menubtn.cpp

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

/////////////////////////////////////////////////////////////////////////////
// Name:        wxMenuButton
// Purpose:     A button with a dropdown wxMenu
// Author:      John Labenski
// Modified by:
// Created:     11/05/2002
// RCS-ID:
// Copyright:   (c) John Labenki
// Licence:     wxWidgets licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "menubtn.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/control.h"
    #include "wx/menu.h"
    #include "wx/settings.h"
    #include "wx/bitmap.h"
    #include "wx/pen.h"
    #include "wx/dc.h"
#endif // WX_PRECOMP

#include <wx/tglbtn.h>
#include <wx/dcclient.h>
#include <wx/timer.h>
#include <wx/image.h>

#include "menubtn.h"



// ==========================================================================
// wxCustomButton
// ==========================================================================
IMPLEMENT_DYNAMIC_CLASS( wxCustomButton, wxControl )

BEGIN_EVENT_TABLE(wxCustomButton,wxControl)
    EVT_MOUSE_EVENTS ( wxCustomButton::OnMouseEvents )
    EVT_PAINT        ( wxCustomButton::OnPaint )
    EVT_SIZE         ( wxCustomButton::OnSize )
END_EVENT_TABLE()

wxCustomButton::~wxCustomButton()
{
    if (HasCapture()) ReleaseMouse();
    if (m_timer) delete m_timer;
}

void wxCustomButton::Init()
{
    m_focused = FALSE;
    m_labelMargin = wxSize(4,4);
    m_bitmapMargin = wxSize(2,2);
    m_down = 0;
    m_timer = NULL;
    m_eventType = 0;
    m_button_style = wxCUSTBUT_TOGGLE|wxCUSTBUT_BOTTOM;
}

bool wxCustomButton::Create(wxWindow* parent, wxWindowID id,
                            const wxString& label, const wxBitmap &bitmap,
                            const wxPoint& pos, const wxSize& size,
                            long style, const wxValidator& val,
                            const wxString& name)
{
    if (!wxControl::Create(parent,id,pos,size,wxNO_BORDER|wxCLIP_CHILDREN,val,name))
        return FALSE;
    
    wxControl::SetLabel(label);    
    wxControl::SetBackgroundColour(parent->GetBackgroundColour());
    wxControl::SetForegroundColour(parent->GetForegroundColour());
    wxControl::SetFont(parent->GetFont());

    if (bitmap.Ok()) m_bmpLabel = bitmap;
    
    if (!SetButtonStyle(style)) return FALSE;

    wxSize bestSize = DoGetBestSize();
    SetSize(wxSize(size.x<0 ? bestSize.x:size.x, size.y<0 ? bestSize.y:size.y));
#if (wxMINOR_VERSION<8) 
    SetBestSize(GetSize());
#else
    SetInitialSize(GetSize());
#endif
    
    CalcLayout(TRUE);
    return TRUE;
}

void wxCustomButton::SetValue(bool depressed)
{
    wxCHECK_RET(!(m_button_style & wxCUSTBUT_NOTOGGLE), wxT("can't set button state"));
    m_down = depressed ? 1 : 0;
    Refresh(FALSE);
}

bool wxCustomButton::SetButtonStyle(long style)
{
    int n_styles = 0;
    if ((style & wxCUSTBUT_LEFT) != 0)   n_styles++;
    if ((style & wxCUSTBUT_RIGHT) != 0)  n_styles++;
    if ((style & wxCUSTBUT_TOP) != 0)    n_styles++;
    if ((style & wxCUSTBUT_BOTTOM) != 0) n_styles++;
    wxCHECK_MSG(n_styles < 2, FALSE, wxT("Only one wxCustomButton label position allowed"));
    
    n_styles = 0;
    if ((style & wxCUSTBUT_NOTOGGLE) != 0)       n_styles++;
    if ((style & wxCUSTBUT_BUTTON) != 0)         n_styles++;
    if ((style & wxCUSTBUT_TOGGLE) != 0)         n_styles++;
    if ((style & wxCUSTBUT_BUT_DCLICK_TOG) != 0) n_styles++;
    if ((style & wxCUSTBUT_TOG_DCLICK_BUT) != 0) n_styles++;
    wxCHECK_MSG(n_styles < 2, FALSE, wxT("Only one wxCustomButton style allowed"));

    m_button_style = style;
    
    if ((m_button_style & wxCUSTBUT_BUTTON) != 0) 
        m_down = 0;
    
    CalcLayout(TRUE);
    return TRUE;
}

void wxCustomButton::SetLabel( const wxString &label )
{
    wxControl::SetLabel(label);
    CalcLayout(TRUE);
}

// sequence of events in GTK is up, dclick, up.

void wxCustomButton::OnMouseEvents(wxMouseEvent& event)
{
    if (m_button_style & wxCUSTBUT_NOTOGGLE) return;
    
    if (event.LeftDown() || event.RightDown())
    {
        if (!HasCapture()) 
            CaptureMouse(); // keep depressed until up
        
        m_down++;
        Redraw();
    }
    else if (event.LeftDClick() || event.RightDClick())
    {
        m_down++; // GTK eats second down event
        Redraw();
    }
    else if (event.LeftUp())
    {
        if (HasCapture()) 
            ReleaseMouse();
        
        m_eventType = wxEVT_LEFT_UP;
        
#if (wxMINOR_VERSION<8) 
        if (wxRect(wxPoint(0,0), GetSize()).Inside(event.GetPosition()))
#else
        if (wxRect(wxPoint(0,0), GetSize()).Contains(event.GetPosition()))
#endif
        {
            if ((m_button_style & wxCUSTBUT_BUTTON) && (m_down > 0))
            {
                m_down = 0;
                Redraw();
                SendEvent();
                return;
            }
            else
            {
                if (!m_timer)
                {
                    m_timer = new wxTimer(this, m_down+1);
                    m_timer->Start(200, TRUE);
                }
                else
                {
                    m_eventType = wxEVT_LEFT_DCLICK;
                }
                
                if ((m_button_style & wxCUSTBUT_TOGGLE) && 
                    (m_button_style & wxCUSTBUT_TOG_DCLICK_BUT)) m_down++;
            }
        }

        Redraw();
    }
    else if (event.RightUp())
    {
        if (HasCapture()) 
            ReleaseMouse();
        
        m_eventType = wxEVT_RIGHT_UP;

#if (wxMINOR_VERSION<8) 
        if (wxRect(wxPoint(0,0), GetSize()).Inside(event.GetPosition()))
#else
        if (wxRect(wxPoint(0,0), GetSize()).Contains(event.GetPosition()))
#endif
        {
            if ((m_button_style & wxCUSTBUT_BUTTON) && (m_down > 0))
            {
                m_down = 0;
                Redraw();
                SendEvent();
                return;
            }
            else
            {
                m_down++;
            
                if (!m_timer)
                {
                    m_timer = new wxTimer(this, m_down);
                    m_timer->Start(250, TRUE);
                }
                else
                {
                    m_eventType = wxEVT_RIGHT_DCLICK;
                }
            }
        }
        
        Redraw();
    }
    else if (event.Entering())
    {
        m_focused = TRUE;
        if ((event.LeftIsDown() || event.RightIsDown()) && HasCapture()) 
            m_down++;
        
        Redraw();
    }
    else if (event.Leaving())
    {
        m_focused = FALSE;
        if ((event.LeftIsDown() || event.RightIsDown()) && HasCapture())
            m_down--;
        
        Redraw();
    }
}



void wxCustomButton::SendEvent()
{
    if (((m_button_style & wxCUSTBUT_TOGGLE) && (m_eventType == wxEVT_LEFT_UP)) || 
        ((m_button_style & wxCUSTBUT_BUT_DCLICK_TOG) && (m_eventType == wxEVT_LEFT_DCLICK)) ||
        ((m_button_style & wxCUSTBUT_TOG_DCLICK_BUT) && (m_eventType == wxEVT_LEFT_UP)))
    {
        wxCommandEvent eventOut(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, GetId());
        eventOut.SetInt(m_down%2 ? 1 : 0);
        eventOut.SetExtraLong(m_eventType);
        eventOut.SetEventObject(this);
        GetEventHandler()->ProcessEvent(eventOut);
    }
    else
    {
        wxCommandEvent eventOut(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
        eventOut.SetInt(0);
        eventOut.SetExtraLong(m_eventType);
        eventOut.SetEventObject(this);
        GetEventHandler()->ProcessEvent(eventOut);
    }
}

wxBitmap wxCustomButton::CreateBitmapDisabled(const wxBitmap &bitmap) const
{    
    wxCHECK_MSG(bitmap.Ok(), wxNullBitmap, wxT("invalid bitmap"));
    
    unsigned char br = GetBackgroundColour().Red();
    unsigned char bg = GetBackgroundColour().Green();
    unsigned char bb = GetBackgroundColour().Blue();
        
    wxImage image = bitmap.ConvertToImage();
    int pos, width = image.GetWidth(), height = image.GetHeight();
    unsigned char *img_data = image.GetData();

    for (int j=0; j<height; j++)
    {
        for (int i=j%2; i<width; i+=2)
        {   
            pos = (j*width+i)*3;
            img_data[pos  ] = br; 
            img_data[pos+1] = bg; 
            img_data[pos+2] = bb; 
        }
    }
        
    return wxBitmap(image);
}

void wxCustomButton::SetBitmapLabel(const wxBitmap& bitmap)
{ 
    m_bmpLabel = bitmap; 
    CalcLayout(TRUE); 
}

void wxCustomButton::OnPaint(wxPaintEvent& WXUNUSED(event))
{
    wxPaintDC dc(this);
    Paint(dc);
}

void wxCustomButton::Redraw()
{
    wxClientDC dc(this);
    Paint(dc);
}

void wxCustomButton::Paint( wxDC &dc )
{
#if (wxMINOR_VERSION<8) 
    dc.BeginDrawing();
#endif

    int w, h;
    GetSize(&w,&h);
 
    wxColour foreColour = GetForegroundColour();
    wxColour backColour = GetBackgroundColour();

    if (m_focused)
    {
        backColour.Set( wxMin(backColour.Red()   + 20, 255),
                        wxMin(backColour.Green() + 20, 255),
                        wxMin(backColour.Blue()  + 20, 255) );
    }

    wxBitmap bitmap;
    
    if (IsEnabled())
    {
        if (GetValue() && m_bmpSelected.Ok()) 
            bitmap = m_bmpSelected;
        else if (m_focused && m_bmpFocus.Ok()) 
            bitmap = m_bmpFocus;
        else if (m_bmpLabel.Ok())  
            bitmap = m_bmpLabel;
    }
    else
    {
        // try to create disabled if it doesn't exist
        if (!m_bmpDisabled.Ok() && m_bmpLabel.Ok())
            m_bmpDisabled = CreateBitmapDisabled(m_bmpLabel);

        if (m_bmpDisabled.Ok())
            bitmap = m_bmpDisabled;
        else if (m_bmpLabel.Ok()) 
            bitmap = m_bmpLabel;

        foreColour = wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT);
    }

    wxBrush brush(backColour, wxSOLID);
    dc.SetBackground(brush);
    dc.SetBrush(brush);
    dc.SetPen(*wxTRANSPARENT_PEN);

    dc.DrawRectangle(0, 0, w, h);

    if (bitmap.Ok()) 
        dc.DrawBitmap(bitmap, m_bitmapPos.x, m_bitmapPos.y, TRUE );

    if (!GetLabel().IsEmpty())
    {
        dc.SetFont(GetFont());
        dc.SetTextBackground(backColour);
        dc.SetTextForeground(foreColour);
        dc.DrawText(GetLabel(), m_labelPos.x, m_labelPos.y);
    }
    
    if (GetValue())                                        // draw sunken border
    {
        dc.SetPen(*wxGREY_PEN);
        dc.DrawLine(0,h-1,0,0);     dc.DrawLine(0,0,w,0);
        dc.SetPen(*wxWHITE_PEN);
        dc.DrawLine(w-1,1,w-1,h-1); dc.DrawLine(w-1,h-1,0,h-1);
        dc.SetPen(*wxBLACK_PEN);
        dc.DrawLine(1,h-2,1,1);     dc.DrawLine(1,1,w-1,1);
    }
    else if (((m_button_style & wxCUSTBUT_FLAT) == 0) || m_focused) // draw raised border
    {
        dc.SetPen(*wxWHITE_PEN);
        dc.DrawLine(0,h-2,0,0);     dc.DrawLine(0,0,w-1,0);
        dc.SetPen(*wxBLACK_PEN);
        dc.DrawLine(w-1,0,w-1,h-1); dc.DrawLine(w-1,h-1,-1,h-1);
        dc.SetPen(*wxGREY_PEN);
        dc.DrawLine(2,h-2,w-2,h-2); dc.DrawLine(w-2,h-2,w-2,1);
    }

    dc.SetBackground(wxNullBrush);
    dc.SetBrush(wxNullBrush);
    dc.SetPen(wxNullPen);
#if (wxMINOR_VERSION<8) 
    dc.EndDrawing();
#endif
}

void wxCustomButton::OnSize( wxSizeEvent &event )
{
    CalcLayout(TRUE);
    event.Skip();
}

void wxCustomButton::SetMargins(const wxSize &margin, bool fit)
{ 
    m_labelMargin = margin; 
    m_bitmapMargin = margin; 
    CalcLayout(TRUE); 
    if (fit) SetSize(DoGetBestSize());
}
void wxCustomButton::SetLabelMargin(const wxSize &margin, bool fit) 
{ 
    m_labelMargin = margin; 
    CalcLayout(TRUE); 
    if (fit) SetSize(DoGetBestSize());
}
void wxCustomButton::SetBitmapMargin(const wxSize &margin, bool fit) 
{ 
    m_bitmapMargin = margin; 
    CalcLayout(TRUE); 
    if (fit) SetSize(DoGetBestSize());