G4P TOOL and code

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I’ve created a window that has a button that opens a 2nd window. The code shows an orange underlining some worries but I do not understand what is missing. The code runs normally.

G4p warnings
G4p warnings902×656 139 KB

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Normally when you move cursor on the word a message is shown on the lower side of the screen

The orange are variables that are not used.

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They are variables created internally by the G4p code. How could I use these variables ??? is there any example ??? Thanks???

4

Hello,

I just installed the latest library (G4P 4.3.2).
Example sketches are available in the PDE by navigating to:
File > Examples… > Contributed Libraries >

image
image264×631 10 KB

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5

First I suggest that you look at the G4P guides for more information on event handlers and other G4P matters.

As Chrisir pointed out the orange wavy lines are warnings that these function parameters are not being used inside the function and can be ignored.

Not in your code you have

synchronized public void win_draw1(PAppelt appc, GWinData data){

Noticed that the appc is not underlined because it is used in the very next statement
appc.background(230);

In the first function you have source which is the button that generated the event which can be useful if you want to modify the button. For instance every time you click this button you will get a new window. if you only want the button to work once, then add the code source.setEnabled(false); inside the event handler.

event is the event generated by the source, for buttons you just have the GEvent.CLICKED but some controls can generate more than one type of event and you might want to do something different based on the event type.

Here is a full list copied from the source file GEvent.java

/**
 * Enumeration of events that can be fired by G4P. <br>
 * 
 * GTextField and GTextArea events <br>
 * 	CHANGED 		Text has changed <br>
 *	SELECTION_CHANGED 	Text selection has changed <br>
 *	ENTERED			Enter/return key typed <br>
 *	LOST_FOCUS		TextField/Area lost focus <br>
 *	GETS_FOCUS		TextField/Area got focus <br>
 *
 * GPanel events <br>
 *	COLLAPSED  		Control was collapsed <br>
 *	EXPANDED 		Control was expanded <br>
 *	DRAGGED 		Control is being dragged <br>
 *
 * Button control events (PRESSED and RELEASED are not fired by default)
 *	CLICKED  		Mouse button was clicked <br>
 *	PRESSED  		Mouse button was pressed <br>
 *	RELEASED  		Mouse button was released <br>
 *
 * Slider control events events  <br>
 *	VALUE_CHANGING		Value is changing <br>
 *	VALUE_STEADY		Value has reached a steady state <br>
 *	DRAGGING		The mouse is being dragged over a component <br>
 *
 * 	GCheckbox &amp; GOption events <br>
 *	SELECTED		"Option selected <br>
 *	DESELECTED	 "Option de-selected <br>
 *
 */
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Thanks for your illustrative help