Programming Forums > Application Development > Java

Mjordan2nd · Oct 5th, 2004, 5:55 PM

You know everytime you call repaint() the program redraws everything, correct? And you know how that makes your program "blink?" Is it possible to get rid of the accursed blinking?

Xyler · Oct 6th, 2004, 2:11 AM

Use a buffer. That will help alot.

(Toggle Plain Text)

Image buffer;
Graphics gd;

public void update(graphics g)
{
paint(g);
}

public void paint(graphics g)
{
 *if (buffer == null)
 *{
 * *buffer = createImage(getWidth(), getHeight());
 * *gd = buffer.getGraphics();
 *}
 *if (buffer.getWidth(null) != getWidth() || buffer.getHeight(null) != getHeight())
 *{
 * *buffer = createImage(getWidht(), getHeight());
 * *gd = buffer.getGraphics();
 *}
 *// Reset background if need to
 *gd.setColor(Color.WHITE);
 *gd.fillRect(0,0, getWidth(), getHeight());
 *// Do all your drawing here
 *g.drawImage(buffer, 0, 0, null);
}

Well I am assuming u are using a canvas or something cos that is the only place I encountered flickering. Hopefully this will help.

Oct 5th, 2004, 5:55 PM	#1
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	You know everytime you call repaint() the program redraws everything, correct? And you know how that makes your program "blink?" Is it possible to get rid of the accursed blinking? __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Oct 6th, 2004, 2:11 AM	#2
Xyler Newbie Join Date: Sep 2004 Location: South Africa, Eastern Cape Posts: 28 Rep Power: 0	Use a buffer. That will help alot. (Toggle Plain Text) Image buffer; Graphics gd; public void update(graphics g) { paint(g); } public void paint(graphics g) { if (buffer == null) { * buffer = createImage(getWidth(), getHeight()); gd = buffer.getGraphics(); } if (buffer.getWidth(null) != getWidth() \|\| buffer.getHeight(null) != getHeight()) { * buffer = createImage(getWidht(), getHeight()); gd = buffer.getGraphics(); } // Reset background if need to gd.setColor(Color.WHITE); gd.fillRect(0,0, getWidth(), getHeight()); // Do all your drawing here g.drawImage(buffer, 0, 0, null); } Image buffer; Graphics gd; public void update(graphics g) { paint(g); } public void paint(graphics g) { if (buffer == null) { buffer = createImage(getWidth(), getHeight()); gd = buffer.getGraphics(); } if (buffer.getWidth(null) != getWidth() \|\| buffer.getHeight(null) != getHeight()) { * buffer = createImage(getWidht(), getHeight()); gd = buffer.getGraphics(); } // Reset background if need to gd.setColor(Color.WHITE); gd.fillRect(0,0, getWidth(), getHeight()); // Do all your drawing here *g.drawImage(buffer, 0, 0, null); } Well I am assuming u are using a canvas or something cos that is the only place I encountered flickering. Hopefully this will help. __________________ Be vewwy vewwy quiet. I'm hunting wuntime ewwors.

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Programming Forums > Application Development > Java

Avoiding Paint(); Or Getting Rid Of This Blinking