<html> <head> <title>CamStream Tech Docs</title> <link rel="stylesheet" href="../tech.css" type="text/css"> </head> <body> <h1>Programming style</h1> <p>Because I build the program on top of Qt, some things are quite easy to program. For example: when two views of the same video device are open, and you change the size of one of them, the other automaticly changes with it, including all dialogs! So how I do this? Well, with the signal/slot mechanism it's really easy. <p>In this case there is a single common item: the video device. So it makes sense for this device to announce to the world that something has changed, and that is just what the <span class="code">CVideoDevice::Resized()</span> signal is for: when the size has been changed by a call to <span class="code">CVideoDevice::SetSize()</span>, this signal will be called. All viewers and dialogs connect to this slot, and thus get notified of any changes. <p>The Qt library automatically cleans up connections to objects that are deleted, so you don't no need to worry about that. </body> </html>
