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Docs: LCL/comctrls. Updates content in TCustomHeaderControl topics.

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* TCustomHeaderControl.OnSectionResize
* TCustomHeaderControl.OnSectionTrack
* TCustomHeaderControl.OnSectionSeparatorDblClick
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dsiders 2023-09-18 16:48:42 +01:00
parent fcefc7e2a1
commit f97e593d48
1 changed files with 88 additions and 11 deletions
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docs/xml/lcl/comctrls.xml
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@ -40760,34 +40760,111 @@ an unused part of the header control not covered by a header section.
</seealso>
</element>
<!-- TODO: Needs content and see also links. -->
<element name="TCustomHeaderControl.OnSectionResize">
<short>
Event handler signalled when a resize operation for a header section has been
completed.
</short>
<descr/>
<seealso/>
<descr>
<p>
<var>OnSectionResize</var> is a <var>TCustomSectionNotifyEvent</var> property
with the event handler signalled when one of the header Sections has been
resized by dragging the separator for the section. It is signalled (when
assigned) in the SectionResize method with arguments that identify the header
control and the header section for the event notification.
</p>
<p>
SectionResize / OnSectionResize occur when the left mouse button is released to
complete a resizing operation. An application can implement and assign a
handler routine using the signature in TCustomSectionNotifyEvent to perform
actions related to the resize event for the selected section.
</p>
<p>
Use OnSectionSeparatorDblClick to handle a mouse double-click event on the
section separator.
</p>
</descr>
<seealso>
<link id="TCustomHeaderControl.SectionResize"/>
<link id="TCustomHeaderControl.Sections"/>
<link id="TCustomHeaderControl.MouseUp"/>
<link id="TCustomHeaderControl.OnSectionSeparatorDblClick"/>
<link id="TCustomSectionNotifyEvent"/>
</seealso>
</element>
<!-- TODO: Needs content and see also links. -->
<element name="TCustomHeaderControl.OnSectionTrack">
<short>
Event handler signalled when drag tracking/resizing is activated for the
selected header section on the control.
</short>
<descr/>
<seealso/>
<descr>
<p>
<var>OnSectionTrack</var> is a <var>TCustomSectionTrackEvent</var> property
with the event handler signalled when resize tracking is activated for one of
the Sections on the header control. It is signalled (when assigned) from the
SectionTrack method. The event occurs when MouseDown, MouseMove, and MouseUp
methods handle Shift+Left mouse button events on the control.
</p>
<p>
An application can implement and assign a handler routine using the signature
in TCustomSectionTrackEvent to perform actions related to the resize tracking
operation. Arguments passed to the handler routine include the header control
and the header section for the notification. The Width and tracking state for
the section are also included.
</p>
<p>
Use OnSectionResize to performs action needed when a resize operation has been
completed for one of the header Sections.
</p>
<p>
Use OnSectionSeparatorDblClick to perform actions when the separator for a
header section is double-clicked.
</p>
</descr>
<seealso>
<link id="TCustomHeaderControl.Sections"/>
<link id="TCustomHeaderControl.SectionTrack"/>
<link id="TCustomHeaderControl.MouseDown"/>
<link id="TCustomHeaderControl.MouseMove"/>
<link id="TCustomHeaderControl.MouseUp"/>
<link id="TCustomHeaderControl.OnSectionResize"/>
<link id="TCustomHeaderControl.OnSectionSeparatorDblClick"/>
</seealso>
</element>
<!-- TODO: Needs content and see also links. -->
<element name="TCustomHeaderControl.OnSectionSeparatorDblClick">
<short>
Event handler signalled when a separator between header sections on the
control is double-clicked.
</short>
<descr/>
<seealso/>
<descr>
<p>
<var>OnSectionSeparatorDblClick</var> is a <var>TCustomSectionNotifyEvent</var>
property with the event handler signalled when the separator for a header
section has been double-clicked. It is signalled (when assigned) from the
SectionSeparatorDblClick method. It occurs when the DblClick method handles the
mouse event when resize tracking has been enabled by hovering the mouse over
the separator for the section.
</p>
<p>
An application can implement and assign a routine using the signature in
TCustomSectionNotifyEvent to respond to the event notification. Arguments
passed to the handler include the header control and the header section
affected in the event.
</p>
<p>
Use OnSectionTrack and OnSectionResize to perform actions needed then resize
tracking is activated or completed.
</p>
</descr>
<seealso>
<link id="TCustomHeaderControl.Sections"/>
<link id="TCustomHeaderControl.DblClick"/>
<link id="TCustomHeaderControl.OnSectionTrack"/>
<link id="TCustomHeaderControl.OnSectionResize"/>
<link id="TCustomSectionNotifyEvent"/>
</seealso>
</element>
<element name="TCustomHeaderControl.OnCreateSectionClass">
@ -40937,7 +41014,7 @@ Represents the selection changing notification message for tab controls.
</element>
<element name="CompareExpandedNodes">
<short>Function to compare the node text in two nodes.</short>
<short>Function to compare the node text in two tree nodes.</short>
<descr>
<p>
This function does an ANSICompare on the NodeText of two nodes. The
@ -40972,7 +41049,7 @@ The nodetext from the first node is higher than the nodetext from the second.
<element name="CompareTextWithExpandedNode">
<short>
Function to compare the given text with the nodetext of the specified node.
Function to compare the given text with the nodetext of the specified tree node.
</short>
<descr>
<p>