursor);
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if (m_status)
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{
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wxPoint pt;
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wxWindow* winAtPtr = wxFindWindowAtPointer(pt);
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/*
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if (winAtPtr)
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{
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wxString msg;
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msg.Printf("Picked %s (%d)", (const char*) winAtPtr->GetName(), winAtPtr->GetId());
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cout << msg << '\n';
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}
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*/
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if (winAtPtr)
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DispatchEvent(winAtPtr, pt);
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}
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return TRUE;
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}
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bool wxContextHelp::EndContextHelp()
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{
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m_inHelp = FALSE;
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return TRUE;
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}
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bool wxContextHelp::EventLoop()
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{
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m_inHelp = TRUE;
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while ( m_inHelp )
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{
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if (wxTheApp->Pending())
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{
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wxTheApp->Dispatch();
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}
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else
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{
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wxTheApp->ProcessIdle();
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}
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}
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return TRUE;
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}
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bool wxContextHelpEvtHandler::ProcessEvent(wxEvent& event)
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{
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if (event.GetEventType() == wxEVT_LEFT_DOWN)
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{
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m_contextHelp->SetStatus(TRUE);
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m_contextHelp->EndContextHelp();
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return TRUE;
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}
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if ((event.GetEventType() == wxEVT_CHAR) ||
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(event.GetEventType() == wxEVT_KEY_DOWN) ||
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(event.GetEventType() == wxEVT_ACTIVATE) ||
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(event.GetEventType() == wxEVT_MOUSE_CAPTURE_CHANGED))
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{
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// May have already been set to TRUE by a left-click
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//m_contextHelp->SetStatus(FALSE);
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m_contextHelp->EndContextHelp();
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return TRUE;
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}
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if ((event.GetEventType() == wxEVT_PAINT) ||
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(event.GetEventType() == wxEVT_ERASE_BACKGROUND))
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{
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event.Skip();
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return FALSE;
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}
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return TRUE;
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}
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// Dispatch the help event to the relevant window
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bool wxContextHelp::DispatchEvent(wxWindow* win, const wxPoint& pt)
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{
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wxWindow* subjectOfHelp = win;
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bool eventProcessed = FALSE;
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while (subjectOfHelp && !eventProcessed)
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{
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wxHelpEvent helpEvent(wxEVT_HELP, subjectOfHelp->GetId(), pt) ;
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helpEvent.SetEventObject(this);
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eventProcessed = win->GetEventHandler()->ProcessEvent(helpEvent);
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// Go up the window hierarchy until the event is handled (or not).
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// I.e. keep submitting ancestor windows until one is recognised
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// by the app code that processes the ids and displays help.
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subjectOfHelp = subjectOfHelp->GetParent();
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}
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return eventProcessed;
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}
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// ----------------------------------------------------------------------------
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// wxContextHelpButton
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// ----------------------------------------------------------------------------
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/*
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* wxContextHelpButton
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* You can add this to your dialogs (especially on non-Windows platforms)
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* to put the application into context help mode.
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*/
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static const char * csquery_xpm[] = {
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"12 11 2 1",
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" c None",
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". c #000000",
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" ",
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" .... ",
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" .. .. ",
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" .. .. ",
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" .. ",
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" .. ",
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" .. ",
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" ",
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" .. ",
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" .. ",
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" "};
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IMPLEMENT_CLASS(wxContextHelpButton, wxBitmapButton)
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BEGIN_EVENT_TABLE(wxContextHelpButton, wxBitmapButton)
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EVT_BUTTON(wxID_CONTEXT_HELP, wxContextHelpButton::OnContextHelp)
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END_EVENT_TABLE()
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wxContextHelpButton::wxContextHelpButton(wxWindow* parent,
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wxWindowID id,
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const wxPoint& pos,
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const wxSize& size,
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long style)
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#if defined(__WXPM__)
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: wxBitmapButton(parent, id, wxBitmap(wxCSQUERY_BITMAP
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,wxBITMAP_TYPE_RESOURCE
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),
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pos, size, style)
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#else
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: wxBitmapButton(parent, id, wxBitmap(csquery_xpm),
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pos, size, style)
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#endif
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{
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}
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void wxContextHelpButton::OnContextHelp(wxCommandEvent& WXUNUSED(event))
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{
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wxContextHelp contextHelp(GetParent());
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}
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// ----------------------------------------------------------------------------
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// wxHelpProvider
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// ----------------------------------------------------------------------------
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wxHelpProvider *wxHelpProvider::ms_helpProvider = (wxHelpProvider *)NULL;
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// trivial implementation of some methods which we don't want to make pure
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// virtual for convenience
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void wxHelpProvider::AddHelp(wxWindowBase * WXUNUSED(window),
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const wxString& WXUNUSED(text))
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{
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}
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void wxHelpProvider::AddHelp(wxWindowID WXUNUSED(id),
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const wxString& WXUNUSED(text))
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{
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}
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// removes the association
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void wxHelpProvider::RemoveHelp(wxWindowBase* WXUNUSED(window))
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{
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}
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wxHelpProvider::~wxHelpProvider()
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{
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}
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// ----------------------------------------------------------------------------
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// wxSimpleHelpProvider
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// ----------------------------------------------------------------------------
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wxString wxSimpleHelpProvider::GetHelp(const wxWindowBase *window)
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{
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bool wasFound;
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wxString text = m_hashWindows.Get((long)window, &wasFound);
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if ( !wasFound )
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text = m_hashIds.Get(window->GetId());
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return text;
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}
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void wxSimpleHelpProvider::AddHelp(wxWindowBase *window, const wxString& text)
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{
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m_hashWindows.Delete((long)window);
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m_hashWindows.Put((long)window, text);
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}
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void wxSimpleHelpProvider::AddHelp(wxWindowID id, const wxString& text)
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{
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m_hashIds.Delete((long)id);
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m_hashIds.Put(id, text);
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}
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// removes the association
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void wxSimpleHelpProvider::RemoveHelp(wxWindowBase* window)
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{
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m_hashWindows.Delete((long)window);
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}
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bool wxSimpleHelpProvider::ShowHelp(wxWindowBase *window)
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{
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#if wxUSE_TIPWINDOW
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static wxTipWindow* s_tipWindow = NULL;
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if (s_tipWindow)
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{
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// Prevent s_tipWindow being nulled in OnIdle,
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// thereby removing the chance for the window to be closed by ShowHelp
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s_tipWindow->SetTipWindowPtr(NULL);
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s_tipWindow->Close();
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}
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s_tipWindow = NULL;
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wxString text = GetHelp(window);
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if ( !text.empty() )
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{
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s_tipWindow = new wxTipWindow((wxWindow *)window, text, 100, & s_tipWindow);
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return TRUE;
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}
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#endif // wxUSE_TIPWINDOW
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return FALSE;
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}
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// ----------------------------------------------------------------------------
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// wxHelpControllerHelpProvider
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// ----------------------------------------------------------------------------
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wxHelpControllerHelpProvider::wxHelpControllerHelpProvider(wxHelpControllerBase* hc)
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{
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m_helpController = hc;
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}
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bool wxHelpControllerHelpProvider::ShowHelp(wxWindowBase *window)
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{
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wxString text = GetHelp(window);
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if ( !text.empty() )
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{
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if (m_helpController)
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{
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if (text.IsNumber())
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return m_helpController->DisplayContextPopup(wxAtoi(text));
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// If the help controller is capable of popping up the text...
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else if (m_helpController->DisplayTextPopup(text, wxGetMousePosition()))
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{
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return TRUE;
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}
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else
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// ...else use the default method.
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return wxSimpleHelpProvider::ShowHelp(window);
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}
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else
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return wxSimpleHelpProvider::ShowHelp(window);
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}
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return FALSE;
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}
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// Convenience function for turning context id into wxString
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wxString wxContextId(int id)
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{
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return wxString(IntToString(id));
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}
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// ----------------------------------------------------------------------------
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// wxHelpProviderModule: module responsible for cleaning up help provider.
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// ----------------------------------------------------------------------------
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class wxHelpProviderModule : public wxModule
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{
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public:
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bool OnInit();
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void OnExit();
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private:
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DECLARE_DYNAMIC_CLASS(wxHelpProviderModule)
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};
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IMPLEMENT_DYNAMIC_CLASS(wxHelpProviderModule, wxModule)
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bool wxHelpProviderModule::OnInit()
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{
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// Probably we don't want to do anything by default,
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// since it could pull in extra code
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// wxHelpProvider::Set(new wxSimpleHelpProvider);
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return TRUE;
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}
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void wxHelpProviderModule::OnExit()
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{
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if (wxHelpProvider::Get())
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{
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delete wxHelpProvider::Get();
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wxHelpProvider::Set(NULL);
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}
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}
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#endif // wxUSE_HELP
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