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wxWidgets/src/msw/dialog.cpp
Vadim Zeitlin b6c588e1a6 wxDialog change (Show() completely rewritten, modal dialogs handling changed) 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5737 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-01-30 01:31:09 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: src/msw/dialog.cpp
// Purpose: wxDialog class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "dialog.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/dialog.h"
#include "wx/utils.h"
#include "wx/frame.h"
#include "wx/app.h"
#include "wx/settings.h"
#include "wx/intl.h"
#include "wx/log.h"
#endif
#include "wx/msw/private.h"
#include "wx/log.h"
#if wxUSE_COMMON_DIALOGS
#include <commdlg.h>
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// default dialog pos and size
#define wxDIALOG_DEFAULT_X 300
#define wxDIALOG_DEFAULT_Y 300
#define wxDIALOG_DEFAULT_WIDTH 500
#define wxDIALOG_DEFAULT_HEIGHT 500
// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------
// all objects to be deleted during next idle processing - from window.cpp
extern wxList WXDLLEXPORT wxPendingDelete;
// all frames and modeless dialogs - not static, used in frame.cpp, mdi.cpp &c
wxWindowList wxModelessWindows;
// all modal dialogs currently shown
static wxWindowList wxModalDialogs;
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxPanel)
BEGIN_EVENT_TABLE(wxDialog, wxPanel)
EVT_BUTTON(wxID_OK, wxDialog::OnOK)
EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
EVT_CHAR_HOOK(wxDialog::OnCharHook)
EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
EVT_CLOSE(wxDialog::OnCloseWindow)
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxDialog construction
// ----------------------------------------------------------------------------
wxDialog::wxDialog()
{
m_isShown = FALSE;
SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
}
bool wxDialog::Create(wxWindow *parent, wxWindowID id,
const wxString& title,
const wxPoint& pos,
const wxSize& size,
long style,
const wxString& name)
{
SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
SetName(name);
if (!parent)
wxTopLevelWindows.Append(this);
// windowFont = wxTheFontList->FindOrCreateFont(11, wxSWISS, wxNORMAL, wxNORMAL);
if (parent) parent->AddChild(this);
if ( id == -1 )
m_windowId = (int)NewControlId();
else
m_windowId = id;
int x = pos.x;
int y = pos.y;
int width = size.x;
int height = size.y;
if (x < 0)
x = wxDIALOG_DEFAULT_X;
if (y < 0)
y = wxDIALOG_DEFAULT_Y;
m_windowStyle = style;
m_isShown = FALSE;
if (width < 0)
width = wxDIALOG_DEFAULT_WIDTH;
if (height < 0)
height = wxDIALOG_DEFAULT_HEIGHT;
// All dialogs should really have this style
m_windowStyle |= wxTAB_TRAVERSAL;
WXDWORD extendedStyle = MakeExtendedStyle(m_windowStyle);
if (m_windowStyle & wxSTAY_ON_TOP)
extendedStyle |= WS_EX_TOPMOST;
// Allows creation of dialogs with & without captions under MSWindows,
// resizeable or not (but a resizeable dialog always has caption -
// otherwise it would look too strange)
const wxChar *dlg;
if ( style & wxRESIZE_BORDER )
dlg = wxT("wxResizeableDialog");
else if ( style & wxCAPTION )
dlg = wxT("wxCaptionDialog");
else
dlg = wxT("wxNoCaptionDialog");
MSWCreate(m_windowId, parent, NULL, this, NULL,
x, y, width, height,
0, // style is not used if we have dlg template
dlg,
extendedStyle);
HWND hwnd = (HWND)GetHWND();
if ( !hwnd )
{
wxLogError(_("Failed to create dialog."));
return FALSE;
}
SubclassWin(GetHWND());
SetWindowText(hwnd, title);
SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
return TRUE;
}
void wxDialog::SetModal(bool flag)
{
if ( flag )
{
m_windowStyle |= wxDIALOG_MODAL;
wxModelessWindows.DeleteObject(this);
}
else
{
m_windowStyle &= ~wxDIALOG_MODAL;
wxModelessWindows.Append(this);
}
}
wxDialog::~wxDialog()
{
m_isBeingDeleted = TRUE;
wxTopLevelWindows.DeleteObject(this);
Show(FALSE);
// VZ: this is bogus and breaks focus handling - it won't be returned to
// the window which had it previosuly if we do this
#if 0
if (m_modalShowing)
{
// For some reason, wxWindows can activate another task altogether
// when a frame is destroyed after a modal dialog has been invoked.
// Try to bring the parent to the top.
// dfgg: I moved this following line from end of function -
// must not call if another window is on top!!
// This can often happen with Close() and delayed deleting
if (GetParent() && GetParent()->GetHWND())
::BringWindowToTop((HWND) GetParent()->GetHWND());
}
m_modalShowing = FALSE;
#endif // 0
if ( !IsModal() )
wxModelessWindows.DeleteObject(this);
// If this is the last top-level window, exit.
if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
{
wxTheApp->SetTopWindow(NULL);
if ( wxTheApp->GetExitOnFrameDelete() )
{
::PostQuitMessage(0);
}
}
}
// ----------------------------------------------------------------------------
// kbd handling
// ----------------------------------------------------------------------------
// By default, pressing escape cancels the dialog
void wxDialog::OnCharHook(wxKeyEvent& event)
{
if (GetHWND())
{
if (event.m_keyCode == WXK_ESCAPE)
{
// Behaviour changed in 2.0: we'll send a Cancel message
// to the dialog instead of Close.
wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
cancelEvent.SetEventObject( this );
GetEventHandler()->ProcessEvent(cancelEvent);
// ensure that there is another message for this window so the
// ShowModal loop will exit and won't get stuck in GetMessage().
::PostMessage(GetHwnd(), WM_NULL, 0, 0);
return;
}
}
// We didn't process this event.
event.Skip();
}
// ----------------------------------------------------------------------------
// Windows dialog boxes can't be iconized
// ----------------------------------------------------------------------------
void wxDialog::Iconize(bool WXUNUSED(iconize))
{
}
bool wxDialog::IsIconized() const
{
return FALSE;
}
// ----------------------------------------------------------------------------
// size/position handling
// ----------------------------------------------------------------------------
void wxDialog::DoSetClientSize(int width, int height)
{
HWND hWnd = (HWND) GetHWND();
RECT rect;
::GetClientRect(hWnd, &rect);
RECT rect2;
GetWindowRect(hWnd, &rect2);
// Find the difference between the entire window (title bar and all)
// and the client area; add this to the new client size to move the
// window
int actual_width = rect2.right - rect2.left - rect.right + width;
int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
MoveWindow(hWnd, rect2.left, rect2.top, actual_width, actual_height, TRUE);
wxSizeEvent event(wxSize(actual_width, actual_height), m_windowId);
event.SetEventObject( this );
GetEventHandler()->ProcessEvent(event);
}
void wxDialog::DoGetPosition(int *x, int *y) const
{
RECT rect;
GetWindowRect(GetHwnd(), &rect);
if ( x )
*x = rect.left;
if ( y )
*y = rect.top;
}
// ----------------------------------------------------------------------------
// showing the dialogs
// ----------------------------------------------------------------------------
bool wxDialog::IsModal() const
{
return (GetWindowStyleFlag() & wxDIALOG_MODAL) != 0;
}
// VZ: this is the old version unchanged (reindented only), it will be removed
// as soon as we're sure the new one works correctly
#if 0
bool wxDialog::Show(bool show)
{
m_isShown = show;
if (show)
InitDialog();
bool modal = IsModal();
if (modal)
{
if (show)
{
// find the top level window which had focus before - we will restore
// focus to it later
m_hwndOldFocus = 0;
for ( HWND hwnd = ::GetFocus(); hwnd; hwnd = ::GetParent(hwnd) )
{
m_hwndOldFocus = (WXHWND)hwnd;
}
if (m_modalShowing)
{
BringWindowToTop((HWND) GetHWND());
return TRUE;
}
m_modalShowing = TRUE;
wxNode *node = wxModalDialogs.First();
while (node)
{
wxDialog *box = (wxDialog *)node->Data();
if (box != this)
::EnableWindow((HWND) box->GetHWND(), FALSE);
node = node->Next();
}
// if we don't do it, some window might be deleted while we have pointers
// to them in our disabledWindows list and the program will crash when it
// will try to reenable them after the modal dialog end
wxTheApp->DeletePendingObjects();
wxList disabledWindows;
node = wxModelessWindows.First();
while (node)
{
wxWindow *win = (wxWindow *)node->Data();
if (::IsWindowEnabled((HWND) win->GetHWND()))
{
::EnableWindow((HWND) win->GetHWND(), FALSE);
disabledWindows.Append(win);
}
node = node->Next();
}
ShowWindow((HWND) GetHWND(), SW_SHOW);
EnableWindow((HWND) GetHWND(), TRUE);
BringWindowToTop((HWND) GetHWND());
if ( !wxModalDialogs.Find(this) )
wxModalDialogs.Append(this);
MSG msg;
// Must test whether this dialog still exists: we may not process
// a message before the deletion.
while (wxModalDialogs.Find(this) && m_modalShowing && GetMessage(&msg, NULL, 0, 0))
{
if ( m_acceleratorTable.Ok() &&
::TranslateAccelerator((HWND)GetHWND(),
(HACCEL)m_acceleratorTable.GetHACCEL(),
&msg) )
{
// Have processed the message
}
else if ( !wxTheApp->ProcessMessage((WXMSG *)&msg) )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
// If we get crashes (as per George Tasker's message) with nested modal dialogs,
// we should try removing the m_modalShowing test
if (m_modalShowing && !::PeekMessage(&msg, 0, 0, 0, PM_NOREMOVE))
// dfgg: NB MUST test m_modalShowing again as the message loop could have triggered
// a Show(FALSE) in the mean time!!!
// Without the test, we might delete the dialog before the end of modal showing.
{
while (wxTheApp->ProcessIdle() && m_modalShowing)
{
// Keep going until we decide we've done enough
}
}
}
// dfgg: now must specifically re-enable all other app windows that we disabled earlier
node=disabledWindows.First();
while(node) {
wxWindow* win = (wxWindow*) node->Data();
if (wxModalDialogs.Find(win) || wxModelessWindows.Find(win))
{
HWND hWnd = (HWND) win->GetHWND();
if (::IsWindow(hWnd))
::EnableWindow(hWnd,TRUE);
}
node=node->Next();
}
}
else // !show
{
::SetFocus((HWND)m_hwndOldFocus);
wxModalDialogs.DeleteObject(this);
wxNode *last = wxModalDialogs.Last();
// If there's still a modal dialog active, we
// enable it, else we enable all modeless windows
if (last)
{
// VZ: I don't understand what this is supposed to do, so I'll leave
// it out for now and look for horrible consequences
wxDialog *box = (wxDialog *)last->Data();
HWND hwnd = (HWND) box->GetHWND();
#if 0
if (box->IsUserEnabled())
#endif // 0
EnableWindow(hwnd, TRUE);
BringWindowToTop(hwnd);
}
else
{
wxNode *node = wxModelessWindows.First();
while (node)
{
wxWindow *win = (wxWindow *)node->Data();
HWND hwnd = (HWND) win->GetHWND();
// Only enable again if not user-disabled.
#if 0
if (win->IsUserEnabled())
#endif // 0
EnableWindow(hwnd, TRUE);
node = node->Next();
}
}
// Try to highlight the correct window (the parent)
HWND hWndParent = 0;
if (GetParent())
{
hWndParent = (HWND) GetParent()->GetHWND();
if (hWndParent)
::BringWindowToTop(hWndParent);
}
ShowWindow((HWND) GetHWND(), SW_HIDE);
m_modalShowing = FALSE;
}
}
else // !modal
{
if (show)
{
ShowWindow((HWND) GetHWND(), SW_SHOW);
BringWindowToTop((HWND) GetHWND());
}
else
{
// Try to highlight the correct window (the parent)
HWND hWndParent = 0;
if (GetParent())
{
hWndParent = (HWND) GetParent()->GetHWND();
if (hWndParent)
::BringWindowToTop(hWndParent);
}
if ( m_hWnd )
ShowWindow((HWND) GetHWND(), SW_HIDE);
}
}
return TRUE;
}
#else // 1
bool wxDialog::IsModalShowing() const
{
return wxModalDialogs.Find((wxDialog *)this) != NULL; // const_cast
}
void wxDialog::DoShowModal()
{
wxCHECK_RET( !IsModalShowing(), _T("DoShowModal() called twice") );
wxModalDialogs.Append(this);
wxWindow *parent = GetParent();
// remember where the focus was
wxWindow *winFocus = FindFocus();
if ( !winFocus )
{
winFocus = parent;
}
if ( !winFocus )
{
winFocus = wxTheApp->GetTopWindow();
}
// disable the parent window first
HWND hwndParent = parent ? GetHwndOf(parent) : (HWND)NULL;
if ( hwndParent )
{
::EnableWindow(hwndParent, FALSE);
}
// enter the modal loop
while ( IsModalShowing() )
{
#if wxUSE_THREADS
wxMutexGuiLeaveOrEnter();
#endif // wxUSE_THREADS
while ( !wxTheApp->Pending() && wxTheApp->ProcessIdle() )
;
// a message came or no more idle processing to do
wxTheApp->DoMessage();
}
// reenable the parent window if any
if ( hwndParent )
{
::EnableWindow(hwndParent, TRUE);
}
// and restore focus
if ( winFocus )
{
winFocus->SetFocus();
}
}
bool wxDialog::Show(bool show)
{
if ( !wxDialogBase::Show(show) )
{
// nothing to do
return FALSE;
}
if ( show )
{
// usually will result in TransferDataToWindow() being called
InitDialog();
}
if ( IsModal() )
{
if ( show )
{
DoShowModal();
}
else // end of modal dialog
{
// this will cause IsModalShowing() return FALSE and our local
// message loop will terminate
wxModalDialogs.DeleteObject(this);
}
}
return TRUE;
}
#endif // 0/1
// Replacement for Show(TRUE) for modal dialogs - returns return code
int wxDialog::ShowModal()
{
m_windowStyle |= wxDIALOG_MODAL;
Show(TRUE);
return GetReturnCode();
}
// NB: this function (surprizingly) may be called for both modal and modeless
// dialogs and should work for both of them
void wxDialog::EndModal(int retCode)
{
SetReturnCode(retCode);
Show(FALSE);
}
// ----------------------------------------------------------------------------
// wxWin event handlers
// ----------------------------------------------------------------------------
// Standard buttons
void wxDialog::OnOK(wxCommandEvent& event)
{
if ( Validate() && TransferDataFromWindow() )
{
EndModal(wxID_OK);
}
}
void wxDialog::OnApply(wxCommandEvent& event)
{
if ( Validate() )
TransferDataFromWindow();
// TODO probably need to disable the Apply button until things change again
}
void wxDialog::OnCancel(wxCommandEvent& event)
{
EndModal(wxID_CANCEL);
}
void wxDialog::OnCloseWindow(wxCloseEvent& event)
{
// We'll send a Cancel message by default, which may close the dialog.
// Check for looping if the Cancel event handler calls Close().
// Note that if a cancel button and handler aren't present in the dialog,
// nothing will happen when you close the dialog via the window manager, or
// via Close(). We wouldn't want to destroy the dialog by default, since
// the dialog may have been created on the stack. However, this does mean
// that calling dialog->Close() won't delete the dialog unless the handler
// for wxID_CANCEL does so. So use Destroy() if you want to be sure to
// destroy the dialog. The default OnCancel (above) simply ends a modal
// dialog, and hides a modeless dialog.
// VZ: this is horrible and MT-unsafe. Can't we reuse some of these global
// lists here? don't dare to change it now, but should be done later!
static wxList closing;
if ( closing.Member(this) )
return;
closing.Append(this);
wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
cancelEvent.SetEventObject( this );
GetEventHandler()->ProcessEvent(cancelEvent); // This may close the dialog
closing.DeleteObject(this);
}
// Destroy the window (delayed, if a managed window)
bool wxDialog::Destroy()
{
wxCHECK_MSG( !wxPendingDelete.Member(this), FALSE,
_T("wxDialog destroyed twice") );
wxPendingDelete.Append(this);
return TRUE;
}
void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& event)
{
#if wxUSE_CTL3D
Ctl3dColorChange();
#else
SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
Refresh();
#endif
}
// ---------------------------------------------------------------------------
// dialog window proc
// ---------------------------------------------------------------------------
long wxDialog::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
{
long rc = 0;
bool processed = FALSE;
switch ( message )
{
case WM_CLOSE:
// if we can't close, tell the system that we processed the
// message - otherwise it would close us
processed = !Close();
break;
}
if ( !processed )
rc = wxWindow::MSWWindowProc(message, wParam, lParam);
return rc;
}
#if wxUSE_CTL3D
// Define for each class of dialog and control
WXHBRUSH wxDialog::OnCtlColor(WXHDC WXUNUSED(pDC),
WXHWND WXUNUSED(pWnd),
WXUINT WXUNUSED(nCtlColor),
WXUINT message,
WXWPARAM wParam,
WXLPARAM lParam)
{
return (WXHBRUSH)Ctl3dCtlColorEx(message, wParam, lParam);
}
#endif // wxUSE_CTL3D
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