Bar charts display a number of data items as bars aligned at one end, with their sizes proportional to the corresponding data item values. In case of negative data, bars will grow in the opposite direction.

Bar chart

To create a bar chart

1. Drag the  Bar Chart element from the  Analysis palette into the graphical editor.
2. In the Data section of the chart’s properties, configure the first data item.
3. Enter the expression that will be dynamically evaluated to obtain the current value of the data item in the Value box.
4. Specify the name for the data item in the Title box. This text will be shown in the chart legend.
5. Specify the color for this data item’s bar. Click the control to use the color picker.
6. Open the Appearance section of the chart’s Properties. Adjust the direction of growth of bars using the Bars direction group of buttons.
7. Bars can be shown as distinct bars of arbitrary thickness, or adjacent to each other. Adjust the thickness of bars by setting the value for the Bars relative width property: set to 1 to use the maximum possible width without bars overlapping each other, 0.5 — half that value, and so on.

When finished, specify additional data items you want to be displayed in your chart.

To add a data item

By default, a new bar chart already has one data item. To add another, follow these steps:

1. Select the bar chart in the graphical editor or in the Projects view.
2. Go to the Data section of the properties.
3. Click the  Add button. A new property section with settings for one more data item will appear below.

To remove a data item

1. Select the bar chart in the graphical editor or in the Projects view.
2. Go to the Data section of the properties.
3. Locate the section defining the data item you want to remove from the bar chart.
4. In this section, click the  button.

General

Name — The name of the chart. The name is used to identify and access the chart from code.

Show name — If selected, the name of the chart is displayed in the presentation diagram.

Lock — If selected, the element is locked; it will not respond to any mouse actions during the model development time. To select the element, click its icon in the Elements view.

Ignore — If selected, the chart is excluded from the model.

Data

Value — The expression evaluated to obtain new Y-axis values to be added onto the chart.

Title — Data item name to be shown in the chart legend.

Color — The color of the data item. Click the control to use the color picker.

The  and  arrows — Allow you to rearrange the data items.

The  button — Allows you to remove data items from the chart.

The  Add button — Creates a section for a new data item.

Data update

Update data automatically — If selected, new data samples will be added automatically.

Use model time —  [Visible if Update data automatically is selected] If selected, the event will occur at the specified model time.

Use calendar date — [Visible if Update data automatically is selected] If selected, the event will occur at the specified calendar date.

First update time — [Visible if Update data automatically and Use model time are selected] The time of the first update defined as a number of model time units that must pass from the model start.

Update date — [Visible if Update data automatically and Use calendar dates are selected] The calendar date and time of the event.

Recurrence time — [Visible if Update data automatically is selected] The time that must pass between recurring updates.

Scale

Scale — Specifies the scaling type for your chart:

Auto mode automatically reserves the optimal space for the chart area
Fixed mode allows you to define minimum and maximum Y-axis values for the chart using either a static or a dynamic value in the From / To edit boxes
100% mode dynamically scales the chart area to match the chart’s maximum Y-value

Appearance

Bars direction — Defines the bar growth direction:

Up
Right
Down
Left

Bars relative width — Specifies the bar size as a ratio of the desired bar size to the maximum possible width of a bar in this chart (1 stands for 1:1, 0.5 stands for 1:2, and so on).

Axis labels position — Specifies the position of the axis labels relative to the chart.

None — No labels will be displayed
Left
Right

Style — Click to access extra appearance settings and then click each control to adjust them using the color picker.

Background color — The background color for the entire area allocated for the element. The background color for the chart area can be adjusted later in the Chart area section.
Border color — The color of the outer border of the element.
Labels color — The color of the Y-axis labels.
Grid color — The color of the grid inside the chart area.

Position and size

Level — The level this chart belongs to.

X — The X-coordinate of the element’s upper left corner.

Y — The Y-coordinate of the element’s upper left corner.

Width — The width of the element (in pixels).

Height — The height of the element (in pixels).

Legend

Show legend — If selected, the chart legend is displayed.

Position — [Enabled if Show legend is selected] Controls the legend position relative to the chart.

Area size — [Enabled if Show legend is selected] Controls the size of the legend area (between the element border and the divider): width for North/South legend position or height for West/East position.

Text color — [Enabled if Show legend is selected] The color that will be used to display the legend. Click the control to adjust the settings using the color picker.

Chart area

This section defines the visual properties of the chart area.

X Offset — The horizontal offset of the chart area from the left edge of the element.

Y Offset — The vertical offset of the chart area from the left edge of the element.

Width — The width of the chart area (in pixels).

Height — The height of the chart area (in pixels).

Style — Click to access extra appearance settings and then click each control to adjust them using the color picker.

Background color — The chart area background color.
Axis color — The chart area axis color.

Actions

On selection change — The code executed when the user selects particular data items. This code is executed either when the user changes the selection by clicking on items in the chart legend, or when the selection is changed programmatically by selectItem().

You can use the following variables:

• int[] selectedIndices — returns the indices of currently selected data items
• boolean programmatically — defines whether items were selected programmatically (true) or not (false)

Visibility

Visible — Toggles the visibility of the element. The chart is visible when the box is checked or when the specified expression evaluates to true, and not visible otherwise.

Agent presentation — If selected, the chart is included in the agent presentation. This means that if the agent hosting this control is embedded in another agent, the control will remain visible.

Expert

Replication — The replication factor of the chart. Here you can specify how many copies of the chart will be created. If you leave this box empty, only one chart will be created.

Data items

Function	Description
void addDataItem(DataItem di)	Adds a DataItem element to the chart with a default title and color. di — the data item to add
void addDataItem(DataItem di, String title, Color color)	Adds a DataItem element to the chart. di — the data item to add title — the data item title color — the color to associate with this data item
int getCount()	Returns the number of chart items (data items or data sets) currently being displayed by this chart.
DataItem get(int i)	Returns the chart item (DataItem, DataSet, and so on) with the given index.
String getTitle(int i)	Returns the title of the chart item (DataItem, DataSet, and so on) with the given index.
Color getColor(int i)	Returns the color of the chart item (DataItem, DataSet) with the given index. i — the index of the item.
void setColor(int i, Color c)	Sets the new color of the chart item (DataItem, DataSet) with the given index. i — the index of the item c — the new color of the item.
void remove(int i)	Removes the item (DataItem, DataSet, and so on) with the given index from the chart.
int remove(ChartItem ci)	Removes the given item (DataItem, DataSet) from the chart.
void removeAll()	Removes all items from the chart.

Selecting data items

Function	Description
void selectItem(int itemIndex, boolean selected)	Selects or deselects (depending on the selected value) from the chart item with the specified index.
void setSelectedItemIndices(int[] selectedIndices)	Selects only the chart items with the given indices. selectedIndices — an array of indices of the chart items to select (other chart items will not be selected), can be null — this will clear the selection
int[] getSelectedItemIndices()	Returns the number of chart items (data items or data sets) currently being displayed by this chart.

Setting the chart’s axis scale

Function	Description
void setFixedScale(double minimum, double maximum)	Sets the fixed scale for the chart. minimum — the minimum of the chart axis scale maximum — the maximum of the chart axis scale

Updating chart data manually

Function	Description
void updateData()	Updates all data items being displayed by this chart.

Location

Function	Description
double getX()	Returns the X-coordinate of the element (upper left corner).
double getY()	Returns the Y-coordinate of the element (upper left corner).
void setX(double x)	Sets the X-coordinate of the element. x — the new value of the X-coordinate
void setY(double y)	Sets the Y-coordinate of the element. y — the new value of the Y-coordinate
void setPos(double x, double y)	Sets new coordinates for the element. x — the new value of the X-coordinate y — the new value of the Y-coordinate
void setPos(Point p)	Sets new coordinates for the element. p — the Point object containing the new coordinates

Size

Function	Description
double getWidth()	Returns the width of the element.
double getHeight()	Returns the height of the element.
void setWidth(double width)	Sets new width for the element. width — the new value of the chart width
void setHeight(double height)	Sets new height for the element. height — the new value of the chart height

Visibility

Function	Description
boolean isVisible()	Checks the visibility of the element. Returns true if the element is visible, and false otherwise.
void setVisible(boolean v)	Sets the visibility of the element. v — the visibility: if true — the chart is set to be visible, if false — not visible.

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