John Torjo wrote:
Hajo Kirchhoff wrote:
I've written a new article explaining the interface. A behind the scenes look will follow shortly:
http://www.litwindow.com/Library/Articles/rapidui_article_3.htm
This sounds very nice in theory...
This is not a theory. Download the project, build it and try it yourself.
... But, please implement this: A dialog with - two edit boxes (width and height) - a check box (maintain_ratio)
If maintain_ratio is checked, whatever is typed on width is synchronized with height, and vice versa (they preserve the original ratio).
If maintain_ration is not checked, witdh and height can be modified independent of each-other.
This exists today in version 0.3.1: // please unwrap these lines BEGIN_RULES(dialog) RULE("eb_height.value", if_else(make_expr<bool>("cb_maintain_ratio.value"), make_expr<wxString>("eb_width.value"), make_expr<wxString>("eb_height.value")) RULE("eb_width.value", if_else(make_expr<bool>("cb_maintain_ratio.value"), make_expr<wxString>("eb_height.value"), make_expr<wxString>("eb_width.value")) END_RULES() It looks complicated because I am using C++ templates to specify rules that are lazily linked and evaluated only when a widget or data element changes its value. As the parser and named rules will be implemented next, the following will work next year... rule_editboxes { eb_height.value <=> eb_width.value // two way rule } rule_editboxes.enabled = cb_maintain_ratio.value The first rule links the edit boxes. The second rule enables the first rule when the checkbox is checked and disables when it is not checked. I don't have the time to write the example you suggest now, although it is a nice example. But perhaps the other two samples I've written already will suffice. Contained in the project (http://www.litwindow.com/library) you will find... The generic sample has a radiobox and an editcontrol. Whenever you change the radiobox, the value in the editcontrol gets updated and vice versa. The RssReader sample links a couple of listboxes and an html window together. When the user changes the selection of the rss channels list box, the headlines list box is updated automatically. When the user selects a different headline, the news item html window is updated automatically. Rules are headlines_listbox.items = channels_listbox.current.m_headlines newsitem_htmlwin.page = headlines_listbox.current.m_page Regards and thanks for sharing your thoughts. Hajo Kirchhoff http://www.litwindow.com/library