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Docs: LCL/xmlpropstorage. Updates content in TCustomXMLPropStorage, TXMLPropStorage topics.
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@ -93,10 +93,52 @@ at:
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<element name="TCustomXMLPropStorage">
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<short>
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Implements the base class for the XML Form's Session Properties Storage.
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Implements the base class for XML storage of Form Session properties.
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</short>
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<descr/>
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<seealso/>
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<descr>
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<p>
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<var>TCustomXMLPropStorage</var> is a <var>TFormPropertyStorage</var>
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descendant used to save or restore properties values in an XML file. It
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introduces new properties, methods, and members needed to read or write values
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in an XML file.
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</p>
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<p>
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Values read or written using the class are defined in the SessionProperties for
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a TForm or a TFrame instance. At design-time, use the SessionProperties
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property editor in the Object Inspector to maintain the property names. At
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run-time, the property names can be assigned using a string like:
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</p>
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<code>
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Form1.SessionProperties := 'Width;Height;Image1.Width';
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</code>
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<p>
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Use the FileName property to specify where the XML content is stored.
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</p>
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<p>
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Use the RootNodePath property to specify the path to a node in the XML document
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where the XML content is stored.
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</p>
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<p>
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At run-time, default handler routines (attached to the parent form) are used to
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Save or Restore the content in the XML file when the form is created or
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destroyed.
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</p>
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<p>
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Use the StoredValues property to specify property names cannot be assigned
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using the Object Inspector; this may be needed for properties which cannot be
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represented as a singular value or does not have published visibility. Use the
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OnSaveProperties and OnRestoreProperties event handlers to store or restore the
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values for items in StoredValues.
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</p>
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<p>
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A demonstration program is located in the examples directory at:
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</p>
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<code>$(LazarusDir)/examples/propstorage</code>
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</descr>
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<seealso>
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<link id="TXMLPropStorage"/>
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<link id="#lcl.forms.TFormPropertyStorage">TFormPropertyStorage</link>
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</seealso>
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</element>
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<!-- private -->
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@ -116,8 +158,7 @@ Gets the value for the FileName property.
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</element>
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<element name="TCustomXMLPropStorage.GetXMLFileName.Result">
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<short>
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The current value in the
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<link id="#lcl.xmlpropstorage.TCustomXMLPropStorage.FileName">TCustomXMLPropStorage.FileName</link> property.
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The current value for the FileName property.
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</short>
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</element>
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@ -127,7 +168,7 @@ The current value in the
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.RootSection.Result">
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<short>The current value of RootSection.</short>
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<short>The current value for the RootSection property.</short>
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</element>
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<element name="TCustomXMLPropStorage.FixPath">
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@ -147,52 +188,47 @@ Turns '.' notation into '/' notation for the XPATH-like implementation in
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<element name="TCustomXMLPropStorage.XMLConfig">
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<short>
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Property to access the <link
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id="#lcl.xmlpropstorage.TPropStorageXMLConfig">TPropStorageXMLConfig</link>.
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Property to access the XML configuration file where the content is stored.
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</short>
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<descr/>
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<seealso/>
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<seealso>
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<link id="#lcl.xmlpropstorage.TPropStorageXMLConfig">TPropStorageXMLConfig</link>
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</seealso>
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</element>
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<element name="TCustomXMLPropStorage.StorageNeeded">
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<short>Ask the underlying storage object for an entry.</short>
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<short>Ensures the underlying storage object is allocated at run-time.</short>
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<descr/>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.StorageNeeded.ReadOnly">
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<short>If the item is read-only.</short>
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<short><b>True</b> if the item is read-only. Not used in the method.</short>
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</element>
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<element name="TCustomXMLPropStorage.FreeStorage">
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<short>Frees an entry from the underlying storage object.</short>
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<short>Frees the underlying storage object for the class instance.</short>
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<descr/>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.DoReadString">
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<short>
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Implements the actual reading of a value from the underlying storage
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container.
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Implements reading of a value from the underlying storage container.
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</short>
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<descr/>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.DoReadString.Result">
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<short>The value of the section/ident requested.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoReadString.Section">
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<short>The section to be read.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoReadString.Ident">
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<short>The ident to be read.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoReadString.TheDefault">
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<short>If has no value then return this as default.</short>
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<short>If no value is available then return this as the default value.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoWriteString">
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@ -202,15 +238,12 @@ Implements writing of a string value to the underlying storage container.
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<descr/>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.DoWriteString.Section">
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<short>The section to be written.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoWriteString.Ident">
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<short>The ident to be written.</short>
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</element>
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<element name="TCustomXMLPropStorage.DoWriteString.Value">
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<short>The value to be written.</short>
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</element>
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@ -220,7 +253,6 @@ Implements writing of a string value to the underlying storage container.
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<descr/>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.DoEraseSections.ARootSection">
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<short>The path to the section that will be erased.</short>
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</element>
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@ -229,21 +261,67 @@ Implements writing of a string value to the underlying storage container.
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<short>
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Name of the file where the property data is saved in XML format.
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</short>
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<descr/>
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<descr>
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<p>
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Defaults to the application name with a '.xml' extension if no value is
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specified in the property.
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</p>
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</descr>
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<seealso/>
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</element>
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<element name="TCustomXMLPropStorage.RootNodePath">
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<short>Name of the root object path on your XML file.</short>
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<descr/>
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<short>Name of the root object path in the XML file.</short>
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<descr>
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<p>
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Provides the name path to the XML node where the property values are stored in
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FileName.
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</p>
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</descr>
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<seealso/>
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</element>
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<element name="TXMLPropStorage">
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<short>
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Implements a class for XML Form Session Properties storage.
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Implements a class for XML storage of Form Session properties.
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</short>
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<descr/>
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<descr>
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<p>
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<var>TXMLPropStorage</var> is a <var>TCustomXMLPropStorage</var> descendant
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used to save or restore properties values using an XML file. It introduces new
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properties, methods, and members needed to read or write values in an XML file.
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</p>
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<p>
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Values read or written using the class are defined in the SessionProperties for
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a TForm or TFrame instance. At design-time, use the SessionProperties property
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editor in the Object Inspector to maintain the property names. At run-time, the
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property names can be assigned using a string like:
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</p>
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<code>
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Form1.SessionProperties := 'Width;Height;Image1.Width';
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</code>
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<p>
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Use the FileName property to specify where the XML content is stored.
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</p>
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<p>
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Use the RootNodePath property to specify the path to a node in the XML document
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where the XML content is stored.
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</p>
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<p>
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At run-time, default handler routines (attached to the parent form) are used to Save or Restore the content in the XML file.
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</p>
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<p>
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Use the StoredValues property to specify property names cannot be assigned
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using the Object Inspector; this may be needed for properties which cannot be
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represented as a singular value or does not have published visibility. Use the
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OnSaveProperties and OnRestoreProperties event handlers to store or restore the
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values for items in StoredValues.
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</p>
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<p>
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A demonstration program is located in the examples directory at:
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</p>
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<code>$(LazarusDir)/examples/propstorage</code>
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</descr>
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<seealso>
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<link id="#lcl.forms.TForm">TForm.SessionProperties</link>
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<link id="#lcl.inipropstorage.TINIPropStorage">TINIPropStorage</link>
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@ -513,10 +591,13 @@ Saves the content in XMLConfig to the specified TStream instance.
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<element name="Register">
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<short>
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Registers
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<link id="#lcl.xmlpropstorage.TXMLPropStorage">TXMLPropStorage</link> on the 'Misc' tab of the component palette.
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<link id="#lcl.xmlpropstorage.TXMLPropStorage">TXMLPropStorage</link>
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on the 'Misc' tab in the component palette.
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</short>
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<descr/>
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<seealso/>
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<seealso>
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<link id="#lcl.xmlpropstorage.TXMLPropStorage">TXMLPropStorage</link>
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</seealso>
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</element>
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</module>
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