I have a little C#/GTK# project that I have been working on that is presenting an interesting challenge to me. I have a traditional 3-tier architecture with GTK# presenting the UI, a pure C# problem domain (business layer), and a disk IO layer for the data access layer, since the app works with JPG photos on the file system. The main business class is Picture, and it has some properties that are displayed/edited at the UI level in Gtk.Entry and Gtk.TextView objects.
Thus far, I have been managing the edit of these Entry/TextView objects by capturing the existing Text value in the OnFocusInEvent and then comparing that captured string to the Text property of the Entry/TextView object in the OnFocusOutEvent. If they are not equal, then obviously a change was made, and I update the Picture objects property. Today, I recognized a problem with this strategy in that if the user clicks on the Gtk.MenuBar or the Gtk.Toolbar, the OnFocusOutEvent is not triggered. Thus updating the property on Picture does not occur, and the user may be clicking on the Save toolbar button or Save menu item. The only other property update strategy that I have been able to think of is to use the OnChanged event of the Entry/TextView.Buffer object. However, this event is fired everytime a character is typed or deleted. This seems like it would be firing off way too many events. The System.Windows.Forms.TextBox has a DataBindings property that can be used to set the datasource for a TextBox. Does anything like this exist for GTK#? Does anyone have another databinding strategy that they could suggest or point to with a URL? Thanks for any insights. -- View this message in context: http://www.nabble.com/Strategy-for-Databinding-Entry-to-Business-Object-Property-tp18080605p18080605.html Sent from the Mono - Gtk# mailing list archive at Nabble.com. _______________________________________________ Gtk-sharp-list maillist - Gtk-sharp-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/gtk-sharp-list
