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popupcmn.cpp
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C/C++ Source or Header
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2002-06-18
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484 lines
///////////////////////////////////////////////////////////////////////////////
// Name: common/popupcmn.cpp
// Purpose: implementation of wxPopupTransientWindow
// Author: Vadim Zeitlin
// Modified by:
// Created: 06.01.01
// RCS-ID: $Id: popupcmn.cpp,v 1.31 2002/06/18 14:43:55 DW Exp $
// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// License: wxWindows license
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "popupwinbase.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_POPUPWIN && !defined(__WXMOTIF__)
#include "wx/popupwin.h"
#ifndef WX_PRECOMP
#include "wx/combobox.h" // wxComboControl
#include "wx/app.h" // wxPostEvent
#include "wx/log.h"
#include "wx/app.h"
#endif //WX_PRECOMP
#ifdef __WXUNIVERSAL__
#include "wx/univ/renderer.h"
#endif // __WXUNIVERSAL__
// there is no src/mgl/popupwin.cpp to put this in, so we do it here - BTW we
// probably could do it for all ports here just as well
#if defined(__WXMGL__)
IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
#endif // __WXMSW__
IMPLEMENT_DYNAMIC_CLASS(wxPopupTransientWindow, wxPopupWindow)
#if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
IMPLEMENT_DYNAMIC_CLASS(wxPopupComboWindow, wxPopupTransientWindow)
#endif
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// event handlers which we use to intercept events which cause the popup to
// disappear
class wxPopupWindowHandler : public wxEvtHandler
{
public:
wxPopupWindowHandler(wxPopupTransientWindow *popup) { m_popup = popup; }
protected:
// event handlers
void OnLeftDown(wxMouseEvent& event);
private:
wxPopupTransientWindow *m_popup;
DECLARE_EVENT_TABLE()
};
class wxPopupFocusHandler : public wxEvtHandler
{
public:
wxPopupFocusHandler(wxPopupTransientWindow *popup)
{
m_popup = popup;
#ifdef __WXGTK__
// ignore the next few OnKillFocus() calls
m_creationTime = time(NULL);
#endif // __WXGTK__
}
protected:
// event handlers
void OnKillFocus(wxFocusEvent& event);
void OnKeyDown(wxKeyEvent& event);
private:
wxPopupTransientWindow *m_popup;
// hack around wxGTK bug: we always get several kill focus events
// immediately after creation!
#ifdef __WXGTK__
time_t m_creationTime;
#endif // __WXGTK__
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(wxPopupWindowHandler, wxEvtHandler)
EVT_LEFT_DOWN(wxPopupWindowHandler::OnLeftDown)
END_EVENT_TABLE()
BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
EVT_KILL_FOCUS(wxPopupFocusHandler::OnKillFocus)
EVT_KEY_DOWN(wxPopupFocusHandler::OnKeyDown)
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxPopupWindowBase
// ----------------------------------------------------------------------------
wxPopupWindowBase::~wxPopupWindowBase()
{
// this destructor is required for Darwin
}
bool wxPopupWindowBase::Create(wxWindow* WXUNUSED(parent), int WXUNUSED(flags))
{
return TRUE;
}
void wxPopupWindowBase::Position(const wxPoint& ptOrigin,
const wxSize& size)
{
wxSize sizeScreen = wxGetDisplaySize(),
sizeSelf = GetSize();
// is there enough space to put the popup below the window (where we put it
// by default)?
wxCoord y = ptOrigin.y + size.y;
if ( y + sizeSelf.y > sizeScreen.y )
{
// check if there is enough space above
if ( ptOrigin.y > sizeSelf.y )
{
// do position the control above the window
y -= size.y + sizeSelf.y;
}
//else: not enough space below nor above, leave below
}
// now check left/right too
wxCoord x = ptOrigin.x + size.x;
if ( x + sizeSelf.x > sizeScreen.x )
{
// check if there is enough space to the left
if ( ptOrigin.x > sizeSelf.x )
{
// do position the control to the left
x -= size.x + sizeSelf.x;
}
//else: not enough space there neither, leave in default position
}
Move(x, y, wxSIZE_NO_ADJUSTMENTS);
}
// ----------------------------------------------------------------------------
// wxPopupTransientWindow
// ----------------------------------------------------------------------------
void wxPopupTransientWindow::Init()
{
m_child =
m_focus = (wxWindow *)NULL;
m_handlerFocus = NULL;
m_handlerPopup = NULL;
}
wxPopupTransientWindow::wxPopupTransientWindow(wxWindow *parent, int style)
{
Init();
(void)Create(parent, style);
}
wxPopupTransientWindow::~wxPopupTransientWindow()
{
PopHandlers();
delete m_handlerFocus;
delete m_handlerPopup;
}
void wxPopupTransientWindow::PopHandlers()
{
if ( m_child )
{
if ( !m_child->RemoveEventHandler(m_handlerPopup) )
{
// something is very wrong and someone else probably deleted our
// handler - so don't risk deleting it second time
m_handlerPopup = NULL;
}
m_child->ReleaseMouse();
m_child = NULL;
}
if ( m_focus )
{
#ifndef __WXX11__
if ( !m_focus->RemoveEventHandler(m_handlerFocus) )
{
// see above
m_handlerFocus = NULL;
}
#endif
m_focus = NULL;
}
}
void wxPopupTransientWindow::Popup(wxWindow *winFocus)
{
const wxWindowList& children = GetChildren();
if ( children.GetCount() )
{
m_child = children.GetFirst()->GetData();
}
else
{
m_child = this;
}
// we can't capture mouse before the window is shown in wxGTK, so do it
// first
Show();
delete m_handlerPopup;
m_handlerPopup = new wxPopupWindowHandler(this);
m_child->CaptureMouse();
m_child->PushEventHandler(m_handlerPopup);
m_focus = winFocus ? winFocus : this;
m_focus->SetFocus();
#ifndef __WXX11__
#ifdef __WXMSW__
// MSW doesn't allow to set focus to the popup window, but we need to
// subclass the window which has the focus, and not winFocus passed in or
// otherwise everything else breaks down
m_focus = FindFocus();
if ( m_focus )
#endif // __WXMSW__
{
delete m_handlerFocus;
m_handlerFocus = new wxPopupFocusHandler(this);
m_focus->PushEventHandler(m_handlerFocus);
}
#endif // !__WXX11__
}
void wxPopupTransientWindow::Dismiss()
{
PopHandlers();
Hide();
}
void wxPopupTransientWindow::DismissAndNotify()
{
Dismiss();
OnDismiss();
}
void wxPopupTransientWindow::OnDismiss()
{
// nothing to do here - but it may be interesting for derived class
}
bool wxPopupTransientWindow::ProcessLeftDown(wxMouseEvent& WXUNUSED(event))
{
// no special processing here
return FALSE;
}
#if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
// ----------------------------------------------------------------------------
// wxPopupComboWindow
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(wxPopupComboWindow, wxPopupTransientWindow)
EVT_KEY_DOWN(wxPopupComboWindow::OnKeyDown)
END_EVENT_TABLE()
wxPopupComboWindow::wxPopupComboWindow(wxComboControl *parent)
: wxPopupTransientWindow(parent)
{
m_combo = parent;
}
bool wxPopupComboWindow::Create(wxComboControl *parent)
{
m_combo = parent;
return wxPopupWindow::Create(parent);
}
void wxPopupComboWindow::PositionNearCombo()
{
// the origin point must be in screen coords
wxPoint ptOrigin = m_combo->ClientToScreen(wxPoint(0, 0));
#if 0 //def __WXUNIVERSAL__
// account for the fact that (0, 0) is not the top left corner of the
// window: there is also the border
wxRect rectBorders = m_combo->GetRenderer()->
GetBorderDimensions(m_combo->GetBorder());
ptOrigin.x -= rectBorders.x;
ptOrigin.y -= rectBorders.y;
#endif // __WXUNIVERSAL__
// position below or above the combobox: the width is 0 to put it exactly
// below us, not to the left or to the right
Position(ptOrigin, wxSize(0, m_combo->GetSize().y));
}
void wxPopupComboWindow::OnDismiss()
{
m_combo->OnDismiss();
}
void wxPopupComboWindow::OnKeyDown(wxKeyEvent& event)
{
m_combo->ProcessEvent(event);
}
#endif // wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
// ----------------------------------------------------------------------------
// wxPopupWindowHandler
// ----------------------------------------------------------------------------
void wxPopupWindowHandler::OnLeftDown(wxMouseEvent& event)
{
// let the window have it first (we're the first event handler in the chain
// of handlers for this window)
if ( m_popup->ProcessLeftDown(event) )
{
return;
}
wxPoint pos = event.GetPosition();
// scrollbar on which the click occured
wxWindow *sbar = NULL;
wxWindow *win = (wxWindow *)event.GetEventObject();
switch ( win->HitTest(pos.x, pos.y) )
{
case wxHT_WINDOW_OUTSIDE:
{
// do the coords translation now as after DismissAndNotify()
// m_popup may be destroyed
wxMouseEvent event2(event);
m_popup->ClientToScreen(&event2.m_x, &event2.m_y);
// clicking outside a popup dismisses it
m_popup->DismissAndNotify();
// dismissing a tooltip shouldn't waste a click, i.e. you
// should be able to dismiss it and press the button with the
// same click, so repost this event to the window beneath us
wxWindow *win = wxFindWindowAtPoint(event2.GetPosition());
if ( win )
{
// translate the event coords to the ones of the window
// which is going to get the event
win->ScreenToClient(&event2.m_x, &event2.m_y);
event2.SetEventObject(win);
wxPostEvent(win, event2);
}
}
break;
#ifdef __WXUNIVERSAL__
case wxHT_WINDOW_HORZ_SCROLLBAR:
sbar = win->GetScrollbar(wxHORIZONTAL);
break;
case wxHT_WINDOW_VERT_SCROLLBAR:
sbar = win->GetScrollbar(wxVERTICAL);
break;
#endif
default:
// forgot to update the switch after adding a new hit test code?
wxFAIL_MSG( _T("unexpected HitTest() return value") );
// fall through
case wxHT_WINDOW_CORNER:
// don't actually know if this one is good for anything, but let it
// pass just in case
case wxHT_WINDOW_INSIDE:
// let the normal processing take place
event.Skip();
break;
}
if ( sbar )
{
// translate the event coordinates to the scrollbar ones
pos = sbar->ScreenToClient(win->ClientToScreen(pos));
// and give the event to it
wxMouseEvent event2 = event;
event2.m_x = pos.x;
event2.m_y = pos.y;
(void)sbar->GetEventHandler()->ProcessEvent(event2);
}
}
// ----------------------------------------------------------------------------
// wxPopupFocusHandler
// ----------------------------------------------------------------------------
void wxPopupFocusHandler::OnKillFocus(wxFocusEvent& event)
{
#ifdef __WXGTK__
// ignore the next OnKillFocus() call
if ( time(NULL) < m_creationTime + 1 )
{
event.Skip();
return;
}
#endif // __WXGTK__
// when we lose focus we always disappear - unless it goes to the popup (in
// which case we don't really lose it)
wxWindow *win = event.GetWindow();
while ( win )
{
if ( win == m_popup )
return;
win = win->GetParent();
}
m_popup->DismissAndNotify();
}
void wxPopupFocusHandler::OnKeyDown(wxKeyEvent& event)
{
// let the window have it first, it might process the keys
if ( !m_popup->ProcessEvent(event) )
{
// by default, dismiss the popup
m_popup->DismissAndNotify();
}
}
#endif // wxUSE_POPUPWIN