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Hello this is mortiser Cordy.



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And in this story are you going to implement this on parchment and inside this floating.



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You said riskless.



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So let's go inside this method here.



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First of all I'm going to paste some valuables and you can see that these are the variables that I pasted



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here.



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The first one is of type integer.



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The name of this but is start ex-POWs.



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So you can see that I'm not initializing these variables here.



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Just declaring these variables here.



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And we have this fun in the start of why pose pose means position.



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OK.



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The float here.



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Start touch x float start.



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Touch y.



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So now let's see how we are going to initialize these variables.



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So let's start with this start X-posts.



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We can actually either initialize it here in line one hundred and fifty five or we can actually initialize



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it after we declared are valuable.



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So I can say start's x post assignment operator.



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And here I just need to refer to the parameters of the window manager but there is a problem here.



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The parameters of the window manager is actually created inside the uncreate Meffert and we cannot access



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those parameters from the untouched method.



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So if I scroll to the top here we can see that we actually created these parameters of the window manager



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here inside this and create it.



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So in order to solve this problem we need to declare this valuable inside our class.



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So here inside this class I'm going to say private and his name is going to be its type is going to



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be window manager that lay out Putnam's.



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This is just the type and the name.



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Let's change the name.



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Name it as window manager or w the palms acase semicolon.



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So now let's delete this value here inside and create it.



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And instead let's just refer to W.T. problems.



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Now we can access these parameters from our attachment.



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So here we have a problem.



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We need to change these parameters to W.T. perhaps or window manager problems.



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So let's change the name of these variables.



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The W.T. posts here.



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The pumps.



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So now as you can see this process is called refactoring.



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We are changing our codes for the builder.



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Right.



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It's called refactoring.



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It's really useful in your when you are creating your own projects or your own and reallocations.



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Make sure to always repackage your code to make it better make it simpler make it more meaningful.



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OK so now let's scroll down here.



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Let's go inside the untouched Merfeld.



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So here start ex-post right.



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Assignment operator.



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Now I can refer to W to deep harams that X Seneca's and this way we can access the start exposition



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of the window manager that holds or contains the floating Veach.



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So now we can say start why PPOs assignment operator w the palms.



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That's why semicolon.



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Now let's initialize our start.



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Touch x.



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So let's say start X assignment operator.



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So we have an argument here event which is of a motion event we can access the position of the touch



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x the start to touch x from this event which is of motion even so we can see event that gets RA X semicolon.



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Notice that the difference between Start exposition and the start to touch x is that the start exposition



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is going to give you the position of the floating widget on the screen X. But this Tut tut X is going



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to be when user for example starts touching the floating widget on the screen.



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Does it start to touch x is going to hold that starting to touch a static position that the user has



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started touching.



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And then for example the user wants to for example change the place of a widget or on the screen.



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So here we say events that get a raw x and B have to start to touch y.



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So start touch y assignment operator event that get RA y semicolon.



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So there is a problem here.



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Sure it does.



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So as you can see instead of assignment operator I put a minus here.



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So Vinita with the assignment operator here.



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OK so why do you want to access these values here.



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For example accessing the starting exposition of our widget or accessing the start in y position our



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widget or starting touch x because we want to drag our widget over on the screen we need to access these



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values.



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Let me show you the emulator so here it is my vision on the screen and then I want to drag this image



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here over on the screen.



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You can see that we need to access the starting position of this widget.



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You need to access this starting touching position of this widget.



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So while this happens how we can drag this image over on the screen by using the action down.



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So when I start touching this image and when I start moving this image here over on the screen or over



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other apps I am using the action down event.



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So let's go back to android studio and here after declaring these variables here let's create a suite



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statement let's say that we have a switch statement and this switch statement is going to switch between



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the values of the event that gets action.



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So if you want to get the action of the event that is related to the touch of the user right.



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So now let's Cotts these values.



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Here we are initializing our valuables our local valuables.



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Let's cut them and paste them here.



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Let's go inside the switch statement and let's create a case motion event motion event that's action



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down.



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So let's choose this fun action down colon and let's say let's actually paste these values here initializing



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our local variables.



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Now we can say that when the action is down when this user starts actually touching the the widget in



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order to change the position of the widget over on the screen we can return true from this untouched



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method so we can see your return true.



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So the action down means that the user has started touching the widget on the screen in order to move



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it.



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So let's create a comment here let's say that these two variables here at the start exposition and is



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that why position here we want to access the start



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position of widgets and these two variables starts to touch x and start touchpoint you want to access



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the start touching position that starts touching position



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of widgets.



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So now we want to return to return true means that the user has started actually touching the widget



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in order to move it.



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Now let's create another case statement.



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Now we have case motion event that action up on the line of Colin.



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Now here this action up means that the user has lifted his or her finger from the Wii Fit on the screen



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in order to let the app know that that touching or dragging the widget on the screen is now finished.



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So the action up is going to.



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In other words this means that we want to get the touching or drying process is now finished.



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It's called Action up.



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So now let me paste two lines of code here.



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As you can see I pasted this to valuables here.



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The first one is of type integer and the name is start to end exposition.



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So the moment the user starts touching the widget and the moment the user start lifting his or her finger



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from the widget on the screen.



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It is going to be a defense for the x value start to an exposition a difference between the starting



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position and the end position.



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So if you want to access that value so if put an assignment operator and we are we want to actually



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cast this to an integer value because the event that gets X is going to get was a float value and if



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would prefer to see a good event that gets right eats is going to give us the current position or the



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kind of touch position of the widget on the screen minus so minus start to touch exposition.



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So this thought exposition is the starting position of the widget that is being touched for the first



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day for example the user wants to change the position of the widget on the screen.



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Right.



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So we want to access that value.



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The moment these are the users start touching the widget.



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And here we have the current position for example the user has changed the position of the visit.



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So now we have the current position of the widget minus this thought X touch they start to touch x.



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So that's different now we have the difference between the end and the start the exposition.



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Right.



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So now we want to assign this value to this variable but we have an error here.



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This means that variable starts touchbacks might not have been initialized.



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So let's actually give them an initial value these valuables inside these on top of it.



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Let's give them zero as the value as the initial value or the default value.



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Now here the error is gone but here let's give these variables a meaningful name for example start to



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end X..



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Difference is more meaningful starts to an X difference.



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And starts to end.



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Why the difference in set of polls.



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Let's just type in here difference.



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So now this variable holds the difference between the end and the start that value.



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So why do you want to access this value because we want to actually specify the user has clicked on



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the widget or not.



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Why.



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So let me create an if statement and then I'm going explain more.



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So here it is the if statements that I pasted here for this case motion events that action of I am saying



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that if start to and X the fence is less than 5.



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So let me show you the emulator.



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So here it is our widget.



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Right.



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And now I want to actually change the position of this widget for example on the x axis from left to



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right or from right to left the starting position is here and the end position is here.



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Right.



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So now that we have this difference the start of and X difference.



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Sometimes when the user actually clicks on this widget it may actually change it.



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For example the user may change the position of the spirit a little bit.



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So we want to get that difference in order to say that maybe the user has clicked the visit in order



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to change the collapsed state into the expanded state.



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Right.



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Sometimes touching means clicking.



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Or for example the user clicks and is a widget and this widget moves a little bit here.



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So we want to say that if this visit moves a little bit here then that is called clicking.



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So it's really good for you to learn this technique.



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It really helps you in order to create such applications in Android.



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So let's go back to android studio.



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So that's why I created this statement.



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I am saying if start to end X difference.



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So let me show the emulator so that the x axis is here right on the on the horizontal axis and we have



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this starts to end why difference.



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So here this is the y axis.



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So now we are saying that if start to an X difference is less than 5.



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And the analytical operator starts to end.



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Why friends is again less than five then it is called collisions because there it is actually changed



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a little bit here on the screen so we can consider it as a click if you want to you can manipulate the



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display value by the way.



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But 5 is actually good here.



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Inside this statement We have another statement and in a statement actually we are saying that it is



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it collapsed.



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So we're calling MFL that we have not created yet inside our class we are going to create this method



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in a moment but this is going to return true if the widget is actually in a collapsed state.



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If it is true then it's going to go inside the curly braces of this statement and it's going to say



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collapsed view.



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That said visibility view that we don't want to see the collapsed view anymore.



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So when I actually change the place of this visit a little bit here for example here.



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Now it's changed to the expanded state.



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Right.



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So that's it.



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And here we can see that the collapsed view is gone.



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And the expanded view is visible.



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So let me click on this close button again.



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So now let me just click on this visit here.



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Now you can see that the collapse is gone.



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And the expanded view is visible.



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So now let's create this Nefert inside our class is we just collapsed.



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So he'll just scroll down here.



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So before so after the end in Crilley brace of these touch my feet here and inside this class floating



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views service class I am going to just type in here.



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Private's Boullion and in Aimee's is when it collapsed I put a pair of apprentices here and I just opened



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and closed this method by using these curly braces.



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So now let's just say return collapsed.



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You got get visibility is equal to view that visible semicolon.



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If the visibility of the collapsed view is actually visible and it is on the screen then this means



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that the widget is actually collapsed right there.



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And this it is going to return true.



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Otherwise the Smurfette is going to return false.



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So here you can see that the error is gone.



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So now let's go back to our switch statement here.



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And we have this action up and this statement so after the ending really brace of this if statement



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or this outer loop statement we can return TRUE return to semicolon.



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Finally here we need to specify the final case statement.



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It is going to be Moshin event that action move.



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So let's just say if in here case motion even motion event that action move this one colon.



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So now it's time to update the position of our widget the floating widget on the screen.



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First of all you need to specify the parameters our window manager.



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So we have this W.T. pardon's that X we want to update disvalue.



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Right.



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Because it is actually action move action move means that the user is dragging the floating widget on



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the screen.



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The action movie is going to be caught.



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So here we see WRAMC that X assignment operator.



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So first we have the starting exposition of our widget.



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So if you're going to say start x posts plus So now we want to cast our value to an integer value.



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So it's a part of Prentice's integer.



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And let's put another prof practice year.



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So let's say event



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gets RA x.



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So now we have the current position of our widgets on the screen.



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Touching that dragging process is now finished.



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Now we have the current position the current touch value they get for X the CANNOT TOUCH value of the



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X of our floating better than the screen.



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And we want to get the difference if we want to say minus start touch x semicolon.



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So if you want to say start exposition the initial position of our widget on the screen plus there result



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of this operation here event that gets raw eggs the kind of touch position minus this tarting touch



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position and we are casting this value to an integer value.



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And finally this value is going to be assigned to this window manager programs that acts in this way



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we can update the position of our floating widget on the screen.



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So this is the formula here.



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You can use this formula in any apps you want.



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For example you want to change the position of a specific widget or a component on the screen.



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You can use actually this formula here and let's say that we have the perhaps that why don't we want



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to use this formula.



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So put an assignment operator.



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Now we say start with voice position plus.



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Let's test this to an integer value.



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And let's put up her Apprentice's again event that gets raw Voi minus 13 touch y semicolon.



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But we can say the window manager that up date we are calling this Meffert update view lay out.



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So this if it needs two arguments the first one is going to be the view the floating period.



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So we passed the floating widget comma and finally we need to pass the parameters so we updated the



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x and y coordinates of our window manager here write the parameters.



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So if you want to pass the w the Pops.



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And finally we are going to return true from this case return TRUE semicolon.



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So we passed these values here but we have another error.



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This it on touch move it needs to return a boolean value.



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But we created a switch statement and only one of these case statements of the switch statement is actually



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executed.



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The boolean value is going to be returned for example.



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True but as a whole inside the curly braces of the Smurfette untouched we need to return a boolean value.



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So let's say just return false.



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Let's say before the end curly brace of this unperson for let's say return for Senechal.



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So let me sum in space here.



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That's it.



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This is our untouched method and that's enough for this tutorial.



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And if you have any questions about these concepts that you've learned so far about implementing this



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untouched method please post the discussion in the course and then I'll do my best to answer all of



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your questions in the next tutorial.



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We are going to implement the and destroy method here inside our class so that we can make sure the



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widget meant that a service is actually stopped we can make sure that the memory is also emptied.



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And we do not encounter memory problems later.



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And our app is actually published.



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So thank you very much for watching.



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And I look forward to seeing you in the next tutorial.