paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-04-20 12:39:31 +02:00
Code Issues Packages Projects Releases Wiki Activity

Docs: LCL/dbctrls. Adds missing topics.

Browse Source
This commit is contained in:
dsiders 2021-09-01 21:24:09 +01:00
parent acf31c45b6
commit 4ff5c00578
1 changed files with 55 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
docs/xml/lcl/dbctrls.xml
View File

@ -6233,6 +6233,61 @@
<link id="#lcl.controls.TControl.Visible">TControl.Visible</link>
</seealso>
</element>
<element name="TOnDBImageRead">
<short>
Specifies an event handler signalled to identify the graphic type for a database image.
</short>
<descr>
<p>
<var>TOnDBImageRead</var> is the type used for the <var>OnDBImageRead</var> property in <var>TDBImage</var>. It provides a mechanism for identifying the graphic class needed to load image content in the specified stream. In general, it is used when image data in S contains an additional header that must be processed / handled prior to reading the raw image data.
</p>
</descr>
<seealso>
<link id="TDbImage.OnDbImageRead"/>
<link id="TDbImage.LoadPicture"/>
</seealso>
</element>
<element name="TOnDBImageRead.Sender">
<short>
Object (TDBImage) instance for the event notification.
</short>
</element>
<element name="TOnDBImageRead.S">
<short>
Stream instance with the image data examined in the event handler.
</short>
</element>
<element name="TOnDBImageRead.GraphExt">
<short>
Returns the file extension used for the graphic type, or an empty string when not determined.
</short>
</element>
<element name="TOnDBImageWrite">
<short>
Event handler signalled when an image is written to the specified stream.
</short>
<descr>
<p>
<var>TOnDBImageWrite</var> is the type used for the <var>OnDbImageWrite</var> property in <var>TDBImage</var>.
</p>
</descr>
<seealso>
<link id="TDbImage.OnDbImageWrite"/>
<link id="TDbImage.UpdateData"/>
</seealso>
</element>
<element name="TOnDBImageWrite.Sender">
<short>Object (TDBImage) for the event notification.</short>
</element>
<element name="TOnDBImageWrite.S">
<short>Stream instance where the image is stored.</short>
</element>
<element name="TOnDBImageWrite.GraphExt">
<short>File extension associated with the image data.</short>
</element>
<element name="TDBImage">
<short>
<var>TDBImage </var>- a data-aware Image box to display a single image from a dataset.