///////////////////////////////////////////////////////////////////////////////
// Name:        tests/sizers/wrapsizer.cpp
// Purpose:     Unit tests for wxWrapSizer
// Author:      Catalin Raceanu
// Created:     2010-10-23
// Copyright:   (c) 2010 wxWidgets development team
///////////////////////////////////////////////////////////////////////////////

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#include "testprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/app.h"
#endif // WX_PRECOMP

#include "wx/wrapsizer.h"

#include "asserthelper.h"

TEST_CASE("wxWrapSizer::CalcMin", "[wxWrapSizer]")
{
    wxScopedPtr<wxWindow> win(new wxWindow(wxTheApp->GetTopWindow(), wxID_ANY));
    win->SetClientSize(180, 240);

    wxSizer *sizer = new wxWrapSizer(wxHORIZONTAL);
    win->SetSizer(sizer);

    wxSize sizeMinExpected;

    // With a single child the min size must be the same as child size.
    const wxSize sizeChild1 = wxSize(80, 60);
    sizeMinExpected = sizeChild1;

    wxWindow * const
        child1 = new wxWindow(win.get(), wxID_ANY, wxDefaultPosition, sizeChild1);
    child1->SetBackgroundColour(*wxRED);
    sizer->Add(child1);
    win->Layout();

    CHECK( sizeMinExpected == sizer->CalcMin() );

    // If both children can fit in the same row, the minimal size of the sizer
    // is determined by the sum of their minimal horizontal dimensions and
    // the maximum of their minimal vertical dimensions.
    const wxSize sizeChild2 = wxSize(100, 80);
    sizeMinExpected.x += sizeChild2.x;
    sizeMinExpected.y = wxMax(sizeChild1.y, sizeChild2.y);

    wxWindow * const
        child2 = new wxWindow(win.get(), wxID_ANY, wxDefaultPosition, sizeChild2);
    child2->SetBackgroundColour(*wxYELLOW);
    sizer->Add(child2);
    win->Layout();

    CHECK( sizeMinExpected == sizer->CalcMin() );

    // Three children will take at least two rows so the minimal size in
    // vertical direction must increase.
    const wxSize sizeChild3 = wxSize(90, 40);
    sizeMinExpected.y += sizeChild3.y;

    wxWindow * const
        child3 = new wxWindow(win.get(), wxID_ANY, wxDefaultPosition, sizeChild3);
    child3->SetBackgroundColour(*wxGREEN);
    sizer->Add(child3);
    win->Layout();

    CHECK( sizeMinExpected == sizer->CalcMin() );
}