Imagine this situation. I have main JFrame window and another one which pops out from the main window, by button click. What should I do if I want to repaint graph in main window by clicking the button on the popped up window?
The popped up window needs a reference to the main window. So in the constructor of the popped up window you will accept a reference to the main window and keep it until needed.
In the main window you can write a method update() that can be called from the popped up window and cause the main window to repaint itself accordingly. For example:
PoppedUpWindow win = new PoppedUpWindow(this);//this is the main window
and in the popped up window:
MainWindow mainWin;
JButton btn;
public PoppedUpWindow(MainWindow mwin){
mainWin = mwin;
btn = new JButton("Click to Update");
btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
mainWin.update();
}
});
}
Related
I have an Android application with a dialog and a few buttons inside.
I want to reuse the dialog for different purposes and looking for a way to call the button from a separate class and define an action event for it.
Creating a test class, I managed to define an action event for a button inside a form, but the same code does not work for a button inside a dialog, and I can't get my head around why it is not working for the dialog.
Below is what I already have. Any suggestions would be appreciated.
public Class One {
Test test = new Test();
test.testOne(); // this is working : button prints
test.testTwo(); // this is not working : button does not print
buttonTest = test.getTestButton();
buttonTest.setText("Hello World"); // not working for a button in a dialog
buttonTest.addActionListener(l-> { // prints when the button in a Form
System.out.println("try"); // does not print when the button is in a dialog
});
}
public class Test {
Dialog dialog = new Dialog();
Form form = new Form();
Button button;
public void testOne() {
button = new Button("Test");
form.add(button);
form.show();
}
public void testTwo() {
button = new Button("Testing");
dialog.add(button);
dialog.show();
}
public Button getTestButton () {
return button;
}
}
You add the action listener after showing the form and dialog. This isn't a problem for the form since the forms show method will continue. But a dialogs show() method will block.
Two solutions:
Move the listener binding higher in the code (before the show) that would be a problem since the button doesn't exist yet so you will need some refactoring.
Change the show() call on the dialog to showModless()
While making a program, I noticed a bug with the JOptionPane.showMessageDialog() call. I use a button to create a JTextArea that wraps and then display a dialog containing this text area.
If the text area is too large, however, the dialog does not size itself correctly to the height of the JTextArea. The Dialog cuts off the OK button in this example.
I replicated the bug in the following code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class DialogBug {
public static void main(String[] args) {
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final String text = "looooooooooooooooooooooong text looooooooooooooooooooooooooooooooooooooong text";
JButton button = new JButton();
button.setPreferredSize(new Dimension(30, 30));
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JTextArea area = new JTextArea(text, 0, 50);
area.setEditable(false);
area.setLineWrap(true);
area.setWrapStyleWord(true);
area.append(text);
area.append(text);
area.append(text);
JOptionPane.showMessageDialog(frame, area, "why does it do this", JOptionPane.WARNING_MESSAGE);
}
});
frame.add(button);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
I would post a picture, but I don't have enough reputation...
Is there a way to fix this without having to use a JScrollPane?
Here's a screenshot:
If you run the pack command on the dialog (a function in the Window class) it will resize based on subcomponents. For your case you will have to rewrite without using the showMessageDialog() to get the resize to work (so make the dialog first, add the text, pack, then show it)
Dialog b = new Dialog();
// add stuff
b.pack();
For my test code it worked perfectly to get the dialogs to be the right sizes
Without pack()
With pack()
Developing using GXT 2.2.5 on GWT 2.3.0.
The application I'm working on displays a resizable Window with auto scrollbars. I want to make sure the Window size does not exceed the size of the browser window it gets displayed in. To that effect, I added the following code:
addWindowListener(new WindowListener()
{
public void windowActivate(WindowEvent we)
{
super.windowActivate();
Window window = we.getWindow();
window.layout(true);
int width = window.getWidth();
int height = window.getHeight();
int maxWidth = XDOM.getViewportWidth();
int maxHeight = XDOM.getViewportHeight();
window.setSize(Math.min(width, maxWidth), Math.min(height, maxHeight));
window.center();
}
};
This manages sizing the Window to fit in the browser when it gets opened quite nicely.
My problem is that if the user then resizes the browser window, the open Window does not adjust and ends up being clipped.
Is there some way for me to either force the Window to stay within the boundaries of the browser, or capture the resize event so that I can tell the Window to resize accordingly?
Thanks.
You need to add the listener (actually handler -- listeners got depreciated) to the browser window.
So if you have several different windows you show at different times that all need to be resized with the window, you need to have a listener for each window and add it to the browser window when the window is shown.
To add a listener to the browser Window, use:
com.google.gwt.user.client.Window.addResizeHandler(handler);
So for example to resize ContentPanel cp:
com.google.gwt.event.logical.shared.ResizeHandler handler = new ResizeHandler() {
#Override public void onResize(com.google.gwt.event.logical.shared.ResizeEvent event) {
cp.setWidth(event.getWidth());
cp.setHeight(event.getHeight());
}
};
So then if you switch to a new view or ContentPanel you need to register that...
com.google.gwt.user.client.Window.addResizeHandler(handler2);
com.google.gwt.event.logical.shared.ResizeHandler handler2 = new ResizeHandler() {
#Override public void onResize(com.google.gwt.event.logical.shared.ResizeEvent event) {
cp2.setWidth(event.getWidth());
cp2.setHeight(event.getHeight());
}
};
NOTE:
You can't do event.getWindow() for the ResizeEvent you need to handle that another way.
Actually I tend to do it in a constructor like:
com.google.gwt.event.logical.shared.ResizeHandler handler2;
public MyDialog(){
handler2 = new ResizeHandler() {
#Override public void onResize(com.google.gwt.event.logical.shared.ResizeEvent event) {
setWidth(event.getWidth());
setHeight(event.getHeight());
}
};
i call this method SolveUpdation (from button- onclickAction Listener) from mainAcitivity with main layout. i use other layout to get value from user and set it as button title in the main layout and that is only instruction that does not works for me
private void SolveUpdation() { //this function call is generated from the main Activity with main layout
setContentView(R.layout.updateappliance); //this is 2nd layout to get values from user and use them as buttonText in the main layout
btnSaveApp = (Button) findViewById(R.id.Bupdatenow);
btnSaveApp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
mOutEditText = (EditText) findViewById(R.id.edit_text_1);
TextView view1 = (TextView) findViewById(R.id.edit_text_1);
final String TitleApp1 = view1.getText().toString(); //the value is read properly here
// if (App1.length() > 0) {
// byte[] send = App1.getBytes();
// }
btnSaveApp.setText(TitleApp1); //this works fine
startActivity(new Intent(HomeScreen.this, HomeScreen.class));//this the main activity for main layout
setContentView(R.layout.main); //this is the main layout and this instruction works
buttonLED1.setText(TitleApp1); //buttonLED1 (a Togglebutton or can be simple) is defined in main layout and this does not works and this is what i am stuck with
SaveAppNamesToast(TitleApp1); //this is just to toast the value and it works fine.
}});
So plz can any one guide me why this instruction buttonLED1.setText(TitleApp1); does not works ??? Any help will be appreciatable.. thanks
No offense, but the way you write your code is not a good practice.
My advise: Stop calling another setContentView in your Main Activity. You should rather implement all needed Buttons and EditTexts in one layout and set their visiblity to gone or visible depending on which button was clicked.
If you don't wanna do this you should create a second class that handles the input of the user. After pressing the save button you initialize your intent for the main activity and give it via intent.putExtra("KEY", value) the input of the user.
Your Main Activity can receive this value via getIntent().getExtras().getInt("KEY").
By the way: I think your current code doesn't work because of the new Activity you start. Through this everything gets initialized again so the buttonLED1 that you see isn't the same buttonLED1 that gets the text.
My Monomac project has 2 forms (Form/Views): Mainwindow and form2. (I created form2 using: New -> monomac -> Cocoa View with controller > name is : form2)
On the MainWindow form I have a button. I want to make form2 show/visible when I click that button.
Action when button is clicked is: a1. This is my code :
partial void a1 (NSObject sender)
{
Console.WriteLine ("a1 call form2");
var f1 = new form2Controller();
f1.LoadView();
}
I want to show form2 once the view is loaded, what must I do?
If you've created a "Cocoa Window with controller", then you want to do this to show the window:
f1.Window.MakeKeyAndOrderFront();
If you've created a "Cocoa View with controller", then you have to hook up your window that you added to the xib to an outlet, then call it like:
f1.MyOutletForTheWindow.MakeKeyAndOrderFront();
To make a window visible, you will need to call the ShowWindow method of the view controller.
partial void a1 (NSObject sender)
{
Console.WriteLine ("a1 call form2");
Form2Controller form = new Form2Controller();
form.ShowWindow(this);
}