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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/private/tlwgeom.h
// Purpose: wxMSW-specific wxTLWGeometry class.
// Author: Vadim Zeitlin
// Created: 2018-04-29
// Copyright: (c) 2018 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_PRIVATE_TLWGEOM_H_
#define _WX_MSW_PRIVATE_TLWGEOM_H_
#include "wx/log.h"
#include "wx/msw/private.h"
// names for MSW-specific options
#define wxPERSIST_TLW_MAX_X "xmax"
#define wxPERSIST_TLW_MAX_Y "ymax"
class wxTLWGeometry : public wxTLWGeometryBase
{
public:
wxTLWGeometry()
{
wxZeroMemory(m_placement);
m_placement.length = sizeof(m_placement);
}
virtual bool Save(const Serializer& ser) const wxOVERRIDE
{
// For compatibility with the existing saved positions/sizes, use the
// same keys as the generic version (which was previously used under
// MSW too).
// Normal position and size.
const RECT& rc = m_placement.rcNormalPosition;
if ( !ser.SaveField(wxPERSIST_TLW_X, rc.left) ||
!ser.SaveField(wxPERSIST_TLW_Y, rc.top) )
return false;
if ( !ser.SaveField(wxPERSIST_TLW_W, rc.right - rc.left) ||
!ser.SaveField(wxPERSIST_TLW_H, rc.bottom - rc.top) )
return false;
// Maximized/minimized state.
UINT show = m_placement.showCmd;
if ( !ser.SaveField(wxPERSIST_TLW_MAXIMIZED, show == SW_SHOWMAXIMIZED) )
return false;
if ( !ser.SaveField(wxPERSIST_TLW_ICONIZED, show == SW_SHOWMINIMIZED) )
return false;
// Maximized window position.
const POINT pt = m_placement.ptMaxPosition;
if ( !ser.SaveField(wxPERSIST_TLW_MAX_X, pt.x) ||
!ser.SaveField(wxPERSIST_TLW_MAX_Y, pt.y) )
return false;
// We don't currently save the minimized window position, it doesn't
// seem useful for anything and is probably just a left over from
// Windows 3.1 days, when icons were positioned on the desktop instead
// of being located in the taskbar.
return true;
}
virtual bool Restore(Serializer& ser) wxOVERRIDE
{
// Normal position and size.
wxRect r;
if ( !ser.RestoreField(wxPERSIST_TLW_X, &r.x) ||
!ser.RestoreField(wxPERSIST_TLW_Y, &r.y) ||
!ser.RestoreField(wxPERSIST_TLW_W, &r.width) ||
!ser.RestoreField(wxPERSIST_TLW_H, &r.height) )
return false;
wxCopyRectToRECT(r, m_placement.rcNormalPosition);
// Maximized/minimized state.
//
// Note the special case of SW_MINIMIZE: while GetWindowPlacement()
// returns SW_SHOWMINIMIZED when the window is iconized, we restore it
// as SW_MINIMIZE as this is what the code in wxTLW checks to determine
// whether the window is supposed to be iconized or not.
//
// Just to confuse matters further, note that SW_MAXIMIZE is exactly
// the same thing as SW_SHOWMAXIMIZED.
int tmp;
UINT& show = m_placement.showCmd;
if ( ser.RestoreField(wxPERSIST_TLW_MAXIMIZED, &tmp) && tmp )
show = SW_MAXIMIZE;
else if ( ser.RestoreField(wxPERSIST_TLW_ICONIZED, &tmp) && tmp )
show = SW_MINIMIZE;
else
show = SW_SHOWNORMAL;
// Maximized window position.
if ( ser.RestoreField(wxPERSIST_TLW_MAX_X, &r.x) &&
ser.RestoreField(wxPERSIST_TLW_MAX_Y, &r.y) )
{
m_placement.ptMaxPosition.x = r.x;
m_placement.ptMaxPosition.y = r.y;
}
return true;
}
virtual bool GetFrom(const wxTopLevelWindow* tlw) wxOVERRIDE
{
if ( !::GetWindowPlacement(GetHwndOf(tlw), &m_placement) )
{
wxLogLastError(wxS("GetWindowPlacement"));
return false;
}
return true;
}
virtual bool ApplyTo(wxTopLevelWindow* tlw) wxOVERRIDE
{
// There is a subtlety here: if the window is currently hidden,
// restoring its geometry shouldn't show it, so we must use SW_HIDE as
// show command, but showing it later should restore it to the correct
// state, so we need to remember it in wxTLW itself. And even if it's
// currently shown, we still need to update its show command, so that
// it matches the real window state after SetWindowPlacement() call.
tlw->MSWSetShowCommand(m_placement.showCmd);
if ( !tlw->IsShown() )
{
m_placement.showCmd = SW_HIDE;
}
const wxSize oldDPI = tlw->GetDPI();
if ( !::SetWindowPlacement(GetHwndOf(tlw), &m_placement) )
{
wxLogLastError(wxS("SetWindowPlacement"));
return false;
}
// Check if a window DPI hasn't changed, as the result of being placed
// on a monitor with a different DPI from the main one because in this
// case its size is not restored properly.
const wxSize newDPI = tlw->GetDPI();
if ( oldDPI != newDPI )
{
// So try setting the placement again as now it will use the
// correct scaling factor, because the window is already on the
// correct monitor.
if ( !::SetWindowPlacement(GetHwndOf(tlw), &m_placement) )
{
wxLogLastError(wxS("SetWindowPlacement (2nd time)"));
return false;
}
}
return true;
}
private:
WINDOWPLACEMENT m_placement;
};
#endif // _WX_MSW_PRIVATE_TLWGEOM_H_
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