kopia lustrzana https://github.com/villares/sketch-a-day
74 wiersze
2.1 KiB
Python
74 wiersze
2.1 KiB
Python
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"""
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Slider code based on Peter Farell's htts://twitter.com/hackingmath
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https://github.com/hackingmath/python-sliders http://farrellpolymath.com/
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"""
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class Slider:
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SLIDERS = []
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def __init__(self, low, high, default, more_key, less_key):
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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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self.more = more_key
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self.less = less_key
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Slider.SLIDERS.append(self)
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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 update(self):
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'''updates the slider'''
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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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noStroke()
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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 (self.x < mouseX < self.x + 120 and
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self.y < mouseY < self.y + 20):
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fill(250)
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textSize(10)
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text(str(self.val), self.rectx, self.recty + 35)
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if mousePressed:
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self.rectx = mouseX
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# key usage
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if keyPressed:
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if key == self.more:
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self.rectx += 1
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if key == self.less:
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self.rectx -= 1
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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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popStyle()
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def value(self):
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''' backwards compatible method... '''
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self.update()
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return self.val
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@classmethod
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def update_all(cls):
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for slider in Slider.SLIDERS:
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slider.update()
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