?
Solved

transparent canvas

Posted on 1997-10-13
2
Medium Priority
?
883 Views
Last Modified: 2012-06-21
I have an applet with a panel.  I add canvas' to it, and I use the mouseDrag method to allow the user to move the graphics around the "desktop".  I couldn't use the mouseDrag if I didn't use the canvas.  But now I have to put transparent gifs in for graphics, but you only see the background of the canvas that the image is in through the transparency of the gif.  Is there any way to have the canvas be transparent so I can see the other images through the transparencies?

Seth
0
Comment
Question by:seth23
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 1

Accepted Solution

by:
mnelson051997 earned 200 total points
ID: 1228524
The way to have a transparent component is to use
the Component class instead of Canvas.  Using
Component means there is no peer involved, so if
you don't paint in an area, and update() is not
filling in the background, you see straight through.
This is what the JDK 1.1 calls a "lightweight"
component.
0
 

Author Comment

by:seth23
ID: 1228525
I am waiting to grade this.  I just asked another question about this problem, having to do with a problem that arises when I make the canvas into a component, and I can't test the transparency problem until the other problem is fixed.
0

Featured Post

Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
Suggested Courses

719 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question