330 Java Tips.pdf - FTP Server

Graphics, AWT, Swing II part
a right click and show the popup. The problem is that i can right click on the popup
labels to select them, but i'd like to select them only with a left click. How can i
disable the right click on the label? Can somebody help me please?
Answer: You can add in an if loop that only executes if the left mouse button is down
using code like the following:
MouseEvent e;
if ((e.getModifiers() & e.BUTTON1_MASK) != 0)
{ // code for left button click }
and just so you know,
InputEvent.BUTTON2_MASK is the middle or scroller button
InputEvent.BUTTON3_MASK is the right button in windows
-by
MSW
Q: How do I count the width in pixels of the text before drawing them into
graphics?
I have the Font and the String and I am using them in an applet:
graphics.setFont(font);
graphics.drawString(str);
How do I count the width in pixels of the text before drawing them into graphics?
Answer: import java.awt.*;
Toolkit tk = java.awt.Toolkit.getDefaultToolkit();
FontMetrics fm = tk.getFontMetrics(new Font("Arial", Font.PLAIN, 10));
int width = fm.stringWidth("Your String");
--
Jarkko
Q: If I do (CustomFrame extends Frame) smth. like this:
Frame newFrame = new CustomFrame();
what are the advantages of doing this over:
CustomFrame newFrame = new CustomFrame();
Answer:
There is one difference.
If the reference is a Frame type you can always downcast it, but not if it
is a CustomFrame type.
Might be nice sometimes.
--
Soren ' Disky ' Reinke
Q: I want to know what is the difference between JScrollPane and JScrollBar...is
both same or not..?
Answer: No. A JScrollPane is a container for components which can grow larger than
file:///F|/350_t/350_tips/graphics-II.htm (2 of 6) [2002-02-27 21:18:10]