/////////////////////////////////////////////////////////////////////////////
// Name:        shaped.cpp
// Purpose:     Shaped Window sample
// Author:      Robin Dunn
// Modified by:
// Created:     28-Mar-2003
// RCS-ID:      $Id$
// Copyright:   (c) Robin Dunn
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

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

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// for all others, include the necessary headers
#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/log.h"
    #include "wx/frame.h"
    #include "wx/panel.h"
    #include "wx/stattext.h"
    #include "wx/menu.h"
    #include "wx/layout.h"
    #include "wx/msgdlg.h"
    #include "wx/image.h"
#endif

#include "wx/dcclient.h"
#include "wx/image.h"

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// menu ids
enum
{
    Show_Shaped = 100,
    Show_Transparent,

    // must be consecutive and in the same order as wxShowEffect enum elements
    Show_Effect_First,
    Show_Effect_Roll = Show_Effect_First,
    Show_Effect_Slide,
    Show_Effect_Blend,
    Show_Effect_Expand,
    Show_Effect_Last = Show_Effect_Expand
};

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// Define a new application type, each program should derive a class from wxApp
class MyApp : public wxApp
{
public:
    // override base class virtuals
    // ----------------------------

    // this one is called on application startup and is a good place for the app
    // initialization (doing it here and not in the ctor allows to have an error
    // return: if OnInit() returns false, the application terminates)
    virtual bool OnInit();
};


// Main frame just contains the menu items invoking the other tests
class MainFrame : public wxFrame
{
public:
    MainFrame();

private:
    void OnShowShaped(wxCommandEvent& event);
    void OnShowTransparent(wxCommandEvent& event);
    void OnShowEffect(wxCommandEvent& event);

    DECLARE_EVENT_TABLE()
};

// Define a new frame type: this is going to the frame showing the
// effect of wxFRAME_SHAPED
class ShapedFrame : public wxFrame
{
public:
    // ctor(s)
    ShapedFrame(wxFrame *parent);
    void SetWindowShape();

    // event handlers (these functions should _not_ be virtual)
    void OnDoubleClick(wxMouseEvent& evt);
    void OnLeftDown(wxMouseEvent& evt);
    void OnLeftUp(wxMouseEvent& evt);
    void OnMouseMove(wxMouseEvent& evt);
    void OnExit(wxMouseEvent& evt);
    void OnPaint(wxPaintEvent& evt);
    void OnWindowCreate(wxWindowCreateEvent& evt);

private:
    bool     m_hasShape;
    wxBitmap m_bmp;
    wxPoint  m_delta;

    // any class wishing to process wxWidgets events must use this macro
    DECLARE_EVENT_TABLE()
};

// Define a new frame type: this is going to the frame showing the
// effect of wxWindow::SetTransparent and of
// wxWindow::SetBackgroundStyle(wxBG_STYLE_TRANSPARENT)
class SeeThroughFrame : public wxFrame
{
public:
    // ctor(s)
    SeeThroughFrame();

    // event handlers (these functions should _not_ be virtual)
    void OnDoubleClick(wxMouseEvent& evt);
    void OnPaint(wxPaintEvent& evt);

private:
    enum State
    {
        STATE_SEETHROUGH,
        STATE_TRANSPARENT,
        STATE_OPAQUE,
        STATE_MAX
    };

    State m_currentState;

    // any class wishing to process wxWidgets events must use this macro
    DECLARE_EVENT_TABLE()
};

class EffectFrame : public wxFrame
{
public:
    EffectFrame(wxWindow *parent,
                wxShowEffect effect,
                // TODO: add menu command to the main frame to allow changing
                //       these parameters
                unsigned timeout = 1000,
                wxDirection dir = wxBOTTOM)
        : wxFrame(parent, wxID_ANY,
                  wxString::Format("Frame shown with %s effect",
                                   GetEffectName(effect)),
                  wxDefaultPosition, wxSize(450, 300)),
          m_effect(effect),
          m_timeout(timeout),
          m_dir(dir)
    {
        new wxStaticText(this, wxID_ANY,
                         wxString::Format("Effect: %s", GetEffectName(effect)),
                         wxPoint(20, 20));
        new wxStaticText(this, wxID_ANY,
                         wxString::Format("Timeout: %ums", m_timeout),
                         wxPoint(20, 60));

        ShowWithEffect(m_effect, m_timeout, m_dir);

        Connect(wxEVT_CLOSE_WINDOW, wxCloseEventHandler(EffectFrame::OnClose));
    }

private:
    static const char *GetEffectName(wxShowEffect effect)
    {
        static const char *names[] =
        {
            "roll", "slide", "fade", "expand",
        };
        wxCOMPILE_TIME_ASSERT( WXSIZEOF(names) == wxSHOW_EFFECT_MAX,
                                EffectNamesMismatch );

        return names[effect];
    }

    void OnClose(wxCloseEvent& event)
    {
        HideWithEffect(m_effect, m_timeout, m_dir);

        event.Skip();
    }

    wxShowEffect m_effect;
    unsigned m_timeout;
    wxDirection m_dir;
};

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------

IMPLEMENT_APP(MyApp)

// `Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit()
{
    if ( !wxApp::OnInit() )
        return false;

    wxInitAllImageHandlers();

    new MainFrame;

    // success: wxApp::OnRun() will be called which will enter the main message
    // loop and the application will run. If we returned false here, the
    // application would exit immediately.
    return true;
}

// ----------------------------------------------------------------------------
// main frame
// ----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(MainFrame, wxFrame)
    EVT_MENU(Show_Shaped, MainFrame::OnShowShaped)
    EVT_MENU(Show_Transparent, MainFrame::OnShowTransparent)
    EVT_MENU_RANGE(Show_Effect_First, Show_Effect_Last, MainFrame::OnShowEffect)
END_EVENT_TABLE()

MainFrame::MainFrame()
         : wxFrame(NULL, wxID_ANY, "wxWidgets Shaped Sample",
                   wxDefaultPosition, wxSize(200, 100))
{
    wxMenuBar * const mbar = new wxMenuBar;
    wxMenu * const menuFrames = new wxMenu;
    menuFrames->Append(Show_Shaped, "Show &shaped window\tCtrl-S");
    menuFrames->Append(Show_Transparent, "Show &transparent window\tCtrl-T");
    menuFrames->AppendSeparator();
    menuFrames->Append(Show_Effect_Roll, "Show &rolled effect\tCtrl-R");
    menuFrames->Append(Show_Effect_Slide, "Show s&lide effect\tCtrl-L");
    menuFrames->Append(Show_Effect_Blend, "Show &fade effect\tCtrl-F");
    menuFrames->Append(Show_Effect_Expand, "Show &expand effect\tCtrl-E");
    menuFrames->AppendSeparator();
    menuFrames->Append(wxID_EXIT, "E&xit");

    mbar->Append(menuFrames, "&Show");
    SetMenuBar(mbar);

    Show();
}

void MainFrame::OnShowShaped(wxCommandEvent& WXUNUSED(event))
{
    ShapedFrame *shapedFrame = new ShapedFrame(this);
    shapedFrame->Show(true);
}

void MainFrame::OnShowTransparent(wxCommandEvent& WXUNUSED(event))
{
    SeeThroughFrame *seeThroughFrame = new SeeThroughFrame();
    seeThroughFrame->Show(true);
}

void MainFrame::OnShowEffect(wxCommandEvent& event)
{
    int effect = wxSHOW_EFFECT_ROLL + event.GetId() - Show_Effect_Roll;
    static wxDirection direction = wxLEFT;
    direction = (wxDirection)(((int)direction)<< 1);
    if ( direction > wxDOWN )
        direction = wxLEFT ;
    new EffectFrame(this, wx_static_cast(wxShowEffect, effect),1000,direction);
}

// ----------------------------------------------------------------------------
// shaped frame
// ----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(ShapedFrame, wxFrame)
    EVT_LEFT_DCLICK(ShapedFrame::OnDoubleClick)
    EVT_LEFT_DOWN(ShapedFrame::OnLeftDown)
    EVT_LEFT_UP(ShapedFrame::OnLeftUp)
    EVT_MOTION(ShapedFrame::OnMouseMove)
    EVT_RIGHT_UP(ShapedFrame::OnExit)

    EVT_PAINT(ShapedFrame::OnPaint)

#ifdef __WXGTK__
    EVT_WINDOW_CREATE(ShapedFrame::OnWindowCreate)
#endif
END_EVENT_TABLE()


// frame constructor
ShapedFrame::ShapedFrame(wxFrame *parent)
       : wxFrame(parent, wxID_ANY, wxEmptyString,
                  wxDefaultPosition, wxSize(100, 100),
                  0
                  | wxFRAME_SHAPED
                  | wxSIMPLE_BORDER
                  | wxFRAME_NO_TASKBAR
                  | wxSTAY_ON_TOP
            )
{
    m_hasShape = false;
    m_bmp = wxBitmap(_T("star.png"), wxBITMAP_TYPE_PNG);
    SetSize(wxSize(m_bmp.GetWidth(), m_bmp.GetHeight()));
    SetToolTip(wxT("Right-click to close"));

#ifndef __WXGTK__
    // On wxGTK we can't do this yet because the window hasn't been created
    // yet so we wait until the EVT_WINDOW_CREATE event happens.  On wxMSW and
    // wxMac the window has been created at this point so we go ahead and set
    // the shape now.
    SetWindowShape();
#endif
}

void ShapedFrame::SetWindowShape()
{
    wxRegion region(m_bmp, *wxWHITE);
    m_hasShape = SetShape(region);
}

void ShapedFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt))
{
    if (m_hasShape)
    {
        wxRegion region;
        SetShape(region);
        m_hasShape = false;
    }
    else
        SetWindowShape();
}

void ShapedFrame::OnLeftDown(wxMouseEvent& evt)
{
    CaptureMouse();
    wxPoint pos = ClientToScreen(evt.GetPosition());
    wxPoint origin = GetPosition();
    int dx =  pos.x - origin.x;
    int dy = pos.y - origin.y;
    m_delta = wxPoint(dx, dy);
}

void ShapedFrame::OnLeftUp(wxMouseEvent& WXUNUSED(evt))
{
    if (HasCapture())
    {
        ReleaseMouse();
    }
}

void ShapedFrame::OnMouseMove(wxMouseEvent& evt)
{
    wxPoint pt = evt.GetPosition();
    if (evt.Dragging() && evt.LeftIsDown())
    {
        wxPoint pos = ClientToScreen(pt);
        Move(wxPoint(pos.x - m_delta.x, pos.y - m_delta.y));
    }
}

void ShapedFrame::OnExit(wxMouseEvent& WXUNUSED(evt))
{
    Close();
}

void ShapedFrame::OnPaint(wxPaintEvent& WXUNUSED(evt))
{
    wxPaintDC dc(this);
    dc.DrawBitmap(m_bmp, 0, 0, true);
}

void ShapedFrame::OnWindowCreate(wxWindowCreateEvent& WXUNUSED(evt))
{
    SetWindowShape();
}

// ----------------------------------------------------------------------------
// see-through frame
// ----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(SeeThroughFrame, wxFrame)
    EVT_LEFT_DCLICK(SeeThroughFrame::OnDoubleClick)
    EVT_PAINT(SeeThroughFrame::OnPaint)
END_EVENT_TABLE()

SeeThroughFrame::SeeThroughFrame()
       : wxFrame(NULL, wxID_ANY, "Transparency test: double click here",
                  wxPoint(100, 30), wxSize(300, 300),
                  wxDEFAULT_FRAME_STYLE |
                  wxFULL_REPAINT_ON_RESIZE |
                  wxSTAY_ON_TOP),
         m_currentState(STATE_SEETHROUGH)
{
    SetBackgroundColour(wxColour(255, 255, 255, 255));
    SetBackgroundStyle(wxBG_STYLE_TRANSPARENT);
}

// Paints a grid of varying hue and alpha
void SeeThroughFrame::OnPaint(wxPaintEvent& WXUNUSED(evt))
{
    wxPaintDC dc(this);
    dc.SetPen(wxNullPen);

    int xcount = 8;
    int ycount = 8;

    float xstep = 1. / xcount;
    float ystep = 1. / ycount;

    int width = GetClientSize().GetWidth();
    int height = GetClientSize().GetHeight();

    for ( float x = 0.; x < 1.; x += xstep )
    {
        for ( float y = 0.; y < 1.; y += ystep )
        {
            wxImage::RGBValue v = wxImage::HSVtoRGB(wxImage::HSVValue(x, 1., 1.));
            dc.SetBrush(wxBrush(wxColour(v.red, v.green, v.blue,
                                (int)(255*(1. - y)))));
            int x1 = (int)(x * width);
            int y1 = (int)(y * height);
            int x2 = (int)((x + xstep) * width);
            int y2 = (int)((y + ystep) * height);
            dc.DrawRectangle(x1, y1, x2 - x1, y2 - y1);
        }
    }
}

// Switches between colour and transparent background on doubleclick
void SeeThroughFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt))
{
    m_currentState = (State)((m_currentState + 1) % STATE_MAX);

    switch ( m_currentState )
    {
        case STATE_OPAQUE:
            SetBackgroundStyle(wxBG_STYLE_COLOUR);
            SetTransparent(255);
            SetTitle("Opaque");
            break;

        case STATE_SEETHROUGH:
            SetBackgroundStyle(wxBG_STYLE_TRANSPARENT);
            SetTransparent(255);
            SetTitle("See through");
            break;

        case STATE_TRANSPARENT:
            SetBackgroundStyle(wxBG_STYLE_COLOUR);
            SetTransparent(128);
            SetTitle("Semi-transparent");
            break;

        case STATE_MAX:
            wxFAIL_MSG( "unreachable" );
    }

    Refresh();
}