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Formatting the Rectangles and Rectangle Titles in a Heat Map

To format the rectangles in a heat map:

1. When there is only one group in the heat map, right-click on the heat map and select Format Rectangle from the shortcut menu to bring up the Format Rectangle dialog.

   When there are two or more groups in the heat map, right-click on the heat map, then from the Format Rectangle submenu, select a desired group field to bring up the Format Rectangle dialog for the field.

2. In the Fill tab, specify the fill color of the rectangles: Use Single Color, or Use Single Color with Condition.

   If you select Use Single Color:

   • When the heat map is colored by one of the following cases: no field, 1 to n groups, 1 to n groups and 1 summary, specify the first color (when colored by no field, all rectangles are filled with this color) and the transparency of the color schema to fill the rectangles (to change the color, click the color image and select a color from the color palette or input the hexadecimal value of a color directly in the text box). By default Vary Colors by Color List is checked which means each rectangle is filled with a different color. Click the Color List button to customize the color for each rectangle in the Color List dialog.

     

   • When the heat map is colored by a summary, gradient colors from the start color to the end color are mapped to the value range from the minimum value to the maximum value. Specify the start color for the minimum value and the end color for the maximum value separately. To exchange the start color and the end color, check the Reversed option. If you want to specify a color for the zero value, check Color When Zero and then define the color, then the gradient color will change from the start color to the zero value color, and then from the zero value color to the end color. You can also specify a color for the null values.

     

   If you select Use Single Color with Condition to fill the rectangles, specify the conditions and the color pattern bound with each condition respectively. For details, refer to Adding Conditional Color Fills to Charts.

3. In the Separator tab, specify the color, transparency, line style, and thickness of the lines separating the rectangles. JReport Designer preview shows a bad layout and in the exported results when separator thickness is set to a big value.

   

4. For a heat map chart in a library component, you can define web behaviors on the rectangles in the Behaviors tab.

   

   Select a trigger event from the drop-down list in the Events column, then click in the Actions column and click that appears in the text box. In the Web Action List dialog, bind a web action to the rectangles the same as you do to a label in the library component, which will be triggered when the specified event occurs on the rectangles. The web actions you can bind include Parameter, Filter, Sort, Change Property and Send Message.

   To add more web behaviors, click and define them as required; if a web behavior is not required, select it and click . Click or to adjust the order of the behaviors, then at runtime when an event that has been bound with more than one action happens, the upper action will be triggered first.

5. Click OK to accept the changes and close the dialog.

To format the titles for rectangles in a heat map:

1. When there is only one group in the heat map, right-click on the heat map and select Format Rectangle Title from the shortcut menu to bring up the Format Rectangle Title dialog.

   When there are two or more groups in the heat map, right-click on the heat map, then from the Format Rectangle Title submenu, select a desired group to bring up the Format Rectangle Title dialog for the group.

2. In the General tab, specify the height, fill color, and font color of the rectangle titles (to change a color, click the color image and select a color from the color palette or input the hexadecimal value of a color directly in the text box).

   

3. In the Font tab, set the font settings for the titles.

   

4. In the Border tab, set the border color, thickness, line styles, and whether the borders have shadow effect and the shadow color if yes.

   

5. Click OK to accept the changes and close the dialog.

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