0 1 00:00:04,670 --> 00:00:06,330 Hello everybody, in this lesson we are going 1 2 00:00:06,330 --> 00:00:10,130 to learn how we can use check boxes for our applications. 2 3 00:00:10,130 --> 00:00:12,690 So what we need to do, if you want to create a check box 3 4 00:00:12,690 --> 00:00:15,580 here firstly, of course we need to create our variable, 4 5 00:00:15,580 --> 00:00:20,580 and I will name it 'check box', something like that, okay? 5 6 00:00:20,613 --> 00:00:24,060 'Check box is equal to', and after that what I need to do, 6 7 00:00:24,060 --> 00:00:26,400 I need to use my constructor method, right? 7 8 00:00:26,400 --> 00:00:29,900 I can use the TK or TTK module, it doesn't matter. 8 9 00:00:29,900 --> 00:00:32,950 But I am going to use the TK module, okay? 9 10 00:00:32,950 --> 00:00:37,330 So, my constructor method will be a 'check button', okay? 10 11 00:00:37,330 --> 00:00:39,520 And now we need to create our properties. 11 12 00:00:39,520 --> 00:00:42,550 The first property will be 'root', our top level window, 12 13 00:00:42,550 --> 00:00:46,330 and after it here, I want to create text property. 13 14 00:00:46,330 --> 00:00:47,883 For the text I will say: 14 15 00:00:49,280 --> 00:00:52,040 'Remember me', okay? 15 16 00:00:52,040 --> 00:00:54,950 And after that, I need to create 16 17 00:00:54,950 --> 00:00:57,740 a variable for my check box. 17 18 00:00:57,740 --> 00:01:00,180 I will tell you why we are using check box variable, 18 19 00:01:00,180 --> 00:01:02,410 and here I will name it: 19 20 00:01:02,410 --> 00:01:06,570 'Check box variable', okay, something like that. 20 21 00:01:06,570 --> 00:01:09,070 And also let's use font for our 21 22 00:01:09,070 --> 00:01:13,003 check box, 'font equals', here what I need to say, 22 23 00:01:13,003 --> 00:01:16,510 let's use, quote 'Arial' for our font family, 23 24 00:01:16,510 --> 00:01:19,773 and for the size, I'll say '16', okay? 24 25 00:01:20,610 --> 00:01:23,000 And also, after that what I need to use, 25 26 00:01:23,000 --> 00:01:26,450 I need to use here grid geometry manager, right? 26 27 00:01:26,450 --> 00:01:29,510 For my check box. 27 28 00:01:29,510 --> 00:01:33,860 I will say 'grid, row equals four'. 28 29 00:01:33,860 --> 00:01:34,693 Why four? 29 30 00:01:34,693 --> 00:01:37,720 Because our last row was three, right? 30 31 00:01:37,720 --> 00:01:41,870 Now, I will use four for check box, okay? 31 32 00:01:41,870 --> 00:01:45,498 And also, 'column' will be zero, okay? 32 33 00:01:45,498 --> 00:01:48,500 And now what I need to do here, I need to 33 34 00:01:48,500 --> 00:01:50,180 create this variable right here. 34 35 00:01:50,180 --> 00:01:51,263 I will say: 35 36 00:01:52,507 --> 00:01:57,470 'check box var equals integer var'. 36 37 00:01:57,470 --> 00:01:58,640 Why is integer? 37 38 00:01:58,640 --> 00:01:59,823 Let me explain it. 38 39 00:02:01,550 --> 00:02:05,410 Now, if our check box is checked, it's value will be one. 39 40 00:02:05,410 --> 00:02:09,280 If it's not checked, by default it will be zero, okay? 40 41 00:02:09,280 --> 00:02:12,170 That's why we need to use here, integer variable, 41 42 00:02:12,170 --> 00:02:16,350 and also after that here I will say 'check box var, 42 43 00:02:16,350 --> 00:02:20,510 dot set', and I will set it to 'zero', okay? 43 44 00:02:20,510 --> 00:02:22,950 Zero means not checked, okay? 44 45 00:02:22,950 --> 00:02:25,283 And if I run my application now, let's see. 45 46 00:02:27,620 --> 00:02:30,130 As you see now, our check box is here, 46 47 00:02:30,130 --> 00:02:32,450 but it is here on the left side, but why is like that? 47 48 00:02:32,450 --> 00:02:36,500 Because we said here remember, column number zero, 48 49 00:02:36,500 --> 00:02:39,770 so this is the first column, right? 49 50 00:02:39,770 --> 00:02:42,497 If you want to, we can align it to the 50 51 00:02:42,497 --> 00:02:44,330 right side, how we can do that? 51 52 00:02:44,330 --> 00:02:47,010 To do that, here we need to use another property 52 53 00:02:47,010 --> 00:02:50,233 and it will sticky property, and here I will say, 53 54 00:02:50,233 --> 00:02:54,570 'sticky equals E', okay? 54 55 00:02:54,570 --> 00:02:57,723 And now it will be on the right side. 55 56 00:02:59,920 --> 00:03:02,647 And here something's wrong, why is it like that? 56 57 00:03:02,647 --> 00:03:04,253 Let me check it again. 57 58 00:03:05,090 --> 00:03:06,988 And here also what we need to use, 58 59 00:03:06,988 --> 00:03:09,233 we need to also use 'column span', okay? 59 60 00:03:09,233 --> 00:03:13,150 And because if we don't use 60 61 00:03:13,150 --> 00:03:15,120 'column span', it will stay here, 61 62 00:03:15,120 --> 00:03:17,603 so after 'sticky', I will say here, 62 63 00:03:18,580 --> 00:03:23,580 'column span equals two', 63 64 00:03:23,980 --> 00:03:24,820 okay? 64 65 00:03:24,820 --> 00:03:27,093 And if I run my application now again, 65 66 00:03:28,750 --> 00:03:31,050 as you see now, our check box is good, 66 67 00:03:31,050 --> 00:03:34,560 this place is good and it's on the right side, okay? 67 68 00:03:34,560 --> 00:03:38,290 So what I need to do now, here I want to create 68 69 00:03:38,290 --> 00:03:41,230 a function okay, for my button. 69 70 00:03:41,230 --> 00:03:44,040 When I hit this button, I want to get this value 70 71 00:03:44,040 --> 00:03:47,020 of the first entry and also the second entry, 71 72 00:03:47,020 --> 00:03:51,250 also I want to check if my check box is checked or not. 72 73 00:03:51,250 --> 00:03:53,020 Okay, so how can I do that? 73 74 00:03:53,020 --> 00:03:56,440 To do that I need to find my button first, 74 75 00:03:56,440 --> 00:03:58,220 my button is somewhere here, right? 75 76 00:03:58,220 --> 00:03:59,103 It was here, 76 77 00:04:01,972 --> 00:04:04,630 and check box, and my button is here, right? 77 78 00:04:04,630 --> 00:04:07,850 And even we can say here, 'button configure method', 78 79 00:04:07,850 --> 00:04:09,130 we can also use that, we don't 79 80 00:04:09,130 --> 00:04:10,780 have to go to our button. 80 81 00:04:10,780 --> 00:04:13,410 Or you can create your command property here, 81 82 00:04:13,410 --> 00:04:18,410 or also, you can use config method, sorry, here. 82 83 00:04:18,790 --> 00:04:21,943 So for the button, I say 'button dot config', okay? 83 84 00:04:25,120 --> 00:04:27,843 And here, what I need to say, I need to say here: 84 85 00:04:30,040 --> 00:04:35,001 'command equals', let's name it 'callback', okay? 85 86 00:04:35,001 --> 00:04:37,965 Our definition name is 'callback'. 86 87 00:04:37,965 --> 00:04:39,400 So what I need to do now, I need to create 87 88 00:04:39,400 --> 00:04:41,150 my callback function, right? 88 89 00:04:41,150 --> 00:04:44,503 Here I will come and say 'def callback' 89 90 00:04:47,447 --> 00:04:48,280 Okay? 90 91 00:04:48,280 --> 00:04:50,600 And here what I need to say, firstly 91 92 00:04:50,600 --> 00:04:54,680 I want to get my entry fields, okay? 92 93 00:04:54,680 --> 00:04:56,800 And the value of my entries. 93 94 00:04:56,800 --> 00:04:57,993 And here I will say, 94 95 00:05:00,364 --> 00:05:01,197 or 95 96 00:05:03,620 --> 00:05:04,560 what we can do, 96 97 00:05:04,560 --> 00:05:07,300 or something else, let's use here 'print', okay? 97 98 00:05:07,300 --> 00:05:10,397 And here I will say, 'your name', 98 99 00:05:11,640 --> 00:05:12,960 and our name will be, 99 100 00:05:12,960 --> 00:05:16,860 'plus symbol, entry dot get' okay? 100 101 00:05:16,860 --> 00:05:18,810 This is our first entry remember, 101 102 00:05:18,810 --> 00:05:21,230 and the other one is entry two, right? 102 103 00:05:21,230 --> 00:05:25,337 And I will print out my name in the first entry value. 103 104 00:05:25,337 --> 00:05:28,407 And for the second I will say 'your password', 104 105 00:05:31,739 --> 00:05:32,620 password, 105 106 00:05:32,620 --> 00:05:35,110 and here, colon after that here, and what I need to say, 106 107 00:05:35,110 --> 00:05:40,110 I need to say 'entry two dot get', okay? 107 108 00:05:40,530 --> 00:05:44,330 And for the check box what I need to do now here, 108 109 00:05:44,330 --> 00:05:46,930 now we have, remember, for the check box 109 110 00:05:46,930 --> 00:05:48,840 we have two options, the first one is 'checked', 110 111 00:05:48,840 --> 00:05:51,020 the other one is 'not checked', right? 111 112 00:05:51,020 --> 00:05:52,810 So here I need to check it. 112 113 00:05:52,810 --> 00:05:57,810 I will say here, 'if check box variable dot get', 113 114 00:05:57,940 --> 00:05:59,110 okay, 114 115 00:05:59,110 --> 00:06:02,320 equals, equals one, that means my check box is checked', 115 116 00:06:02,320 --> 00:06:03,153 okay? 116 117 00:06:03,153 --> 00:06:08,120 So I will say here, 'print, remember me selected' okay? 117 118 00:06:08,120 --> 00:06:09,770 Or checked, that doesn't matter. 118 119 00:06:09,770 --> 00:06:13,270 And if not, right, I will say: 'else'. 119 120 00:06:13,270 --> 00:06:16,420 For else, that means my variable value is zero, 120 121 00:06:16,420 --> 00:06:21,320 so I will say 'print not selected', 121 122 00:06:21,320 --> 00:06:22,890 okay? 122 123 00:06:22,890 --> 00:06:25,530 And here now, what I need to do, 123 124 00:06:25,530 --> 00:06:27,833 I will run my application. 124 125 00:06:29,870 --> 00:06:33,233 Now here for the name, I will say: 125 126 00:06:34,470 --> 00:06:35,597 let's say 'Volkan', 126 127 00:06:38,950 --> 00:06:40,930 and for the password, 'one, two, three, 127 128 00:06:40,930 --> 00:06:43,230 four, five, and six' now. 128 129 00:06:43,230 --> 00:06:45,570 Firstly, I will not check this check box, okay? 129 130 00:06:45,570 --> 00:06:48,950 And let's focus on here, our console okay? 130 131 00:06:48,950 --> 00:06:51,960 I hit the enter button, as you see now, 131 132 00:06:51,960 --> 00:06:54,140 what it says, your name is 'Volkan', 132 133 00:06:54,140 --> 00:06:56,480 your passowrd is 'one, two, three, four, 133 134 00:06:56,480 --> 00:06:59,090 five, and six', and not selected, right? 134 135 00:06:59,090 --> 00:07:00,493 So let's redo that. 135 136 00:07:01,560 --> 00:07:04,220 Password is okay, so I will run it again, 136 137 00:07:04,220 --> 00:07:06,770 and this time I will check my check box, okay? 137 138 00:07:06,770 --> 00:07:08,257 So again, let's say 'George', 138 139 00:07:10,070 --> 00:07:12,280 'one, two, three, four', okay? 139 140 00:07:12,280 --> 00:07:15,670 And 'remember me', okay, let's check it, 140 141 00:07:15,670 --> 00:07:17,883 and now I will hit the enter button. 141 142 00:07:18,920 --> 00:07:21,080 As you see now, it said your name is 'George', 142 143 00:07:21,080 --> 00:07:23,680 your password is 'one, two, three, four', 143 144 00:07:23,680 --> 00:07:25,070 remember me is selected. 144 145 00:07:25,070 --> 00:07:26,710 This is how we can use check boxes. 145 146 00:07:26,710 --> 00:07:28,710 For now that's all, see you in the next.