Buttons - PyQt with Python GUI Programming tutorial 3

Key Takeaways

what is going on everybody Welcome to part three of our python with pqt for creating goys tutorial video series in this video what we're going to be doing is adding a button to our Windows the first thing I always think of when I'm creating Windows is okay how do I add a button so that's what we're going to talk about next so to add a button the first thing that we're going to have to also import is going to be QT core now in theory we could actually add a button without QT core we just need the QT goey to create a button and make it do like button presses and stuff but to make it actually do anything like you know have any event handling we use QT core so once we have that we're ready to move on now uh just a quick note about our um structure here so the init method what it does is it runs every time it's the initial thing that runs every time we make an a window object this in it is going to run so that means every time we make a window object um like we have down here this in it runs and it runs all of this code so it supers window it does set geometry 5050 500 300 does the window title window icon and it shows now uh what we want it to do instead is instead of self. show we want it to run self. home now home is in reference to a method which does not exist does it have a Que in front of it no so home doesn't exist yet so let's go ahead and make our own and so we're going to say Define uh home and pass the obligatory self and now we're going to add some stuff here so my theory here is the in it is any kind of like core application stuff is going to be here so if you have a main menu you're going to put that in the init okay that because that makes sense it's going to be there no matter what so it's almost like a template right for the rest of your your guey but the home is going to be stuff that's like um specific to that that certain page that you're on so we're going to have Define home self and then what we're going to do is we're going to have some a button so buttons are generally short-handed as BTN so we're going to follow that uh sort of principle QT gooey. qpush button and then this button has just basically one parameter that you have to put in and that's going to be what do you want that button to say we want the button to say quit so then quit and then pass self next BTN do click. Connect Now generally let me make some space so we can them down generally whenever you have an event you're going to have this dot connect and then you pass through a method function whatever so we're going to pass through um something that's already built into QT but I'll show you in the next video how you can make your own but we'll just use theirs for now QT core. Q core application so QT core Q core application. instance ps. quit so what this basically does is exits the current instance of your QE application okay that's all so it runs that and it'll go away now what we're going to do that basically defines or tells what tells uh this connect method basically what are we going to do when the button is CED and then what we're going to do is we're going to say BTN and we'll do and actually we'll just show this for now so now let's just do self. show uh empty parameters finally generally you're going to have um some sort of main Loop here so you'll see people maybe do Define Main and they run main so um or you might have like run here we'll just use run for now it doesn't really matter but you should have some sort of main kind of running app applicate or function so we'll tab everything over put this up here and then we'll call run to run and that should be it so let's make sure everything worked up to this point so here we have our button we got quit pqt touch we hit quit sure enough the application closes when we hit quit awesome so now the only other thing I want to show you guys with buttons is uh resizing so just like the window you can resize or CH choose a specific size otherwise you can use the def fault of course but let's say we want to make it 100 by 100 so we'll do 100 by 100 button and then what if we don't want it right in that corner what if we want a button. move and we'll move that button also to 100 100 so we can save and run that and there's our button in the middle it's a nice perfect square and it's 100 by 100 and again that's from here not from like here okay and then we can still quit and all that okay so that's a real simple example of implementing buttons and of course there's a lot more to go as far as creating your own methods here so that's probably what we're going to do in the next video uh and there's a couple other things with resizing and moving which we'll also cover in the next video so if you have any questions or comments up to this point please feel free to leave them below otherwise as always thanks for watching thanks for all the support and subscriptions and until next time