wxWidgets/include/wx/pickerbase.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/pickerbase.h
// Purpose:     wxPickerBase definition
// Author:      Francesco Montorsi (based on Vadim Zeitlin's code)
// Modified by:
// Created:     14/4/2006
// Copyright:   (c) Vadim Zeitlin, Francesco Montorsi
// RCS-ID:      $Id$
// Licence:     wxWindows Licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_PICKERBASE_H_BASE_
#define _WX_PICKERBASE_H_BASE_

#include "wx/control.h"

class WXDLLIMPEXP_CORE wxTextCtrl;

extern WXDLLEXPORT_DATA(const wxChar) wxButtonNameStr[];

// ----------------------------------------------------------------------------
// wxPickerBase is the base class for the picker controls which support
// a wxPB_USE_TEXTCTRL style; i.e. for those pickers which can use an auxiliary
// text control next to the 'real' picker.
//
// The wxTextPickerHelper class manages enabled/disabled state of the text control,
// its sizing and positioning.
// ----------------------------------------------------------------------------

#define wxPB_USE_TEXTCTRL           0x0002

class WXDLLIMPEXP_CORE wxPickerBase : public wxControl
{
public:
    // ctor: text is the associated text control
    wxPickerBase() : m_text(NULL), m_picker(NULL), m_sizer(NULL)
        { m_container.SetContainerWindow(this); }
    virtual ~wxPickerBase() {}


    // if present, intercepts wxPB_USE_TEXTCTRL style and creates the text control
    // The 3rd argument is the initial wxString to display in the text control
    bool CreateBase(wxWindow *parent, wxWindowID id,
        const wxString& text = wxEmptyString,
        const wxPoint& pos = wxDefaultPosition,
        const wxSize& size = wxDefaultSize, long style = 0,
        const wxValidator& validator = wxDefaultValidator,
        const wxString& name = wxButtonNameStr);


public:     // public API

    // margin between the text control and the picker
    void SetInternalMargin(int newmargin)
        { GetTextCtrlItem()->SetBorder(newmargin); m_sizer->Layout(); }
    int GetInternalMargin() const
        { return GetTextCtrlItem()->GetBorder(); }

    // proportion of the text control respect the picker
    // (which has a fixed proportion value of 1)
    void SetTextCtrlProportion(int prop)
        { GetTextCtrlItem()->SetProportion(prop); m_sizer->Layout(); }
    int GetTextCtrlProportion() const
        { return GetTextCtrlItem()->GetProportion(); }

    bool IsTextCtrlGrowable() const
        { return (GetTextCtrlItem()->GetFlag() & wxGROW) != 0; }
    void SetTextCtrlGrowable(bool grow = true)
    {
        int f = GetDefaultTextCtrlFlag();
        if ( grow )
            f |= wxGROW;
        else
            f &= ~wxGROW;

        GetTextCtrlItem()->SetFlag(f);
    }

    bool IsPickerCtrlGrowable() const
        { return (GetPickerCtrlItem()->GetFlag() & wxGROW) != 0; }
    void SetPickerCtrlGrowable(bool grow = true)
    {
        int f = GetDefaultPickerCtrlFlag();
        if ( grow )
            f |= wxGROW;
        else
            f &= ~wxGROW;

        GetPickerCtrlItem()->SetFlag(f);
    }

    bool HasTextCtrl() const
        { return m_text != NULL; }
    wxTextCtrl *GetTextCtrl()
        { return m_text; }
    wxControl *GetPickerCtrl()
        { return m_picker; }

public:     // methods that derived class must/may override

    virtual void UpdatePickerFromTextCtrl() = 0;
    virtual void UpdateTextCtrlFromPicker() = 0;

protected:        // utility functions

    // event handlers
    void OnTextCtrlDelete(wxWindowDestroyEvent &);
    void OnTextCtrlUpdate(wxCommandEvent &);
    void OnTextCtrlKillFocus(wxFocusEvent &);

    void OnSize(wxSizeEvent &);

    // returns the set of styles for the attached wxTextCtrl
    // from given wxPickerBase's styles
    virtual long GetTextCtrlStyle(long style) const
        { return (style & wxWINDOW_STYLE_MASK); }

    // returns the set of styles for the m_picker
    virtual long GetPickerStyle(long style) const
        { return (style & wxWINDOW_STYLE_MASK); }


    wxSizerItem *GetPickerCtrlItem() const
    {
        if (this->HasTextCtrl())
            return m_sizer->GetItem((size_t)1);
        return m_sizer->GetItem((size_t)0);
    }

    wxSizerItem *GetTextCtrlItem() const
    {
        wxASSERT(this->HasTextCtrl());
        return m_sizer->GetItem((size_t)0);
    }

    int GetDefaultPickerCtrlFlag() const
    {
        // on macintosh, without additional borders
        // there's not enough space for focus rect
        return wxALIGN_CENTER_VERTICAL|wxGROW
#ifdef __WXMAC__
            | wxTOP | wxRIGHT | wxBOTTOM
#endif
            ;
    }

    int GetDefaultTextCtrlFlag() const
    {
        // on macintosh, without wxALL there's not enough space for focus rect
        return wxALIGN_CENTER_VERTICAL
#ifdef __WXMAC__
            | wxALL
#else
            | wxRIGHT
#endif
            ;
    }

    void PostCreation();

protected:
    wxTextCtrl *m_text;     // can be NULL
    wxControl *m_picker;
    wxBoxSizer *m_sizer;

private:
    DECLARE_ABSTRACT_CLASS(wxPickerBase)
    DECLARE_EVENT_TABLE()

    // This class must be something just like a panel...
    WX_DECLARE_CONTROL_CONTAINER();
};


#endif
    // _WX_PICKERBASE_H_BASE_