Applet with images

[The original stinger]

Hey I have an applet with several images on a canvas.

I want to know on wich image I have clicked and then be able to drag that image. How can I do this?

I'm already aware of the drag en drop of a mouseMotionAdapter and a mouseMotionListener. Wich I am using in my package. I just don't know how my application can recognize the image I clicked on.

[KevinWorkman]

Do you know the location of each image? Just check the mouse location against the bounds of each image.

[Norm]

how my application can recognize the image

A mouse listener would help you find where the mouse was clicked.
Then it depends on how the images are being displayed.

[The original stinger]

Do you know the location of each image? Just check the mouse location against the bounds of each image.

Yes I know the location of the images. When the applet starts 32 images are drawn. (BufferedImage[]) on the applet. 4 rows of eight.
g2.drawImage(image,positionX,positionY,null) in this way. But how do you check the bounds with your mouse?

[Norm]

The event passed to the listener has the location of the mouse click that you can get by calling a method.
Given the x,y of the click and the location of the images, you can search the images' locations to see which contains the location of the mouse click.

[The original stinger]

Do you have an example of this? I do have a mouseClicked method that gives me the exact position of the mouse. But I still don't get how you can compare this with all of the x,y coordinates the image overlaps on the canvas. Or isn't that nescessary?

[Norm]

how you can compare this with all of the x,y coordinates the image

If the locations of the images are in a list, use a loop to test the mouse's location against the location of each image in the list.

[The original stinger]

And if I don't know the location of the images. How do I get the location of the images. I placed the images on the applet myself (mvc) view so in theory I know them, but just wondering.

[KevinWorkman]

And if I don't know the location of the images. How do I get the location of the images. I placed the images on the applet myself (mvc) view so in theory I know them, but just wondering.

You have to know the position, or at least save it in a place you can get it (like in an Object that contains an image and its position). How else are you drawing it?

[The original stinger]

Yes but all 32 images are drown on a canvas (the view extends canvas) so canvas is the object you are referring to. Still a simple example would be very helpfull to understand this better.

[Norm]

If you define a rectangle that maps where the image is, you can use the rectangle class's contains() method. Something like this:
if(imagesRect[ix].contains(mouseClickPt)) {
// click was in this image
}

[DarrylBurke]

Moved from Advanced Java

db

[The original stinger]

If you define a rectangle that maps where the image is, you can use the rectangle class's contains() method. Something like this:
if(imagesRect[ix].contains(mouseClickPt)) {
// click was in this image
}

How do you define a rectangle that maps where the image is? Or how do you make a rectangle that contains an image?

[Norm]

Given the image's location at the x,y,w,h then define a Rectangle:
Rectangle imgRect = new Rectangle(imgX, imgY, imgW, imgH);