This document covers the following topics:

• A Simple Example

• Selecting Rows in a TEXTGRID2

• Triggering Adapter Methods when Selecting a Row

• TEXTGRID2 Properties

• COLUMN Properties

• Dynamic Setting of Text Styles in TEXTGRID2

• Example: Displaying an ASCII Protocol

• Example: Using Images inside the TEXTGRID2 Control

• Specifying the Width of a TEXTGRID2 Control

• Change Index Management

• Flexible Columns with CSVCOLUMN

• CSVCOLUMN Properties

---

A Simple Example

The following example shows a TEXTGRID2 control:

There are two columns which hold data. There is one column at the very left which displays a selection icon - in addition to a yellow background for a selected line. Even and odd lines are displayed in slightly different colors. At the very right of each title column, there is a symbol which indicates the sorting status; if you double-click on this symbol, the column is sorted first in ascending direction and, when clicking again, in descending direction. Change the sequence of columns by dragging the title of a column and dropping it on another column's title. Depending from where you drop, the column is either moved left or right.

The asterisk in the upper left corner of the grid is used to select/deselect all lines in the grid. The behavior depends on the setting of the singleselect property which determines whether multiple lines can be selected in the grid (default) or whether only one line can be selected:

• Multiple Line Selection Mode
  When you choose the asterisk for the first time, all lines are selected. When you choose the asterisk a second time, all lines are deselected.

• Single Line Selection Mode
  When you choose the asterisk (no matter how often), an existing selected line is deselected.

The XML layout definition is:

<rowarea name="Textgrid">
    <itr takefullwidth="true" fixlayout="true">
        <textgrid2 griddataprop="lines" width="100%" height="200" selectprop="selected"
                   hscroll="true">
            <column name="First Name" property="firstName" width="50%">
            </column>
            <column name="Last Name" property="lastName" width="50%">
            </column>
        </textgrid2>
    </itr>
    <vdist height="5">
    </vdist>
</rowarea>

The TEXTGRID2 definition is bound to a grid data property lines. This is a special collection that mirrors the server data. Technically, it is treated in the same way as a normal collection. It supports the Collection and List interface.

Inside the TEXTGRID2 control definition there are two columns. These columns are bound to the properties firstName and lastName.

This is the Java adapter source:

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.SelectableLine;
import com.softwareag.cis.server.util.TEXTGRIDCollection;

// This class is a generated one.

public class TextGridAdapter
    extends Adapter
{
    // class >LinesItem<
    public class LinesItem
    extends SelectableLine
    {
        // property >firstName<
        String m_firstName;
        public String getFirstName() { return m_firstName; }

        // property >lastName<
        String m_lastName;
        public String getLastName() { return m_lastName; }

        // property >selected<
        boolean m_selected;
        public boolean getSelected() { return m_selected; }
        public void setSelected(boolean value) { m_selected = value; }
    }

    // property >lines<
    TEXTGRIDCollection m_lines = new TEXTGRIDCollection();
    public TEXTGRIDCollection getLines() { return m_lines; }

    /** initialisation - called when creating this instance*/
    public void init()
    {
        for (int i=0; i< 50; i++)
        {
            LinesItem l = new LinesItem();
            l.m_firstName = "First " + i;
            l.m_lastName = "Last " + i;
            m_lines.add(l);
        }
    }
}

The adapter class provides a property lines. This property returns an instance of the class TEXTGRIDCollection which itself is a special collection and comes with the Application Designer runtime. The instance is filled in the init() method of the adapter - just as a normal collection. But it automatically brings in all the functions for sorting and - if desired - server-side scrolling (see the TEXTGRIDSSS2 description).

The collection is filled with objects of the inner class Line. Each object supports a property firstName, lastName and selected. (The class Line is an inner class in the example - but of course it could also be a normal class). Make sure to make the class publicly accessible, because the Application Designer runtime requires public access to the corresponding properties.

The whole TEXTGRID2 definition is bound by the griddataprop property to the lines collection - and each COLUMN definition is bound to a property of class Line, i.e. the class representing elements of the collection.

Selecting Rows in a TEXTGRID2

Maybe you wonder why there is a selected property in the class Line of the previous example.

This property is required for indicating which lines are currently selected and which are not. Each line which is displayed in the TEXTGRID2 control is represented at the server side by an object of the class Line. Therefore, the selection status of the grid (which lines are selected and which lines are not) is mirrored by the corresponding selected property of each line.

The code below shows an extension of the previous example. It demonstrates how to build a method for taking the line selection into consideration.

Below the TEXTGRID2 definition, there is a button that triggers a method for removing the selected lines.

The XML layout definition is improved in the following way:

<rowarea name="Textgrid">
    <itr takefullwidth="true" fixlayout="true">
        <textgrid2 griddataprop="lines" width="100%" height="200" selectprop="selected"
                   hscroll="true">
            <column name="First Name" property="firstName" width="50%">
            </column>
            <column name="Last Name" property="lastName" width="50%">
            </column>
        </textgrid2>
    </itr>
    <vdist height="5">
    </vdist>
    <itr>
        <button name="Remove Selected Items" method="onRemoveSelectedItems">
        </button>
    </itr>
    <vdist>
    </vdist>
</rowarea>

Note that inside the TEXTGRID2 definition, there is a property selectprop that points to the name of the item property used for storing the selection information accordingly.

The method onRemoveSelectedItems was added into the adapter code of the previous example:

public void onRemoveSelectedItems()
{
    for (int i=m_lines.size()-1; i>=0; i--)
    {
    LinesItem l = (LinesItem)m_lines.get(i);
    if (l.getSelected() == true)
    m_lines.remove(i);
}

The collection is iterated from its last element to its first. All elements which hold a selected property with value "true" are removed.

Triggering Adapter Methods when Selecting a Row

In the previous section, you saw how to manage selections inside a TEXTGRID2 control. Sometimes, you want to trigger a certain function when selecting a row - maybe you want to react directly to the selected item.

To do so, you can use some additional properties inside the TEXTGRID2 definition:

• The onclickmethod property is used to point to a method of your adapter class which is called when a click event occurs.

• The ondblclickmethod property is used when the user double-clicks a grid row.

You can use "direct triggering of method" together with single line selection mode or with multiple line selection mode. In case of using it with multiple line selection, you have to find out which was the "last selected index", i.e. the line index of the clicked/double-clicked line.

There is a property lastselectedprop inside the TEXTGRID2 definition. Using this definition, you can bind the value to an integer property of your adapter class. The index value which is selected is passed into this property.

TEXTGRID2 Properties

Basic
griddataprop	Name of adapter property that represents the grid on server side. The property must be of type "TEXTGRIDCollection". var m_items = new TEXTGRIDCollection() Pay attention: once you have created an instance of TEXTGRIDCollection inside your adapter always exactly use this one instance. Do not re-instantiate collection objects! - Example: Instead of... WRONG: m_items = new TEXTGRIDCollection(); ...use... CORRECT: m_items.clear();	Obligatory
width	Width of the control. There are three possibilities to define the width: (A) You do not define a width at all. In this case the width of the control will either be a default width or - in case of container controls - it will follow the width that is occupied by its content. (B) Pixel sizing: just input a number value (e.g. "100"). (C) Percentage sizing: input a percantage value (e.g. "50%"). Pay attention: percentage sizing will only bring up correct results if the parent element of the control properly defines a width this control can reference. If you specify this control to have a width of 50% then the parent element (e.g. an ITR-row) may itself define a width of "100%". If the parent element does not specify a width then the rendering result may not represent what you expect.	Obligatory	100 120 140 160 180 200 50% 100%
height	Height of the control. There are three possibilities to define the height: (A) You do not define a height at all. As consequence the control will be rendered with its default height. If the control is a container control (containing) other controls then the height of the control will follow the height of its content. (B) Pixel sizing: just input a number value (e.g. "20"). (C) Percentage sizing: input a percentage value (e.g. "50%"). Pay attention: percentage sizing will only bring up correct results if the parent element of the control properly defines a height this control can reference. If you specify this control to have a height of 50% then the parent element (e.g. an ITR-row) may itself define a height of "100%". If the parent element does not specify a width then the rendering result may not represent what you expect.	Obligatory	100 150 200 250 300 250 400 50% 100%
comment	Comment without any effect on rendering and behaviour. The comment is shown in the layout editor's tree view.	Optional
Selection
selectableprop	Name of the adapter parameter used for selectable property for the textgrid(textgridsss) control.	Optional
selectprop	Name of property of the item objects - representing the individual rows of the text grid - that is used for selecting rows. Must be of type "boolean"/ "Boolean". If the user selects a text grid row then the value "true" is passed into the corresponding row object's property.	Optional
singleselect	If set to "true" then only one row can be selected inside the text grid. - If set to "false" then multiple lines can be selected by using Ctrl- and Shift-key during mouse selection. Default is "false".	Optional	true false
singleselectprop	Name of adapter property that dynamically defined whether SINGLESELECT is true or false. Must return 'true' or 'false'.	Optional
onclickmethod	Adapter method that is called when the user selects a row. Inside the adapter you can find the selected rows by iterating through the row objects and finding out which one's selection-property is switched to "true". In case of multiple row selection you can also use the method "findLastSelectedItem()" of your corresponding TEXTGRIDCollection object.	Optional
ondblclickmethod	Adapter method that is called when the user selects a row by a double click. Inside the adapter you can find the selected rows by iterating through the row objects and finding out which one's selection-property is switched to "true". In case of multiple row selection you can also use the method "findLastSelectedItem()" of your corresponding TEXTGRIDCollection object.	Optional
withselectioncolumn	When defining a SELECTPROP property then automatically a selection column is added as first left column of the grid. Inside the column an icon inidicates if a row is currently selected. Set this property to "false" in order to avoid the selection column.	Optional	true false
withselectioncolumnicon	Flag that indicates whether the selection column shows a "select all" icon on top. Default is true.	Optional	true false
fgselect	if switched to true then an additional "graying" of selected lines will be activated. Switch this property to "true" if you have coloured textgrid cells: the selection colour will not override the colour of each cell, as consequence you require an additional effect in order to make the user see which row is selected.	Optional	true false
focusedprop	Name of property of the item objects - representing the individual rows of the text grid - that indicates if the line should receive focus. Must be of type "boolean"/ "Boolean".	Optional
focusable	Set this to TRUE if you want the browser to treat the grid like a focusable element (like buttons and input elements) when the page is loaded. Example usage: When your grid is the first focusable element the browser will automatically set the focus on the grid when the page is loaded.	Optional	true false
gridfocusedprop	Name of the property that indicates if the grid should receive the focus. It is automatically reset after the server-roundtrip.	Optional
Right Mouse Button
oncontextmenumethod	If clicking on a row of the text grid with the right mouse button then always the method "reactOnContexMenuRequest()" is called inside the corresponding row item object (that itself is kept inside the TEXTGRIDCollection object). If the user clicks with the right mouse button onto an empty area of the grid then there is no object to call - instead the adapter method that is specified by this property is called.	Optional
singleselectcontextmenu	With SHIFT and CTRL key the user can select multiple lines (use property SINGLESELECT to suppress this feature). Use this property to ensure that the context menu is requested only for a single line. Default is "false".	Optional	true false noselection
enabledefaultcontextmenu	Use this property to enable the default context menu of the browser within the textgrid. Please note: do not enable the browser's context menu if your application itself provides for a context menu. Default is "false".	Optional	true false
Appearance
width	(already explained above)
height	(already explained above)
minapparentrows	Number of rows that are displayed independent of the size of the server side collection.	Optional	1 2 3 int-value
hscroll	Definition of the horizontal scrollbar's appearance. You can define that the scrollbars only are shown if the content is exceeding the control's area ("auto"). Or scrollbars can be shown always ("scroll"). Or scrollbars are never shown - and the content is cut ("hidden"). Default is "auto".	Sometimes obligatory	auto scroll hidden
withtitlerow	If defined as "false" then no top title row is shown. "True" is default.	Optional	true false
colspan	Column spanning of control. If you use TR table rows then you may sometimes want to control the number of columns your control occupies. By default it is "1" - but you may want to define the control to span over more than one columns. The property only makes sense in table rows that are snychronized within one container (i.e. TR, STR table rows). It does not make sense in ITR rows, because these rows are explicitly not synched.	Optional	1 2 3 4 5 50 int-value
rowspan	Row spanning of control. If you use TR table rows then you may sometimes want to control the number of rows your control occupies. By default it is "1" - but you may want to define the control to span over more than one columns. The property only makes sense in table rows that are snychronized within one container (i.e. TR, STR table rows). It does not make sense in ITR rows, because these rows are explicitly not synched.	Optional	1 2 3 4 5 50 int-value
personalizable	If defined to "false" then no re-arranging of columns is offered to the user. Default is "true". This means: if using COLUMN controls inside the grid definition then the user can re-arrange the sequence of columns by dragging and dropping them within the top title row.	Optional	true false
stylevariant	Some controls offer the possibility to define style variants. By this style variant you can address different styles inside your style sheet definition file (.css). If not defined "normal" styles are chosen, if defined (e.g. "VAR1") then other style definitions (xxxVAR1xxx) are chosen. Purpose: you can set up style variants in the style sheet defintion and use them multiple times by addressing them via the "stylevariant" property. CIS currently offers two variants "VAR1" and "VAR2" but does not predefine any semantics behind - this is up to you!	Optional	VAR1 VAR2
stylevariantprop	Name of the adapter property which dynamically defines the STYLEVARIANT value at runtime.	Optional	VAR1 VAR2
backgroundstyle	CSS style definition that is directly passed into this control. With the style you can individually influence the rendering of the control. You can specify any style sheet expressions. Examples are: border: 1px solid #FF0000 background-color: #808080 You can combine expressions by appending and separating them with a semicolon. Sometimes it is useful to have a look into the generated HTML code in order to know where direct style definitions are applied. Press right mouse-button in your browser and select the "View source" or "View frame's source" function.	Optional
vscroll	Definition of the vertical scrollbar's appearance. You can define that scrollbars only are shown if the content is exceeding the control's area ("auto"). Or scrollbars can be shown always ("scroll"). Or scrollbars are never shown - and the content is cut ("hidden"). Default is "scroll".	Optional	auto scroll hidden
withrollover	The textgrid controls provide for a so called "roll over" effect. The row that is currently below the mouse pointer is highlighted in a certain way. Use this property to disable the roll over effect (Default is TRUE).	Optional	true false
fixedcolumnsizes	When switching the FIXEDCOLUMNSIZES property to value "true" then internally the grid is arranged in a way that the area always determines its size out of the width specification of the COLUMN controls. The browser does not look into the column contents in order to try to optimise the size of the area - but always follows the width that you define.	Optional	true false
requiredheight	Minimum height of the control in pixels. Use this property to ensure a minimum height if the overall control's height is a percentage of the available space - i.e. if value of property HEIGHT is a percentage (e.g. 100%). Please note:You must not use FIXLAYOUT at the surrounding row container (ITR and ROWAREA). Otherwise: if the available space is less than the required height the end of the control is just cut off.	Optional	1 2 3 int-value
disablecolumnresizing	Flag that indicates if the user can change the width of the grid columns. Default is false.	Optional	true false
disablecolumnmoving	Flag that indicates if the user can change the order of grid columns. Default is false.	Optional	true false
tabindex	Index that defines the tab order of the control. Controls are selected in increasing index order and in source order to resolve duplicates.	Optional	-1 0 1 2 5 10 32767
Drag And Drop
draginfoprop	Name of the row item property that passes back the line's "drag info". When using this attribute the grid lines can be dragged onto "drop targets" (e.g. DROPICON control). The dragged line is identified by its "drag info". Use any string/information applicable.	Optional
Miscellaneous
testtoolid	Use this attribute to assign a fixed control identifier that can be later on used within your test tool in order to do the object identification	Optional
Deprecated
directselectevent	Use ONCLICKMETHOD and ONDBLCLICKMETHOD instead.	Optional	ondblclick onclick
directselectmethod	Use ONCLICKMETHOD and ONDBLCLICKMETHOD instead.	Optional

COLUMN Properties

The COLUMN tag is the typical tag that is placed inside a TEXTGRID2 definition. The COLUMN definition defines a column with its binding to a property of the collection elements.

Basic
name	Text that is displayed inside the control. Please do not specify the name when using the multi language management - but specify a "textid" instead.	Sometimes obligatory
textid	Multi language dependent text that is displayed inside the control. The "textid" is translated into a corresponding string at runtime. Do not specify a "name" inside the control if specifying a "textid".	Sometimes obligatory
property	Property of the row item object that represents the column's content. The content typically is straight text but can also be "complex HTML".	Obligatory
width	Width of the control. There are two possibilities to define the width: (A) Pixel sizing: just input a number value (e.g. "100"). (B) Percentage sizing: input a percentage value (e.g. "50%"). Pay attention: percentage sizing will only bring up correct results if the parent element (textgrid2, textgridsss2) of the control properly defines a width this control can reference.	Obligatory	100 120 140 160 180 200 50% 100%
comment	Comment without any effect on rendering and behaviour. The comment is shown in the layout editor's tree view.	Optional
Appearance
datatype	By default, the control is managing its content as string. By explicitly setting a datatype you can define that the control will format the data coming from the server: if the field has datatype "date" and the user inputs "010304" then the input will be translated into "01.03.2004" (or other representation, dependent on date format settings). Please note: the datatype "float" is named a bit misleading - it represents any decimal format number. The server side representation may be a float value, but also can be a double or a BigDecimal property.	Optional	date float int long time timestamp color xs:decimal xs:double xs:date xs:dateTime xs:time ------------------------ N n.n P n.n string n L xs:boolean xs:byte xs:short
align	Horizontal alignment of the control's content. Default is "center".	Optional	left center right
straighttext	If the text of the control contains HTML tags then these are by default interpreted by the browser. Specifiying STRAIGHTTEXT as "true" means that the browser will directly render the characters without HTML interpretation. Example: if you want to output the source of an HTML text then STRAIGHTTEXT should be set to "true".	Optional	true false
convertspaces	If switched to "true" then all spaces inside the text that is rendered into the column are converted to non breakable spaces. Use this option if you have "meaningful" spaces inside the values you return from the server adapter object, e.g. if outputting some ASCII protocol inside a column.	Optional	true false
cuttextline	If switched to "false" then the content of the column is broken if it excceeds the column's width definition. Default is "true" i.e. if the content is too big for the column cell then it is cut.	Optional	true false
withsorticon	Flag that indicates if a small sort indicator is shown within the right corner of the control. Default is TRUE.	Optional	true false
headerimage	URL of image that is displayed inside the control. Any image type (.gif, .jpg, ...) that your browser does understand is valid. Use the following options to specify the URL: (A) Define the URL relative to your page. Your page is generated directly into your project's folder. Specifiying "images/xyz.gif" will point into a directory parallel to your page. Specifying "../HTMLBasedGUI/images/new.gif" will point to an image of a neighbour project. (B) Define a complete URL, like "http://www.softwareag.com/images/logo.gif".	Optional
headernowrap	The textual content of the header is not wrapped automatically. No line break will be performed automatically by the browser. If you want the text of the header to be wrapped, set the value to "false".	Optional	true false
Binding
property	(already explained above)
textstyleprop	Name of the property of the row item object that passes back a style-string that is used for rendering the column's content. As consequence you can indiviudally assign a CSS-style to each cell of your text grid.	Optional
textclassprop	Name of the property of the row item object that defines a style class to be used for rendering the content. You can set up a limited number of style classes inside your style sheet definition - and dynamically reference them per grid cell.	Optional
imageprop	Name of the property of the row item object passing back an image URL. The image is rendered at the very left of the column's area - in front of the text (PROPERTY property definition).	Optional
linkmethod	Name of a method within the row item object that is called if user clicks the column's text.	Optional
celllinkmethodprop	Name of the row item property that passes back the name of a method or null. If the method name is not null then the corresponding column (cells) will show the text as method link. On click the provided row item cell method is called.	Optional
celltitleprop	Name of the property of the row item object that passes back the tooltip of this cell.	Optional
Online help
title	Text that is shown as tooltip for the control. Either specify the text "hard" by using this TITLE property - or use the TITLETEXTID in order to define a language dependent literal.	Optional
titletextid	Text ID that is passed to the multi lanaguage management - representing the tooltip text that is used for the control.	Optional
sorttitle	Text that is shown as tooltip for the sort indicator. Either input text by using this SORTTITLE property - or use the SORTTITLETEXTID in order to define a language dependent literal.	Optional
sorttitletextid	Text ID that is passed to the multi lanaguage management - representing the tooltip text for the sort indicator.	Optional
celltitleprop	(already explained above)

Dynamic Setting of Text Styles in TEXTGRID2

The example from the previous sections will now be enhanced in order to demonstrate how to control the style of cells inside a TEXTGRID2 control dynamically:

Some of the cells in the TEXTGRID2 control are rendered with a different style than the normal one. Each COLUMN definition has the property textstyleprop:

<rowarea name="Textgrid">
    <itr takefullwidth="true" fixlayout="true">
        <textgrid2 griddataprop="lines" width="100%" height="200" selectprop="selected"
                   hscroll="true">
            <column name="First Name" property="firstName" width="50%"
                    textstyleprop="firstNameStyle">
            </column>
            <column name="Last Name" property="lastname" width="50%"
                    textstyleprop="lastNameStyle">
            </column>
        </textgrid2>
    </itr>
    <vdist height="5">
    </vdist>
    <itr>
        <button name="Remove Selected Items" method="onRemoveSelectedItems">
        </button>
    </itr>
</rowarea>

The referenced property inside the COLUMN definition is on the same level as the normal property that is responsible for the content of the columns and which is referenced by the normal property property. Have a look at the Java source:

// This class is a generated one.

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.SelectableLine;
import com.softwareag.cis.server.util.TEXTGRIDCollection;

// This class is a generated one.

public class TextGridAdapter
    extends Adapter
{
    // class >LinesItem<
    public class LinesItem
    extends SelectableLine
    {
        // property >firstName<
        String m_firstName;
        public String getFirstName() { return m_firstName; }

        // property >lastName<
        String m_lastName;
        public String getLastName() { return m_lastName; }

        // property >selected<
        boolean m_selected;
        public boolean getSelected() { return m_selected; }
        public void setSelected(boolean value) { m_selected = value; }

        // property >firstNameStyle<
        String m_firstNameStyle;
        public String getFirstNameStyle() { return m_firstNameStyle; }
        public void setFirstNameStyle(String value) { m_firstNameStyle = value; }

        // property >lastNameStyle<
        String m_lastNameStyle;
        public String getLastNameStyle() { return m_lastNameStyle; }
        public void setLastNameStyle(String value) { m_lastNameStyle = value; }
    }

    // property >lines<
    TEXTGRIDCollection m_lines = new TEXTGRIDCollection();
    public TEXTGRIDCollection getLines() { return m_lines; }

    ...

    /** initialisation - called when creating this instance*/
    public void init()
    {
        for (int i=0; i< 50; i++)
        {
        LinesItem l = new LinesItem();
        l.m_firstName = "First " + i;
        l.m_lastName = "Last " + i;
        if (i%3 == 2)
            l.setFirstNameStyle("color: #FF0000;");
        if (i%4 == 3)
            l.setLastNameStyle("color: #0000FF; background-color: #C0C0C0");
        m_lines.add(l);
        }
    }
}

The properties lastNameStyle and firstNameStyle are available on item level. They are filled in the init() method.

Example: Displaying an ASCII Protocol

The following example shows the output of an ASCII protocol. The example demonstrates the usage of the COLUMN properties textstyleprop and convertspaces.

The XML layout definition looks as follows:

<page model="Ascii_Protocol_Adapter">
    <titlebar name="ASCII Protocol">
    </titlebar>
    <header withdistance="false">
        <button name="Save">
        </button>
    </header>
    <pagebody>
        <rowarea name="Protocol Output">
            <itr takefullwidth="false" height="350" fixlayout="true">
                <textgrid2 griddataprop="items" width="100%" height="100%" hscroll="true"
                           vscroll="true" backgroundstyle="background-color:#000000">
                    <column name="Protocol" property="protocolText" width="1000"
                            textstyleprop="protocolStyle" convertspaces="true">
                    </column>
                </textgrid2>
            </itr>
        </rowarea>
    </pagebody>
    <statusbar withdistance="false">
    </statusbar>
</page>

The following is defined in the above layout definition:

• Inside the TEXTGRID2 definition, a black background is defined (backgroundstyle property).

• Inside the COLUMN definition, a style property is referenced (textstyleprop property).

• Inside the COLUMN definition, the property convertspaces is set to "true".

The Java source looks as follows:

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.TEXTGRIDCollection;

// This class is a generated one.

public class Ascii_Protocol_Adapter
    extends Adapter
{
    // ------------------------------------------------------------------------
    // inner classes
    // ------------------------------------------------------------------------

    // class >ItemsItem<
    public class Item
    {
        // property >protocolStyle<
        String m_centralStyle = "font-family: courier; color: #00FFFF; background-color: #000000;";
        String m_protocolStyle;
        public String getProtocolStyle() { return m_centralStyle; }

        // property >protocolText<
        String m_protocolText;
        public String getProtocolText() { return m_protocolText; }
        public void setProtocolText(String value) { m_protocolText = value; }
    }
    // ------------------------------------------------------------------------
    // property access
    // ------------------------------------------------------------------------

    // property >items<
    TEXTGRIDCollection m_items = new TEXTGRIDCollection();
    public TEXTGRIDCollection getItems() { return m_items; }

    // ------------------------------------------------------------------------
    // standard adapter methods
    // ------------------------------------------------------------------------

    /** initialisation - called when creating this instance*/
    public void init()
    {
        Item item;
        item = new Item(); item.setProtocolText("BATCH RUN (01.04.2002)"); m_items.add(item);
        item = new Item(); item.setProtocolText("======================"); m_items.add(item);
        item = new Item(); item.setProtocolText(""); m_items.add(item);
        item = new Item(); item.setProtocolText("Time consuumed : 48.000 ms");
        m_items.add(item);
        item = new Item(); item.setProtocolText("Waiting time : 3.452 ms");
        m_items.add(item);
        item = new Item(); item.setProtocolText("Database time : 32.203 ms");
        m_items.add(item);
        item = new Item(); item.setProtocolText("App Server time : 10.485 ms");
        m_items.add(item);
        item = new Item(); item.setProtocolText(""); m_items.add(item);
        item = new Item(); item.setProtocolText("Return Code : 0 (OK)"); m_items.add(item);
    }
}

Example: Using Images inside the TEXTGRID2 Control

In the following text grid, graphical information and text information are mixed:

The layout definition looks as follows:

<rowarea name="Textgrid with contained Icons">
    <itr takefullwidth="tue">
        <textgrid2 griddataprop="lines" width="100%" height="200">
            <column name="Icon" width="53" imageprop="iconURL">
            </column>
            <column name="Text" property="text" width="100%">
            </column>
        </textgrid2>
    </itr>
</rowarea>

In the definition of the left column, the property imageprop is used to reference to a property that provides the URL string of the image to be displayed. The definition of the right column contains the property property that points to a property providing text information.

The adapter class looks as follows:

// This class is a generated one.

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.TEXTGRIDCollection;

public class Textgrid_02_Adapter
    extends Adapter
    {
    // ------------------------------------------------------------------------
    // inner classes
    // ------------------------------------------------------------------------
    // class >LinesItem<
    public class LinesItem
    {
        // property >iconURL<
        String m_iconURL;
        public String getIconURL() { return m_iconURL; }
        public void setIconURL(String value) { m_iconURL = value; }

        // property >text<
        String m_text;
        public String getText() { return m_text; }
        public void setText(String value) { m_text = value; }
    }
    // ------------------------------------------------------------------------
    // property access
    // ------------------------------------------------------------------------
    // property >lines<
    TEXTGRIDCollection m_lines = new TEXTGRIDCollection();
    public TEXTGRIDCollection getLines() { return m_lines; }

    // ------------------------------------------------------------------------
    // standard adapter methods
    // ------------------------------------------------------------------------
   /** initialisation - called when creating this instance*/
    public void init()
    {
        for (int i=0; i<10; i++)
        {
        LinesItem l = new LinesItem();
        l.setIconURL("images/touch_"+i+".gif");
        l.setText("This is icon number " + i);
        m_lines.add(l);
        }
    }

You can also mix text and image by specifying the property and the imageprop property. In this case, the image will be drawn on the left and the text will be placed to the right of the image.

Specifying the Width of a TEXTGRID2 Control

The sizing of text grids was improved with a previous release: now you can simply set a width of e.g. "100%" if the text grid should cover the complete width that is available.

Pay attention to the following:

• If you do not specify a width inside the TEXTGRID2 definition, the width of the grid will be as wide as defined by its content. Of course, it does not make sense to define a percentage value inside the COLUMN definitions - there is nothing to refer to.

• If you specify a width in the TEXTGRID2 and you already know that the size of the columns does not fit into the given width, you must set the flag HSCROLL to "true". Otherwise, there will be no scrolling at all and the grid will be rendered as wide as required by its content.

• If you specify a percentage value as a width for the TEXTGRID2 control, you must place the grid into an ITR definition that itself has also a WIDTH definition (typically of "100%"). In addition, you must set the flag FIXLAYOUT to "true" on ITR level. Otherwise the grid will follow the width of its contained columns.

Change Index Management

In order to improve performance on the client side, there is a so-called change index management: a text grid binds to an array of data records. Every time when the browser client receives updated data from the server, it finds out whether a text grid has to be updated or not. Updating a text grid is a quite expensive operation for the client - consequently, it is done only if really necessary.

For this reason, each TEXTGRIDCollection object implicitly administers a change index. A change index is a property of type long. The value of the property always changes if something inside the collection changes. The client reads this property and only refreshes the text grid if the property has changed.

Normally, the property is managed internally - without you being involved. If a TEXTGRIDCollection is manipulated via its methods (e.g. add or clear), then the property is automatically updated - and consequently, the client refreshes. But: if a change of data happens inside one item of a TEXTGRIDCollection, then the call does not go through the TEXTGRIDCollection API. Consequently, you have to explicitly trigger the update by your program. Inside the TEXTGRIDCollection, there is a method itemChanged() which indicates that due to the change of data within one item the grid has to be updated.

The following example shows how to control the change index. In this example, a text grid is built and manipulated by three buttons:

With the first button, new items are added to the grid. With the second button, all items receive new content. With the third button, the change index will be updated.

The XML code is:

<rowarea name="Textgrid with Change Index Management">
    <itr>
        <textgrid2 griddataprop="lines_02" width="100%" height="200">
            <column name="Text" property="text" width="100%">
            </column>
        </textgrid2>
    </itr>
    <itr>
        <button name="Add Data Line" method="onAddDataLine">
        </button>
        <button name="Update Data Lines" method="onUpdateDataLines">
        </button>
        <button name="Update Change Index" method="onUpdateChangeIndex">
        </button>
    </itr>
</rowarea>

The Java adapter source is shown below. Pay attention to the constructor of the m_lines member (which passes "true" as a parameter) and to the method m_lines.itemChanged() that is called in order to update the change index implicitly.

// This class is a generated one.

import java.util.Date;
import java.util.Iterator;

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.TEXTGRIDCollection;

public class Textgrid_02_Adapter
    extends Adapter
{
    // ------------------------------------------------------------------------
    // inner classes
    // ------------------------------------------------------------------------
    // class >Lines_02Item<
    public class Lines_02Item
    {
        // property >text<
        String m_text;
        public String getText() { return m_text; }
        public void setText(String value) { m_text = value; }
    }
    // ------------------------------------------------------------------------
    // property access
    // ------------------------------------------------------------------------

    // property >lines_02<
    TEXTGRIDCollection m_lines_02 = new TEXTGRIDCollection();
    public TEXTGRIDCollection getLines_02() { return m_lines_02; }

    // ------------------------------------------------------------------------
    // public adapter methods
    // ------------------------------------------------------------------------
    /** */
    public void onAddDataLine()
    {
        Lines_02Item l = new Lines_02Item();
        l.setText((new Date()).toString());
        m_lines_02.add(l);
    }

    /** */
    public void onUpdateChangeIndex()
    {
        m_lines_02.itemChanged();
    }

    /** */
    public void onUpdateDataLines()
    {
        Iterator iter = m_lines_02.iterator();
        while (iter.hasNext())
        {
        Lines_02Item l = (Lines_02Item)iter.next();
        l.setText((new Date()).toString());
        }
    }
}

The behavior of the text grid control is as follows:

• If a new line is added (method onAddDataLine()), the change index will be updated internally - you do not have to explicitly tell the text grid management that something has changed.

• If the lines are updated (method onUpdateDataLines()), changes will not be reflected in the grid - until you explicitly trigger the method onUpdateChanngeIndex().

Consequence: every time you change the inner content of the grid data, you have to update the change index by yourself.

Flexible Columns with CSVCOLUMN

There are situations in which the number and the format of the columns of a text grid cannot be defined in a fixed way inside the layout definition. The column type CSVCOLUMN allows you to dynamically define columns of a grid by your adapter program.

Have a look at the following example:

The control looks like a normal text grid. When looking inside the XML layout definition, you find out that instead of three fixed columns there is one dynamic column definition:

<rowarea name="Rowarea">
    <itr>
        <textgrid2 griddataprop="lines" width="100%" height="150" selectprop="selected"
                   singleselect="true" hscroll="true">
            <csvcolumn titlesprop="gridTitles" valuesprop="values" widthsprop="gridWidths"
                       alignsprop="gridAligns" backgroundsprop="backgrounds">
            </csvcolumn>
        </textgrid2>
    </itr>
</rowarea>

Inside the CSVCOLUMN definition, there is a binding to various properties that are provided for by the corresponding adapter:

// This class is a generated one.

import com.softwareag.cis.file.CSVManager;
import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.TEXTGRIDCollection;


public class textgrid_03_Adapter
    extends Adapter
{
    // ------------------------------------------------------------------------
    // inner classes
    // ------------------------------------------------------------------------
   // class >LinesItem<
    public class LinesItem
    {
        public LinesItem (String values, String backgrounds)
        {
            m_values = values;
            m_backgrounds = backgrounds;
        }

        // property >backgrounds<
        String m_backgrounds;
        public String getBackgrounds() { return m_backgrounds; }
        public void setBackgrounds(String value) { m_backgrounds = value; }

        // property >selected<
        boolean m_selected;
        public boolean getSelected() { return m_selected; }
        public void setSelected(boolean value) { m_selected = value; }

        // property >values<
        String m_values;
        public String getValues() { return m_values; }
        public void setValues(String value) { m_values = value; }
    }
    // ------------------------------------------------------------------------
    // property access
    // ------------------------------------------------------------------------
    String m_gridAligns = CSVManager.encodeString(new String[] {
            "left",
            "left",
            "right"
            });
    public String getGridAligns() { return m_gridAligns; }

    String m_gridTitles = CSVManager.encodeString(new String[] {
            "First",
            "Second",
            "Third"
            });
    public String getGridTitles() { return m_gridTitles; }

    String m_gridWidths = CSVManager.encodeString(new String[] {
            "200",
            "200",
            "200"
            });
     public String getGridWidths() { return m_gridWidths; }

    // property >lines<
    TEXTGRIDCollection m_lines = new TEXTGRIDCollection();
    public TEXTGRIDCollection getLines() { return m_lines; }

    // ------------------------------------------------------------------------
    // public adapter methods
    // ------------------------------------------------------------------------
    /** initialisation - called when creating this instance*/
    public void init()
    {
        m_lines.add(new LinesItem("100;100;100","#FF0000;#00FF00;#0000FF"));
        m_lines.add(new LinesItem("200;200;200","#00FF00;#FF0000;#0000FF"));
        m_lines.add(new LinesItem("300;400;500","#FF0000;#FF0080;#FF00FF"));
    }
}

The information for creating dynamic columns is passed as comma separated values. Comma separated values are either created directly as a string or by calling a static method of the class com.softwareag.cis.file.CSVManager.

Example: the CSVManager will encode the strings "A", "B1;B2" and "C" to "A;B1\;B2;C". On the client side, the "\;" is decoded back to ";".

Compare the layout definition with the code example in order to find out the exact binding technique between the control and the adapter properties.

CSVCOLUMN Properties

The properties of the CSVCOLUMN control are:

Basic
titlesprop	Name of adapter property provding a semicolon-separated string containing the titles to be displayed. Example for a value that is passed back by the property: "First Name;Last Name;Street""	Obligatory
valuesprop	Name of row item property that passes back the content of the cells - as semicolon-separated string.	Obligatory
widthsprop	Name of adapter property provding a semicolon-separated string containing the widths of the columns to be displayed. Example for a value that is passed back by the property: "100;200;100%""	Obligatory
alignsprop	Name of adapter property provding a semicolon-separated string containing the horizontal alignment of the columns to be displayed. Example for a value that is passed back by the property: "left\"center;right""	Sometimes obligatory
backgroundsprop	Name of adapter property provding a semicolon-separated string containing the background color of the columns to be displayed. Example for a value that is passed back by the property: "\"#C0C0C0;#FF0000""	Optional
proprefsprop	Name of adapter property provding a semicolon-separated string containing the row item properties that are internally used to build up the value string. The property names are used for sorting: if the user invoke the sorting of the grid by clicking on the corresponding icons inside the title cell then this column needs to be associated with an internal property that is used for sorting. Example: "firstName\"lastName;street""	Optional
comment	Comment without any effect on rendering and behaviour. The comment is shown in the layout editor's tree view.	Optional
Appearance
straighttext	If the text of the control contains HTML tags then these are by default interpreted by the browser. Specifiying STRAIGHTTEXT as "true" means that the browser will directly render the characters without HTML interpretation. Example: if you want to output the source of an HTML text then STRAIGHTTEXT should be set to "true".	Optional	true false
cuttextline	If switched to "false" then the content of the column is broken if it excceeds the column's width definition. Default is "true" i.e. if the content is too big for the column cell then it is cut.	Optional	true false
headernowrap	The textual content of the header is not wrapped automatically. No line break will be performed automatically by the browser. If you want the text of the header to be wrapped, set the value to "false".	Optional	true false
withgridcolheaders	Flag that indicates if the user can resize column widths and re-order columns by drag and drop. Default is false. If set to true the corresponding adapter program must register as "column change event" listener. Use method TEXTGRIDCollection.registerGridColHeaderChangeListener for that.	Optional	true false
Binding
textstyleprop	Name of the property of the row item object that passes back a style-string that is used for rendering the column's content. As consequence you can indiviudally assign a CSS-style to each cell of your text grid.	Optional
textclassprop	Name of the property of the row item object that defines a style class to be used for rendering the content. You can set up a limited number of style classes inside your style sheet definition - and dynamically reference them per grid cell.	Optional
straighttextprop	Name of the property which dynamicalle defines whether STRAIGHTTEXT is true or false.	Optional
sorttitlesprop	Name of adapter property provding a semicolon-separated string containing the titles to be displayed. Example for a value that is passed back by the property: "Click here to sort column First Name\" Click here to sort column Last Name; Click here to sort column Street""	Optional
tooltiptitlesprop	Name of adapter property provding a semicolon-separated string containing the tooltip tip texts to be displayed when the mouse is moved over the column headers.	Optional
linkmethodsprop	Name of the property of the row item object that passes back (comma separated) names of row item methods. The corresponding columns will show the text as method links. On click the provided row item method is called.	Optional
celllinkmethodsprop	Name of the row item property that passes back (comma separated) names of cell methods. The corresponding columns (cells) will show the text as method links. On click the provided row item cell method is called.	Optional
celltooltiptitleprop	Name of the property of the row item object that passes back (comma separated) tool tip titles. The titles will show up if the user is moving slowly the mouse over the grid cells.	Optional
imageprop	Name of the property of the row item object that passes back (comma separated) image URLs. The URL must either be an absolute URL or a relative URL.	Optional
headerimageprop	Name of the property that passed back (comma separated) image URLs. The images are applied to the header.	Optional