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///////////////////////////////////////////////////////////////////////////////
// Name: wx/private/tlwgeom.h
// Purpose: Declaration of platform-specific and private wxTLWGeometry.
// Author: Vadim Zeitlin
// Created: 2018-04-29
// Copyright: (c) 2018 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_PRIVATE_TLWGEOM_H_
#define _WX_PRIVATE_TLWGEOM_H_
#include "wx/display.h"
#include "wx/toplevel.h"
// ----------------------------------------------------------------------------
// wxTLWGeometryBase: abstract base class for platform-specific classes
// ----------------------------------------------------------------------------
// wxTLWGeometry contains full information about the window geometry, which may
// include things other than the obvious ones like its current position and
// size (e.g. under MSW it also stores the position of the maximized window,
// under GTK the size of non-client decorations etc). It is private to wx and
// is only used indirectly, via wxTopLevelWindow::SaveGeometry() and
// RestoreToGeometry() methods, in the public API.
class wxTLWGeometryBase
{
public:
typedef wxTopLevelWindow::GeometrySerializer Serializer;
wxTLWGeometryBase() {}
virtual ~wxTLWGeometryBase() {}
// Initialize from the given window.
virtual bool GetFrom(const wxTopLevelWindow* tlw) = 0;
// Resize the window to use this geometry.
virtual bool ApplyTo(wxTopLevelWindow* tlw) = 0;
// Serialize or deserialize the object by using the provided object for
// writing/reading the values of the different fields of this object.
virtual bool Save(const Serializer& ser) const = 0;
virtual bool Restore(Serializer& ser) = 0;
};
// ----------------------------------------------------------------------------
// wxTLWGeometryGeneric: simplest possible generic implementation
// ----------------------------------------------------------------------------
// names for various persistent options
#define wxPERSIST_TLW_X "x"
#define wxPERSIST_TLW_Y "y"
#define wxPERSIST_TLW_W "w"
#define wxPERSIST_TLW_H "h"
#define wxPERSIST_TLW_MAXIMIZED "Maximized"
#define wxPERSIST_TLW_ICONIZED "Iconized"
// MSW has its own native implementation and doesn't use this class.
#ifndef __WXMSW__
class wxTLWGeometryGeneric : public wxTLWGeometryBase
{
public:
wxTLWGeometryGeneric()
{
m_hasPos =
m_hasSize =
m_iconized =
m_maximized = false;
}
virtual bool Save(const Serializer& ser) const wxOVERRIDE
{
if ( !ser.SaveField(wxPERSIST_TLW_X, m_rectScreen.x) ||
!ser.SaveField(wxPERSIST_TLW_Y, m_rectScreen.y) )
return false;
if ( !ser.SaveField(wxPERSIST_TLW_W, m_rectScreen.width) ||
!ser.SaveField(wxPERSIST_TLW_H, m_rectScreen.height) )
return false;
if ( !ser.SaveField(wxPERSIST_TLW_MAXIMIZED, m_maximized) )
return false;
if ( !ser.SaveField(wxPERSIST_TLW_ICONIZED, m_iconized) )
return false;
return true;
}
virtual bool Restore(Serializer& ser) wxOVERRIDE
{
m_hasPos = ser.RestoreField(wxPERSIST_TLW_X, &m_rectScreen.x) &&
ser.RestoreField(wxPERSIST_TLW_Y, &m_rectScreen.y);
m_hasSize = ser.RestoreField(wxPERSIST_TLW_W, &m_rectScreen.width) &&
ser.RestoreField(wxPERSIST_TLW_H, &m_rectScreen.height);
int tmp;
if ( ser.RestoreField(wxPERSIST_TLW_MAXIMIZED, &tmp) )
m_maximized = tmp != 0;
if ( ser.RestoreField(wxPERSIST_TLW_ICONIZED, &tmp) )
m_iconized = tmp != 0;
// If we restored at least something, return true.
return m_hasPos || m_hasSize || m_maximized || m_iconized;
}
virtual bool GetFrom(const wxTopLevelWindow* tlw) wxOVERRIDE
{
m_rectScreen = tlw->GetScreenRect();
m_hasPos =
m_hasSize = true;
m_iconized = tlw->IsIconized();
m_maximized = tlw->IsMaximized();
return true;
}
virtual bool ApplyTo(wxTopLevelWindow* tlw) wxOVERRIDE
{
if ( m_hasPos )
{
// to avoid making the window completely invisible if it had been
// shown on a monitor which was disconnected since the last run
// (this is pretty common for notebook with external displays)
//
// NB: we should allow window position to be (slightly) off screen,
// it's not uncommon to position the window so that its upper
// left corner has slightly negative coordinate
if ( wxDisplay::GetFromPoint(m_rectScreen.GetTopLeft()) != wxNOT_FOUND ||
(m_hasSize &&
wxDisplay::GetFromPoint(m_rectScreen.GetBottomRight()) != wxNOT_FOUND) )
{
tlw->Move(m_rectScreen.GetTopLeft(), wxSIZE_ALLOW_MINUS_ONE);
}
//else: should we try to adjust position/size somehow?
}
if ( m_hasSize )
{
// a previous version of the program could have saved the window
// size which used to be big enough, but which is not big enough
// any more for the new version, so check that the size we restore
// doesn't cut off parts of the window
wxSize size = m_rectScreen.GetSize();
size.IncTo(tlw->GetBestSize());
tlw->SetSize(size);
}
// note that the window can be both maximized and iconized
if ( m_maximized )
tlw->Maximize();
if ( m_iconized )
tlw->Iconize();
return true;
}
private:
wxRect m_rectScreen;
bool m_hasPos;
bool m_hasSize;
bool m_iconized;
bool m_maximized;
};
#endif // !__WXMSW__
#ifdef __WXGTK20__
#include "wx/gtk/private/tlwgeom.h"
#elif defined(__WXMSW__)
#include "wx/msw/private/tlwgeom.h"
#else
class wxTLWGeometry : public wxTLWGeometryGeneric
{
};
#endif
#endif // _WX_PRIVATE_TLWGEOM_H_
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