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Many programmers are interesting in splitter that using in dialogbox, so do I.
When I read the article General Purpose
Splitter Class written by Yurong
Lin, I got an idea to make my own classes.
Anyway, Lin‘s splitter is very good and easy to use, but it has some
limitation, such as: 1) do not support more than one pane on one side of the splitter; 2)
do not support vertical split; 3) no dragging restriction. Fortunately, it is not very
hard to add these features.
Here is the project I’v made, it was built with VC5.0 & MFC version 4.21.
Two classes are provided: CxSplitterWnd & CySplitterWnd, to use them, follow the
steps below:
1. Add the source files to your own project, they are xySplitterWnd.h &
xySplitterWnd.cpp .
2. Create an picture control in the dialog resource, this control will act as a
splitter afterward.
Set the type as Frame, move it to the appropriate position, then give
it an ID, such as IDC_XBAR1. One picture control for one splitter, you can make any number
of splitters as you like.
3. Declare the objects of CxSplitterWnd/CySplitterWnd in your dialog class.
Of course, you should include xySplitterWnd.h first.
CxSplitterWnd m_xSplitter1, m_xSplitter2; CySplitterWnd m_ySplitter;
4. Initiate the splitter objects in the InitDialog function.
m_xSplitter1.BindWithControl(this, IDC_XBAR1); // bind the splitter object to the puppet control m_xSplitter1.SetMinWidth(10, 50); // set the minimum width of the left/right pane m_xSplitter1.AttachAsRightPane(IDC_LEFTPANE1); // attach a control within the same dialogbox as a pane of the splitter m_xSplitter1.AttachAsRightPane(IDC_YBAR); // you can even attach another splitter as a pane m_xSplitter1.AttachAsRightPane(IDC_LEFTPANE2); m_xSplitter1.RecalcLayout();
5. Un-bind the splitter object with the puppet control when dialogbox is going to
close.
This step can be omitted when you do not want to re-use the splitter object.
m_xSplitter1.Unbind();
Just as Lin‘s work, there is a message "WM_SPLITTER_MOVED"
that generated by the splitter bar whenever the splitter is dragged then dropped. If you
want to do something special when the splitter is repositioned, then provide a message
handler for this message.
Last updated: 13. July 1998
