kopia lustrzana https://github.com/villares/sketch-a-day
75 wiersze
2.3 KiB
Python
75 wiersze
2.3 KiB
Python
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"""
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Slider code by Peter Farell
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htts://twitter.com/hackingmath
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http://farrellpolymath.com/
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Get the most recent version here:
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https://github.com/hackingmath/python-sliders
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"""
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# USAGE:
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#>from slider import Slider
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#
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# Outside the setup function I created the slider object:
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#
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#>slider1 = Slider(0,20,6)
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#
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# You have to tell it the range of the slider (in this case 0 to 20)
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# and the default value, when the program first runs (in this case, 6).
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#
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# Inside the setup function you give it a position on the screen:
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#
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#>slider1.position(20,20)
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#
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# Finally in the draw function you assign the value of the slider to a variable and work with it interactively. I just wanted to show it was returning and updating the value, so I just printed it out in the console:
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#
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#>num = slider1.value()
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#>println(num)
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#
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class Slider:
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def __init__(self, low, high, default):
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'''slider has range from low to high
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and is set to default'''
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self.low = low
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self.high = high
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self.val = default
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self.clicked = False
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def position(self, x, y):
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'''slider's position on screen'''
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self.x = x
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self.y = y
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# the position of the rect you slide:
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self.rectx = self.x + map(self.val, self.low, self.high, 0, 120)
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self.recty = self.y - 10
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def value(self):
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'''updates the slider and returns value'''
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pushStyle()
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rectMode(CENTER)
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# black translucid rect behind slider
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fill(0, 100)
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stroke(0)
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rect(self.x + 60, self.y, 130, 20)
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# gray line behind slider
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strokeWeight(4)
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stroke(200)
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line(self.x, self.y, self.x + 120, self.y)
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# press mouse to move slider
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if dist(mouseX, mouseY, self.rectx + 5, self.recty + 10) < 20:
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fill(200)
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textSize(10)
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text(int(self.val), self.rectx, self.recty + 35)
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if mousePressed:
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self.rectx = mouseX
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# constrain rectangle
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self.rectx = constrain(self.rectx, self.x, self.x + 120)
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# draw rectangle
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strokeWeight(1)
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fill(255)
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rect(self.rectx, self.recty + 10, 10, 20)
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self.val = map(self.rectx, self.x, self.x + 120, self.low, self.high)
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# draw label
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popStyle()
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return self.val
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