io Programmo 10/ioProg_10.iso/soft/optima/samples.z/PreviewFileDialog.wxc

Text File | 1996-08-13 | 8.0 KB | 297 lines

Save Format v1.3
@begin ClassFile "PreviewFileDialog"
 Exported 0;

@begin-code BaseClassList

public WFileDialog

@end-code;

 @begin UserFunction "PreviewFileDialog()"
  GencodeSrcLine 16;
  FunctionName "PreviewFileDialog::PreviewFileDialog()";
 @end;

 @begin UserFunction "Prototype for PreviewFileDialog()"
  Private 1;
  GencodeSrcLine 24;
  FunctionName "PreviewFileDialog::Prototype for PreviewFileDialog()";
 @end;

 @begin UserFunction "~PreviewFileDialog()"
  GencodeSrcLine 31;
  FunctionName "PreviewFileDialog::~PreviewFileDialog()";
 @end;

 @begin UserFunction "Prototype for ~PreviewFileDialog()"
  Private 1;
  GencodeSrcLine 26;
  FunctionName "PreviewFileDialog::Prototype for ~PreviewFileDialog()";
 @end;

 @begin UserFunction "handleCreate( WObject *, WEventData * )"
  Private 1;
  GencodeSrcLine 44;
  FunctionName "PreviewFileDialog::handleCreate( WObject *, WEventData * )";
 @end;

 @begin UserFunction "Prototype for handleCreate( WObject *, WEventData * )"
  Private 1;
  GencodeSrcLine 28;
  FunctionName "PreviewFileDialog::Prototype for handleCreate( WObject *, WEventData * )";
 @end;

 @begin UserFunction "handleChange( WObject *, WEventData * )"
  Private 1;
  GencodeSrcLine 91;
  FunctionName "PreviewFileDialog::handleChange( WObject *, WEventData * )";
 @end;

 @begin UserFunction "Prototype for handleChange( WObject *, WEventData * )"
  Private 1;
  GencodeSrcLine 30;
  FunctionName "PreviewFileDialog::Prototype for handleChange( WObject *, WEventData * )";
 @end;

 @begin UserFunction "handleMessage( WCommonDialog *, WMessageHookEventData * )"
  Private 1;
  GencodeSrcLine 117;
  FunctionName "PreviewFileDialog::handleMessage( WCommonDialog *, WMessageHookEventData * )";
 @end;

 @begin UserFunction "Prototype for handleMessage( WCommonDialog *, WMessageHookEventData * )"
  Private 1;
  GencodeSrcLine 32;
  FunctionName "PreviewFileDialog::Prototype for handleMessage( WCommonDialog *, WMessageHookEventData * )";
 @end;

 @begin HPPPrefixBlock
@begin-code HPPPrefix

// Declarations added here will be included at the top of the .HPP file

@end-code;
  GencodeSrcLine 11;
 @end;

 @begin CPPPrefixBlock
@begin-code CPPPrefix

// Code added here will be included at the top of the .CPP file

//  Include definitions for resources.
#include "WRes.h"

@end-code;
  GencodeSrcLine 11;
 @end;

 @begin ClassContentsBlock
@begin-code ClassContents

    private:
        WPictureBox         *_previewBox;
        WRect               _previewRect;
        WLabel              *_previewLabel;

@end-code;
  GencodeSrcLine 18;
 @end;

@begin-code GeneratedClassContents


@end-code;

@begin-code Code "PreviewFileDialog::PreviewFileDialog()"

@@CLASSNAME@::@CLASSNAME@()
{
    _previewBox = NULL;
    _previewLabel = NULL;

    SetEventHandler( WCreateEvent, this,
                     (WEventHandler) handleCreate );
    if( GetStyle() & WFDSExplorer ) {
        SetEventHandler( WChangeEvent, this,
                         (WEventHandler) handleChange );
    } else {
        SetEventHandler( WMessageHookEvent, this,
                         (WEventHandler) handleMessage );
    }
}

@end-code;

@begin-code Code "PreviewFileDialog::Prototype for PreviewFileDialog()"

    public:
        @@CLASSNAME@();

@end-code;

@begin-code Code "PreviewFileDialog::~PreviewFileDialog()"

@@CLASSNAME@::~@CLASSNAME@()
{
    /*  Free memory associated with the preview box
    */
    if( _previewLabel ) {
        delete _previewLabel;
        _previewLabel = NULL;
    }
    if( _previewBox ) {
        delete _previewBox;
        _previewBox = NULL;
    }
}

@end-code;

@begin-code Code "PreviewFileDialog::Prototype for ~PreviewFileDialog()"

    public:
        ~@CLASSNAME@();

@end-code;

@begin-code Code "PreviewFileDialog::handleCreate( WObject *, WEventData * )"

WBool @CLASSNAME@::handleCreate( WObject *, WEventData * )
{
    WDialog     *dlg;
    WRect       r;
    WFont       font;
    float       hDLUToPixels;   // horizontal dialog units -> pixels conversion factor
    float       vDLUToPixels;   // vertical dialog units -> pixels conversion factor

    dlg = GetDialog();
    font = dlg->GetFont();
    hDLUToPixels = WApplication::GetDialogBaseWidth( font );
    vDLUToPixels = WApplication::GetDialogBaseHeight( font );

    /*  Create preview box
    */
    _previewBox = new WPictureBox;
    _previewBox->Create( dlg );
    _previewBox->ChangeStyle( WSSCenterImage, TRUE );
    _previewBox->ChangeExtendedStyle( WSExClientEdge, TRUE );

    /*  Size the picture box (all done in dialog units)
    */
    r.x = 280.0 * hDLUToPixels;
    r.y = 20.0 * vDLUToPixels;
    r.w = 68.0 * hDLUToPixels;
    r.h = 85.0 * vDLUToPixels;
    _previewBox->SetRectangle( r );
    _previewRect = r;

    /*  Put a label over the preview window
    */
    r.x = 280.0 * hDLUToPixels;
    r.y = 9.0 * vDLUToPixels;
    r.w = 68.0 * hDLUToPixels;
    r.h = 12.0 * vDLUToPixels;
    _previewLabel = new WLabel;
    _previewLabel->Create( dlg, r, "Preview:" );

    /*    Resize the dialog and center it.
    */
    r = dlg->GetRectangle( TRUE );
    r.w = _previewRect.x + _previewRect.w + 7.0 * hDLUToPixels;
    dlg->SetRectangle( r );
    dlg->Center();

    return FALSE;
}

@end-code;

@begin-code Code "PreviewFileDialog::Prototype for handleCreate( WObject *, WEventData * )"

    private:
        WBool handleCreate( WObject *, WEventData * );

@end-code;

@begin-code Code "PreviewFileDialog::handleChange( WObject *, WEventData * )"

WBool @CLASSNAME@::handleChange( WObject *, WEventData * )
{
    //  The definition of CDM_GETFILEPATH taken from windows.h
    #define CDM_GETFILEPATH         1125

    WDialog      *dlg;
    WLong        rc;
    WBitmap      bmp;
    char         buffer[ _MAX_PATH ];
    WMessage     msg( CDM_GETFILEPATH, _MAX_PATH, (WDWord)buffer );


    /*  Get the filename selected in the dialog. We do this by sending
        a message to the dialog.
    */
    dlg = GetDialog();
    rc = dlg->SendMessage( msg );
    if( _previewBox != NULL && rc > 0 ) {

        /*  Update the preview box
        */
        bmp.Create( buffer, FALSE );
        _previewBox->SetBitmap( bmp );
    }
    return FALSE;
}

@end-code;

@begin-code Code "PreviewFileDialog::Prototype for handleChange( WObject *, WEventData * )"

    private:
        WBool handleChange( WObject *, WEventData * );

@end-code;

@begin-code Code "PreviewFileDialog::handleMessage( WCommonDialog *, WMessageHookEventData * )"

WBool @CLASSNAME@::handleMessage( WCommonDialog *, WMessageHookEventData *event )
{
    int controlID, notifyCode, index;

    /*  NOTE: You don't get WChangeEvents if you're not using the
              explorer style of dialog, so we have to watch for
              messages from the files list box explicitly.
    */
    if( event->message.msg == 0x0111 /* WM_COMMAND */ ) {
        notifyCode = event->message.wParam >> 16;
        controlID = event->message.wParam & 0xffff;
        if( controlID == 0x460 /* control ID of the list box */ &&
            notifyCode == 0x1 /* LBN_SELCHANGE */ ) {
            WListBox    listBox;
            WString     fileName;
            WBitmap     bmp;

            listBox.AttachToWindow( (WWindowHandle)(event->message.lParam), FALSE );
            index = listBox.GetSelected();
            if( index != -1 ) {
                fileName = listBox.GetText( index );
                bmp.Create( fileName, FALSE );
                _previewBox->SetBitmap( bmp );
            }
            listBox.DetachFromWindow();
        }
    }
    return FALSE;
}

@end-code;

@begin-code Code "PreviewFileDialog::Prototype for handleMessage( WCommonDialog *, WMessageHookEventData * )"

    private:
        WBool handleMessage( WCommonDialog *,  WMessageHookEventData * );

@end-code;
@end;