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Document wxTR_LINES_AT_ROOT peculiar behaviour under MSW

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Without this style, expander button is not shown for the tree item
neither by the native control, so recommend always using it.

Closes #18201.
This commit is contained in:
Vadim Zeitlin
2018-08-25 22:33:57 +02:00
parent 3b75bce245
commit f9f82714db
1 changed files with 5 additions and 2 deletions
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7
interface/wx/treectrl.h
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@@ -42,8 +42,11 @@
flag is ignored under Windows unless you specify @c wxTR_NO_LINES as
well.)
@style{wxTR_LINES_AT_ROOT}
Use this style to show lines between root nodes. Only applicable if @c
wxTR_HIDE_ROOT is set and @c wxTR_NO_LINES is not set.
Use this style to show lines leading to the root nodes (unless no
@c wxTR_NO_LINES is also used, in which case no lines are shown). Note
that in the MSW version, if this style is omitted, not only the lines,
but also the button used for expanding the root item is not shown,
which can be unexpected, so it is recommended to always use it.
@style{wxTR_HIDE_ROOT}
Use this style to suppress the display of the root node, effectively
causing the first-level nodes to appear as a series of root nodes.