how can I write the codes necessary to zoom in/ out using ctrl +/-?

Programming Questions

processme

how can I write the codes necessary to zoom in/ out using ctrl +/-?

in Programming Questions • 2 years ago

I am trying to write a program with the following functions:

1.The pop-out window displays a zoomed-in view of the specified region while keeping the page-view in the background for reference.

2. Users can choose to have the main window zoom with a pop-out window showing the overall drawing if more space to navigate is desired.

how can I write the codes necessary to zoom in/ out using ctrl +/-?

thanks

Replies(1)

un_bsd

Re: how can I write the codes necessary to zoom in/ out using ctrl +/-?

2 years ago

Questions 1 & 2 seem to relate more to using separate windows. Take a look at ControlP5 library for processing. You're going to have to use a buffered image if you want to reference a zoomed in window.

As far as using +/- for control of the zoom level (as opposed to using something like, say PeasyCam), there are several methods to perform actions on key events. I _think_ the keycode method is the most portable and reliable method but I could be mistaken.

Copy code

void keyPressed() {
if (keyCode == KeyEvent.VK_MINUS) {
DoYourZoomOut();
}
if (keyCode == KeyEvent.VK_PLUS) {
DoYourZoomIn();
}
}