Click here to Skip to main content
Click here to Skip to main content

Standard file open dialog with preview

By , 28 Dec 1999
Rate this:
Please Sign up or sign in to vote.

Introduction

There is no custom hook function, just common MFC message maps. The dialog has a CDibStatic member, which displays the preview image when available. The CDibStatic class encapsulates a static control that displays images and is described in an article in the static controls section.

This is how the dialog looks like:

The template for the dialog is a normal developer studio dialog template. Note however, the use of the stc32 static control. As it hasn't any text in it, it is invisible unless you select it. This static control will serve as a place holder for the standard file dialog controls, thus establishing the position of the newly added controls in respect to the standards. If there is no stc32 control specified in the template, all the new controls will be placed below the standard controls. Otherwise, the common file dialog will look at the size of the stc32 control to attempt to fit all the standard controls in it. If it is not big enough, it is resized to make room for the standard controls, and then the new controls are repositioned with respect to the resized stc32 control.

Palette support is included within the dialog class. It is implemented using handlers for the WM_QUERYNEWPALETTE and WM_PALETTECHANGED Windows messages, so you have to ensure in your program that the dialog receives these messages. If the palette never changes, the image is painted with the right palette selected the first time. Since the standard dialogs are modal, the palette changes can be due only to other applications (unless you change it in another thread), thus realizing palette when gaining focus should always maintain the right colors. You can realize the palette at any time you wish by sending a WM_QUERYNEWPALETTE message to the CDibStatic control, for instance.

This class has been used (among other things) to implement a completely object oriented DIBLOOK.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

No Biography provided

Comments and Discussions

 
GeneralDoubts on VC++ DhtmlEdit Controll for IE5[Table insert,Paste html...] PinmemberRanjith.e.Nair15-Jul-02 23:09 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web01 | 2.8.140415.2 | Last Updated 29 Dec 1999
Article Copyright 1999 by Jorge Lodos
Everything else Copyright © CodeProject, 1999-2014
Terms of Use
Layout: fixed | fluid