how to use ToolTip' functions on a Graphics area?
Vinicius Pereira
I'm having some difficulties in applying the ToolTips functions in a
graphic program in java.
I was trying to make my canvas inherit the functions of ToolTip, to
when the mouse move over the draw area, appear a "tip" on the side of
the mouse, showing a text.
I already try a lot of things and nothing sens to work, I'm thinking
in do it manually. But I prefer to use the ToolTip package.
The sites that I'm using are:
http://java.sun.com/docs/books/tutorial/uiswing/components/tooltip.html
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#celltooltip
This last one is perfect to what I want, because it controls when and
how the tip is show. But I'm can't implement it at all.
Can somebody send me a example where its implemented?
Or a link to a tutorial?
Or modify this code to show me how it's done:
import java.applet.Applet;
import java.awt.Graphics;
public class Teste01 extends Applet{
public void init(){
repaint();
}
public void paint(Graphics g){
g.drawRect(10, 10, 50, 50);
}
}
Thanks in advance.
John B. Matthews
<bcd1c115-f525-4792...@t21g2000yqi.googlegroups.com>,
Vinicius Pereira <vinicius...@gmail.com> wrote:
> I'm having some difficulties in applying the ToolTips functions in a
> graphic program in java.
>
> I was trying to make my canvas inherit the functions of ToolTip, to
> when the mouse move over the draw area, appear a "tip" on the side of
> the mouse, showing a text.
I like TextLayout for this [1], but you can do it manually [2], too.
Just have paint() or paintComponent() draw it relative to the
coordinates given by your mouse-motion listener [3].
[1]<http://java.sun.com/javase/6/docs/api/java/awt/font/TextLayout.html>
[2]<http://sites.google.com/site/drjohnbmatthews/composite>
[3]<http://java.sun.com/docs/books/tutorial/uiswing/events/mousemotionlistener.html>
--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>
Vinicius Pereira
> In article
> <bcd1c115-f525-4792-a8e5-260a3d362...@t21g2000yqi.googlegroups.com>,
> Vinicius Pereira <viniciusdenov...@gmail.com> wrote:
>
> > I'm having some difficulties in applying the ToolTips functions in a
> > graphic program in java.
>
> > I was trying to make my canvas inherit the functions of ToolTip, to
> > when the mouse move over the draw area, appear a "tip" on the side of
> > the mouse, showing a text.
>
> I like TextLayout for this [1], but you can do it manually [2], too.
> Just have paint() or paintComponent() draw it relative to the
> coordinates given by your mouse-motion listener [3].
>
> [1]<http://java.sun.com/javase/6/docs/api/java/awt/font/TextLayout.html>
> [2]<http://sites.google.com/site/drjohnbmatthews/composite>
Hello,
Thanks John B. Matthews
Yes, that was what I think, but I was looking for a way to use these
ToolTip's functions of these packages.
I think that if use these functions, my program will be more
resourceful.
But I can make it manually.
My principal goal, is that my ToolTip look like this on of this site:
http://faculty.salisbury.edu/~despickler/pascgalois/Zn.html
In the applet on this site, press the button of "refresh" in the right-
superior corner.
The applet will show a colour figure of Pascal's Triangle.
Then put the mouse's cursor on the triangle and then appear a "tip" on
the side of the cursor. In the tip, appear the coefficient number of
the cell of the triangle which the cursor is.
Thanks again!
Knute Johnson
Tooltips are built in to Swing components. Why don't you use a JApplet
and a JPanel instead of the Applet and Canvas?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class test extends JApplet {
public void init() {
JPanel p = new JPanel();
p.setPreferredSize(new Dimension(100,75));
p.setBackground(Color.BLUE);
p.setToolTipText("My Blue JPanel");
add(p);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test t = new test();
t.init();
f.add(t,BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
});
}
}
--
Knute Johnson
email s/nospam/knute2009/
--
Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
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Vinicius Pereira
> Vinicius Pereira wrote:
> > Hello,
>
> > I'm having some difficulties in applying the ToolTips functions in a
> > graphic program in java.
>
> > I was trying to make my canvas inherit the functions of ToolTip, to
> > when the mouse move over the draw area, appear a "tip" on the side of
> > the mouse, showing a text.
> > I already try a lot of things and nothing sens to work, I'm thinking
> > in do it manually. But I prefer to use the ToolTip package.
> > The sites that I'm using are:
>
> >http://java.sun.com/docs/books/tutorial/uiswing/components/tooltip.html
>
>
> >http://help.eclipse.org/stable/index.jsp?topic=/org.eclipse.platform....
Hi Knute Johnson,
Yes, I already try this,
But how can I add a Graphics to the Panel?
This is my realy problem.
John B. Matthews
<21058638-43a9-4759...@k2g2000yql.googlegroups.com>,
Vinicius Pereira <vinicius...@gmail.com> wrote:
> On 8 jun, 14:16, "John B. Matthews" <nos...@nospam.invalid> wrote:
> > In article
> > <bcd1c115-f525-4792-a8e5-260a3d362...@t21g2000yqi.googlegroups.com>,
> > Vinicius Pereira <viniciusdenov...@gmail.com> wrote:
[...]
> Thanks John B. Matthews
>
> Yes, that was what I think, but I was looking for a way to use these
> ToolTip's functions of these packages. I think that if use these
> functions, my program will be more resourceful. But I can make it
> manually.
>
> My principal goal, is that my ToolTip look like this on of this site:
> http://faculty.salisbury.edu/~despickler/pascgalois/Zn.html
>
> In the applet on this site, press the button of "refresh" in the
> right- superior corner. The applet will show a colour figure of
> Pascal's Triangle. Then put the mouse's cursor on the triangle and
> then appear a "tip" on the side of the cursor. In the tip, appear the
> coefficient number of the cell of the triangle which the cursor is.
As Knute Johnson's example in this thread shows, JComponents have that
functionality already. Your example appears to be a JButton, which is
also a JComponent. Here's an example of a custom "tip" that follows the
mouse:
<code>
package gui;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TipTest extends JPanel {
private static Color hiliteColor = new Color(0xFFFFC0);
private static Font font = new Font("SansSerif", Font.PLAIN, 12);
private FontRenderContext frc =
new FontRenderContext(null, false, false);
private Point pt = new Point(Short.MAX_VALUE, Short.MAX_VALUE);
public TipTest() {
setPreferredSize(new Dimension(320, 240));
this.addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
pt.setLocation(e.getX(), e.getY());
TipTest.this.repaint();
}
});
}
@Override
public void paintComponent(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
g.setColor(Color.lightGray);
g.fillRect(0, 0, getWidth(), getHeight());
String s = pt.x + "," + pt.y;
Rectangle2D.Float r = (Rectangle2D.Float)
font.getStringBounds(s, frc);
r.setRect(r.x + pt.x - 3d, r.y + pt.y - 2d,
r.width + 6d, r.height + 4d);
g2D.setPaint(hiliteColor);
g2D.fill(r);
TextLayout layout = new TextLayout(s, font, frc);
g2D.setPaint(Color.black);
layout.draw(g2D, (float) pt.x, (float) pt.y);
g2D.setPaint(Color.blue);
g2D.draw(r);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new TipTest(), BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
});
}
}
</code>
Vinicius Pereira
> In article
Thanks
I guess it's better do it manually, like the code above.
Thanks John B. Matthews.
Thanks Knute Johnson.
Thanks for the help.
Knute Johnson
To which panel, the tooltip or to the JPanel?
Knute Johnson
> Hi Knute Johnson,
> Yes, I already try this,
>
> But how can I add a Graphics to the Panel?
> This is my realy problem.
The example you posted to John shows a different tooltip based on the
location on the panel. That is very easily done by overriding the
JComponent.getToolTipText(MouseEvent) method. See the modified example
below.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class test extends JApplet {
public void init() {
JPanel p = new JPanel() {
public String getToolTipText(MouseEvent me) {
int x = me.getX();
int y = me.getY();
int halfH = getHeight() / 2;
int halfW = getWidth() / 2;
if (x < halfW && y < halfH)
return "Northwest";
else if (x > halfW && y < halfH)
return "Northeast";
else if (x < halfW && y > halfH)
return "Southwest";
else
return "Southeast";
}
};
p.setPreferredSize(new Dimension(100,75));
p.setBackground(Color.BLUE);
John B. Matthews
<b9ed5d55-6012-413c...@z9g2000yqi.googlegroups.com>,
Vinicius Pereira <vinicius...@gmail.com> wrote:
> I guess it's better do it manually, like the code above.
I don't know. I'm still a little vague on your goal. Knute's second
example shows how to override getToolTipText() to customize the text
based on location, something I'd overlooked earlier. My example shows a
completely custom approach. The former is easier and more consistent;
the latter is more flexible but more effort.
You may have enough now to put together an example of what you're trying
to accomplish. Keep us posted on your progress.
--
John B. Matthews