filepicker.h

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/gtk/filedirpicker.h
// Purpose:     wxFileButton, wxDirButton header
// Author:      Francesco Montorsi
// Modified by:
// Created:     14/4/2006
// Copyright:   (c) Francesco Montorsi
// RCS-ID:      $Id: filepicker.h,v 1.6 2006/12/07 07:22:53 PC Exp $
// Licence:     wxWindows Licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GTK_FILEPICKER_H_
#define _WX_GTK_FILEPICKER_H_

// since GtkColorButton is available only for GTK+ >= 2.4,
// we need to use generic versions if we detect (at runtime)
// that GTK+ < 2.4
#include "wx/generic/filepickerg.h"

//-----------------------------------------------------------------------------
// wxFileButton and wxDirButton shared code
// (cannot be a base class since they need to derive from wxGenericFileButton
//  and from wxGenericDirButton classes !)
//-----------------------------------------------------------------------------

#define FILEDIRBTN_OVERRIDES                                                  \
    /* NULL is because of a problem with destruction order which happens   */ \
    /* if we pass GetParent(): in fact, this GTK native implementation     */ \
    /* needs to create the dialog in ::Create() and not for each user      */ \
    /* request in response to the user click as the generic implementation */ \
    /* does.                                                               */ \
    virtual wxWindow *GetDialogParent()                                       \
    {                                                                         \
        return NULL;                                                          \
    }                                                                         \
                                                                              \
    virtual bool Destroy()                                                    \
    {                                                                         \
        m_dialog->Destroy();                                                  \
        return wxButton::Destroy();                                           \
    }                                                                         \
                                                                              \
    /* even if wx derive from wxGenericFileButton, i.e. from wxButton, our */ \
    /* native GTK+ widget does not derive from GtkButton thus *all* uses   */ \
    /* GTK_BUTTON(m_widget) macro done by wxButton must be bypassed to     */ \
    /* avoid bunch of GTK+ warnings like:                                  */ \
    /*      invalid cast from `GtkFileChooserButton' to  `GtkButton'       */ \
    /* so, override wxButton::GTKGetWindow and return NULL as GTK+ doesn't */ \
    /* give us access to the internal GdkWindow of a GtkFileChooserButton  */ \
protected:                                                                    \
    virtual GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const         \
        { return NULL; }


//-----------------------------------------------------------------------------
// wxFileButton
//-----------------------------------------------------------------------------

class WXDLLIMPEXP_CORE wxFileButton : public wxGenericFileButton
{
public:
    wxFileButton() { m_dialog = NULL; }
    wxFileButton(wxWindow *parent,
                 wxWindowID id,
                 const wxString& label = wxFilePickerWidgetLabel,
                 const wxString &path = wxEmptyString,
                 const wxString &message = wxFileSelectorPromptStr,
                 const wxString &wildcard = wxFileSelectorDefaultWildcardStr,
                 const wxPoint& pos = wxDefaultPosition,
                 const wxSize& size = wxDefaultSize,
                 long style = wxFILEBTN_DEFAULT_STYLE,
                 const wxValidator& validator = wxDefaultValidator,
                 const wxString& name = wxFilePickerWidgetNameStr)
    {
        m_dialog = NULL;
        Create(parent, id, label, path, message, wildcard,
               pos, size, style, validator, name);
    }

    virtual ~wxFileButton();


public:     // overrides

    bool Create(wxWindow *parent,
                wxWindowID id,
                const wxString& label = wxFilePickerWidgetLabel,
                const wxString &path = wxEmptyString,
                const wxString &message = wxFileSelectorPromptStr,
                const wxString &wildcard = wxFileSelectorDefaultWildcardStr,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = 0,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = wxFilePickerWidgetNameStr);

    // event handler for the click
    void OnDialogOK(wxCommandEvent &);

    // GtkFileChooserButton does not support GTK_FILE_CHOOSER_ACTION_SAVE
    // so we replace it with GTK_FILE_CHOOSER_ACTION_OPEN; since wxFD_SAVE
    // is not supported, wxFD_OVERWRITE_PROMPT isn't too...
    virtual long GetDialogStyle() const
    {
         return (wxGenericFileButton::GetDialogStyle() &
                     ~(wxFD_SAVE | wxFD_OVERWRITE_PROMPT)) | wxFD_OPEN;
    }

    virtual void SetPath(const wxString &str);

    // see macro defined above
    FILEDIRBTN_OVERRIDES

protected:
    wxDialog *m_dialog;

    DECLARE_DYNAMIC_CLASS(wxFileButton)
};


//-----------------------------------------------------------------------------
// wxDirButton
//-----------------------------------------------------------------------------

class WXDLLIMPEXP_CORE wxDirButton : public wxGenericDirButton
{
public:
    wxDirButton() { Init(); }
    wxDirButton(wxWindow *parent,
                wxWindowID id,
                const wxString& label = wxFilePickerWidgetLabel,
                const wxString &path = wxEmptyString,
                const wxString &message = wxFileSelectorPromptStr,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = wxDIRBTN_DEFAULT_STYLE,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = wxFilePickerWidgetNameStr)
    {
        Init();

        Create(parent, id, label, path, message, wxEmptyString,
                pos, size, style, validator, name);
    }

    virtual ~wxDirButton();


public:     // overrides

    bool Create(wxWindow *parent,
                wxWindowID id,
                const wxString& label = wxFilePickerWidgetLabel,
                const wxString &path = wxEmptyString,
                const wxString &message = wxFileSelectorPromptStr,
                const wxString &wildcard = wxFileSelectorDefaultWildcardStr,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = 0,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = wxFilePickerWidgetNameStr);


    // GtkFileChooserButton does not support GTK_FILE_CHOOSER_CREATE_FOLDER
    // thus we must ensure that the wxDD_DIR_MUST_EXIST style was given
    long GetDialogStyle() const
    {
        return (wxGenericDirButton::GetDialogStyle() | wxDD_DIR_MUST_EXIST);
    }

    virtual void SetPath(const wxString &str);

    // see macro defined above
    FILEDIRBTN_OVERRIDES

protected:
    // common part of all ctors
    void Init()
    {
        m_dialog = NULL;
        m_bIgnoreNextChange = false;
    }

    wxDialog *m_dialog;

public:    // used by the GTK callback only

    bool m_bIgnoreNextChange;

    void UpdatePath(const char *gtkpath)
        { m_path = wxString::FromAscii(gtkpath); }

private:
    DECLARE_DYNAMIC_CLASS(wxDirButton)
};

#undef FILEDIRBTN_OVERRIDES

#endif // _WX_GTK_FILEPICKER_H_