install4j：更改标签颜色

Question

I have three Run executable or batch file actions that invokes my launch scripts, tails into the log files respectively, and verifies that each service has started entirely. I would have used the native launch action in install4j but these services need to start in order - synchronously - and take up to 30 seconds per service.

After each action, I have a Run script action that verifies the return code and determines whether the rest of the scripts should execute as well. On the form itself, it shows the installed components and I would like to add an icon and change the color of each label after it successfully launches.

If this has confused you, please see the screen shot below to get a better under standing.

And as always, thanks for your support.

Chris

Answer 1

The trick is how to get the form environment of a screen from a "Run script" action. A screen that can contain form components is an instance of com.install4j.api.screens.FormPanelContainer and that class provides access to the com.install4j.api.formcomponents.FormEnvironment .

In a "Run script" action, you can do this:

import java.awt.EventQueue;
import java.awt.Color;

EventQueue.invokeLater(new Runnable() {
    public void run() {
        FormEnvironment formEnvironment = 
            ((FormPanelContainer)context.getScreenById("screenId")).getFormEnvironment();
        JComponent label = (JComponent)formEnvironment.getFormComponentById("componentId").
             getConfigurationObject();
        label.setForeground(Color.MAGENTA);
    }
});
return true;

with the appropriate values for "screenId" and "componentId".

for a more reusable solution add

import java.awt.EventQueue;
import java.awt.Color;

public static void changeColor(final String screenId, final String componentId, 
                               final Color color, final Context context) 
{
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            FormEnvironment formEnvironment = 
               ((FormPanelContainer)context.getScreenById(screenId)).getFormEnvironment();
            JComponent label = (JComponent)formEnvironment.getFormComponentById(componentId).
                getConfigurationObject();
            label.setForeground(color);
        }
    });
}

to the static code on the "Installer->Custom Code & resources" step (install4j 6+) and call

changeColor("screenId", "componentId", java.awt.Color.GREEN, context);

in your "Run script" actions.

---

For setting an icon , you have to define the "Icon" property on one label component and use the "Initialization script" property to save it in the context and remove it from the label:

context.setVariable("checkIcon", configurationObject.getIcon());
configurationObject.setIcon(null);

Then after the call to label.setForeground(); in the above code snippets, you can call

    label.setIcon((Icon)context.getVariable("checkIcon"));