simplify mouse wheel signal handler

[wxWidgets.git] / src / generic / combog.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        combog.cpp
// Purpose:     Generic wxComboControl
// Author:      Jaakko Salli
// Modified by:
// Created:     Apr-30-2006
// RCS-ID:      $Id$
// Copyright:   (c) 2005 Jaakko Salli
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_COMBOCONTROL

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/combobox.h"
    #include "wx/dcclient.h"
    #include "wx/settings.h"
#endif

#include "wx/dcbuffer.h"

#include "wx/combo.h"


// ----------------------------------------------------------------------------
// Some constant adjustments to make the generic more bearable

#if defined(__WXUNIVERSAL__)

#define TEXTCTRLXADJUST                 0 // position adjustment for wxTextCtrl, with zero indent
#define TEXTCTRLYADJUST                 0
#define TEXTXADJUST                     0 // how much is read-only text's x adjusted
#define DEFAULT_DROPBUTTON_WIDTH        19

#elif defined(__WXMSW__)

#define TEXTCTRLXADJUST                 2 // position adjustment for wxTextCtrl, with zero indent
#define TEXTCTRLYADJUST                 3
#define TEXTXADJUST                     0 // how much is read-only text's x adjusted
#define DEFAULT_DROPBUTTON_WIDTH        17

#elif defined(__WXGTK__)

#define TEXTCTRLXADJUST                 -1 // position adjustment for wxTextCtrl, with zero indent
#define TEXTCTRLYADJUST                 0
#define TEXTXADJUST                     1 // how much is read-only text's x adjusted
#define DEFAULT_DROPBUTTON_WIDTH        23

#elif defined(__WXMAC__)

#define TEXTCTRLXADJUST                 0 // position adjustment for wxTextCtrl, with zero indent
#define TEXTCTRLYADJUST                 0
#define TEXTXADJUST                     0 // how much is read-only text's x adjusted
#define DEFAULT_DROPBUTTON_WIDTH        19

#else

#define TEXTCTRLXADJUST                 0 // position adjustment for wxTextCtrl, with zero indent
#define TEXTCTRLYADJUST                 0
#define TEXTXADJUST                     0 // how much is read-only text's x adjusted
#define DEFAULT_DROPBUTTON_WIDTH        19

#endif


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

// Only implement if no native or it wasn't fully featured
#ifndef wxCOMBOCONTROL_FULLY_FEATURED


// ----------------------------------------------------------------------------
// wxGenericComboControl
// ----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(wxGenericComboControl, wxComboControlBase)
    EVT_PAINT(wxGenericComboControl::OnPaintEvent)
    EVT_MOUSE_EVENTS(wxGenericComboControl::OnMouseEvent)
END_EVENT_TABLE()


IMPLEMENT_DYNAMIC_CLASS(wxGenericComboControl, wxComboControlBase)

void wxGenericComboControl::Init()
{
}

bool wxGenericComboControl::Create(wxWindow *parent,
                                   wxWindowID id,
                                   const wxString& value,
                                   const wxPoint& pos,
                                   const wxSize& size,
                                   long style,
                                   const wxValidator& validator,
                                   const wxString& name)
{

    // Set border
    long border = style & wxBORDER_MASK;

    if ( !border )
    {
#if defined(__WXUNIVERSAL__)
        border = wxBORDER_SIMPLE;
#elif defined(__WXMSW__)
        // For XP, have 1-width custom border, for older version use sunken
        if ( wxUxThemeEngine::GetIfActive() )
        {
            border = wxBORDER_NONE;
            m_widthCustomBorder = 1;
        }
        else
            border = wxBORDER_SUNKEN;
#elif defined(__WXGTK__)
        border = wxBORDER_NONE;
        //m_widthCustomBorder = 2;
        m_widthCustomBorder = 1;
#else
        border = wxBORDER_SIMPLE;
#endif

        style = (style & ~(wxBORDER_MASK)) | border;
    }

#if defined(__WXGTK__)
    Customize( wxCC_BUTTON_OUTSIDE_BORDER |
               wxCC_NO_TEXT_AUTO_SELECT );
#endif

    if ( style & wxCC_STD_BUTTON )
        m_iFlags |= wxCC_POPUP_ON_MOUSE_UP;

    // create main window
    if ( !wxComboControlBase::Create(parent,
                                     id,
                                     value,
                                     wxDefaultPosition,
                                     wxDefaultSize,
                                     style | wxFULL_REPAINT_ON_RESIZE,
                                     wxDefaultValidator,
                                     name) )
        return false;

    // Create textctrl, if necessary
    CreateTextCtrl( wxNO_BORDER, validator );

    // Add keyboard input handlers for main control and textctrl
    InstallInputHandlers( true );

    // Set background
    SetBackgroundStyle( wxBG_STYLE_CUSTOM ); // for double-buffering

    // SetSize should be called last
    SetSize(pos.x,pos.y,size.x,size.y);

    return true;
}

wxGenericComboControl::~wxGenericComboControl()
{
}

void wxGenericComboControl::OnResize()
{

    // Recalculates button and textctrl areas
    CalculateAreas(DEFAULT_DROPBUTTON_WIDTH);

#if 0
    // Move separate button control, if any, to correct position
    if ( m_btn )
    {
        wxSize sz = GetClientSize();
        m_btn->SetSize( m_btnArea.x + m_btnSpacingX,
                        (sz.y-m_btnSize.y)/2,
                        m_btnSize.x,
                        m_btnSize.y );
    }
#endif

    // Move textctrl, if any, accordingly
    PositionTextCtrl( TEXTCTRLXADJUST, TEXTCTRLYADJUST );
}

void wxGenericComboControl::OnPaintEvent( wxPaintEvent& WXUNUSED(event) )
{
    wxSize sz = GetClientSize();
    wxBufferedPaintDC dc(this,GetBufferBitmap(sz));

    const wxRect& rectb = m_btnArea;
    wxRect rect = m_tcArea;

    // artificial simple border
    if ( m_widthCustomBorder )
    {
        int customBorder = m_widthCustomBorder;

        // Set border colour
        wxPen pen1( wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT),
                    customBorder,
                    wxSOLID );
        dc.SetPen( pen1 );

        // area around both controls
        wxRect rect2(0,0,sz.x,sz.y);
        if ( m_iFlags & wxCC_IFLAG_BUTTON_OUTSIDE )
        {
            rect2 = m_tcArea;
            if ( customBorder == 1 )
            {
                rect2.Inflate(1);
            }
            else
            {
            #ifdef __WXGTK__
                rect2.x -= 1;
                rect2.y -= 1;
            #else
                rect2.x -= customBorder;
                rect2.y -= customBorder;
            #endif
                rect2.width += 1 + customBorder;
                rect2.height += 1 + customBorder;
            }
        }

        dc.SetBrush( *wxTRANSPARENT_BRUSH );
        dc.DrawRectangle(rect2);
    }

    wxColour winCol = GetBackgroundColour();
    dc.SetBrush(winCol);
    dc.SetPen(winCol);

    //wxLogDebug(wxT("hei: %i tcy: %i tchei: %i"),GetClientSize().y,m_tcArea.y,m_tcArea.height);
    //wxLogDebug(wxT("btnx: %i tcx: %i tcwid: %i"),m_btnArea.x,m_tcArea.x,m_tcArea.width);

    // clear main background
    dc.DrawRectangle(rect);

    if ( !m_btn )
        // Standard button rendering
        DrawButton(dc,rectb,true);

    // paint required portion on the control
    if ( (!m_text || m_widthCustomPaint) )
    {
        wxASSERT( m_widthCustomPaint >= 0 );

        // this is intentionally here to allow drawed rectangle's
        // right edge to be hidden
        if ( m_text )
            rect.width = m_widthCustomPaint;

        dc.SetFont( GetFont() );

        dc.SetClippingRegion(rect);
        if ( m_popupInterface )
            m_popupInterface->PaintComboControl(dc,rect);
        else
            wxComboPopup::DefaultPaintComboControl(this,dc,rect);
    }
}

void wxGenericComboControl::OnMouseEvent( wxMouseEvent& event )
{
    bool isOnButtonArea = m_btnArea.Inside(event.m_x,event.m_y);
    int handlerFlags = isOnButtonArea ? wxCC_MF_ON_BUTTON : 0;

    // Preprocessing fabricates double-clicks and prevents
    // (it may also do other common things in future)
    if ( PreprocessMouseEvent(event,handlerFlags) )
        return;

#ifdef __WXMSW__
    const bool ctrlIsButton = true;
#else
    const bool ctrlIsButton = false;
#endif

    if ( ctrlIsButton &&
         (m_windowStyle & (wxCC_SPECIAL_DCLICK|wxCB_READONLY)) == wxCB_READONLY )
    {
        // if no textctrl and no special double-click, then the entire control acts
        // as a button
        handlerFlags |= wxCC_MF_ON_BUTTON;
        if ( HandleButtonMouseEvent(event,handlerFlags) )
            return;
    }
    else
    {
        if ( isOnButtonArea || HasCapture() )
        {
            if ( HandleButtonMouseEvent(event,handlerFlags) )
                return;
        }
        else if ( m_btnState )
        {
            // otherwise need to clear the hover status
            m_btnState = 0;
            RefreshRect(m_btnArea);
        }
    }

    //
    // This will handle left_down and left_dclick events outside button in a Windows/GTK-like manner.
    // See header file for further information on this method.
    HandleNormalMouseEvent(event);

}

#ifdef __WXUNIVERSAL__

bool wxGenericComboControl::PerformAction(const wxControlAction& action,
                                          long numArg,
                                          const wxString& strArg)
{
    bool processed = false;
    if ( action == wxACTION_COMBOBOX_POPUP )
    {
        if ( !m_isPopupShown )
        {
            ShowPopup();

            processed = true;
        }
    }
    else if ( action == wxACTION_COMBOBOX_DISMISS )
    {
        if ( m_isPopupShown )
        {
            HidePopup();

            processed = true;
        }
    }

    if ( !processed )
    {
        // pass along
        return wxControl::PerformAction(action, numArg, strArg);
    }

    return true;
}

#endif // __WXUNIVERSAL__

// If native wxComboControl was not defined, then prepare a simple
// front-end so that wxRTTI works as expected.
#ifndef _WX_COMBOCONTROL_H_
IMPLEMENT_DYNAMIC_CLASS(wxComboControl, wxGenericComboControl)
#endif

#endif // !wxCOMBOCONTROL_FULLY_FEATURED

#endif // wxUSE_COMBOCONTROL