how to make a text input box python pygame

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27 Jul 2018

1import pygame as pg
2
3
4pg.init()
5screen = pg.display.set_mode((640, 480))
6COLOR_INACTIVE = pg.Color('lightskyblue3')
7COLOR_ACTIVE = pg.Color('dodgerblue2')
8FONT = pg.font.Font(None, 32)
9
10
11class InputBox:
12
13    def __init__(self, x, y, w, h, text=''):
14        self.rect = pg.Rect(x, y, w, h)
15        self.color = COLOR_INACTIVE
16        self.text = text
17        self.txt_surface = FONT.render(text, True, self.color)
18        self.active = False
19
20    def handle_event(self, event):
21        if event.type == pg.MOUSEBUTTONDOWN:
22            # If the user clicked on the input_box rect.
23            if self.rect.collidepoint(event.pos):
24                # Toggle the active variable.
25                self.active = not self.active
26            else:
27                self.active = False
28            # Change the current color of the input box.
29            self.color = COLOR_ACTIVE if self.active else COLOR_INACTIVE
30        if event.type == pg.KEYDOWN:
31            if self.active:
32                if event.key == pg.K_RETURN:
33                    print(self.text)
34                    self.text = ''
35                elif event.key == pg.K_BACKSPACE:
36                    self.text = self.text[:-1]
37                else:
38                    self.text += event.unicode
39                # Re-render the text.
40                self.txt_surface = FONT.render(self.text, True, self.color)
41
42    def update(self):
43        # Resize the box if the text is too long.
44        width = max(200, self.txt_surface.get_width()+10)
45        self.rect.w = width
46
47    def draw(self, screen):
48        # Blit the text.
49        screen.blit(self.txt_surface, (self.rect.x+5, self.rect.y+5))
50        # Blit the rect.
51        pg.draw.rect(screen, self.color, self.rect, 2)
52
53
54
55def main():
56    clock = pg.time.Clock()
57    input_box1 = InputBox(100, 100, 140, 32)
58    input_box2 = InputBox(100, 300, 140, 32)
59    input_boxes = [input_box1, input_box2]
60    done = False
61
62    while not done:
63        for event in pg.event.get():
64            if event.type == pg.QUIT:
65                done = True
66            for box in input_boxes:
67                box.handle_event(event)
68
69        for box in input_boxes:
70            box.update()
71
72        screen.fill((30, 30, 30))
73        for box in input_boxes:
74            box.draw(screen)
75
76        pg.display.flip()
77        clock.tick(30)
78
79
80if __name__ == '__main__':
81    main()
82    pg.quit()

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