Hi,
I have a suggestion for improving wxTreeListCtrl.
I wanted to add tool tips to a wxTreeListCtrl but had a little
trouble that I have since worked around. I want the tool tips to be
based on the item I'm hovering over.
To do this, I added a handler for mouse motion and am using HitTest
to figure out which item I'm hovering over.
There's a problem with this, though: the header. I needed a way to
account for the height of the header but m_headerHeight is a private
member.
My first change was to make a protected GetHeaderHeight() method.
Then in my OnMouseMotion handler I can do this:
wxPoint point (event.GetX(), event.GetY() + GetHeaderHeight());
wxTreeItemId item = HitTest (point);
Second, wxWindow::SetToolTip() doesn't work correctly since it's
really the main window that needs to handle the tool tip. So my
second change was to override wxTreeListCtrl::SetToolTip() and
have my function call m_main_win::SetToolTip().
Here's the whole function that I added to the end of treelistctrl.cpp:
void wxTreeListCtrl::SetToolTip (const wxString &tip)
{
m_main_win->SetToolTip (tip);
}
And here are the changes I made to the protected section of treelistctrl.h:
int GetHeaderHeight() const { return m_headerHeight; }
void SetToolTip (const wxString &tip);
This leads me to a final question: Why does wxTreeListCtrl have
public member functions GetHeaderWindow() and GetMainWindow()?
Since the classes they returned are only defined inside treelistctrl.cpp,
I don't see how they do me any good. I could have accomplished
both of the changes I suggest above if I could get at these classes,
but I cannot. Am I missing something obvious?
Thanks,
carl
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