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Guido van Rossum
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c8564cde04
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0c89ec778d
10 changed files with 426 additions and 420 deletions
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@ -1,13 +1,11 @@
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# Module 'Sliders'
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#
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# XXX Should split caller interface, appearance and reactivity better
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import stdwin
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from stdwinevents import *
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import rect
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from Buttons import *
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from Resize import *
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from HVSplit import HSplit
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# Field indices in event detail
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@ -18,11 +16,13 @@ _BUTTON = 2
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_MASK = 3
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# A dragslider is the simplest possible slider.
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# DragSlider is the simplest possible slider.
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# It looks like a button but dragging the mouse left or right
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# changes the controlled value.
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# It does not support any of the triggers or hooks defined by Buttons,
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# but defines its own setval_trigger and setval_hook.
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#
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class DragSliderReactivity() = NoReactivity():
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class DragSliderReactivity() = BaseReactivity():
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#
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def mouse_down(self, detail):
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h, v = hv = detail[_HV]
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@ -43,136 +43,133 @@ class DragSliderReactivity() = NoReactivity():
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self.active = 0
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#
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class DragSliderAppearance() = NoResize(), ButtonAppearance():
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#
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def define(self, (win, bounds)):
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self.min = 0
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self.val = -1 # Changed by next setval call
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self.max = 100
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self.setval_hook = 0
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self.pretext = self.postext = ''
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self = ClassicButton.define(self, (win, bounds, ''))
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self.setval(50)
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return self
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class DragSliderAppearance() = ButtonAppearance():
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#
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# INVARIANTS maintained by the setval method:
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#
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# self.min <= self.val <= self.max
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# self.text = self.pretext + `self.val` + self.postext
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#
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# (Notice that unlike in Python ranges, the end point belongs
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# (Notice that unlike Python ranges, the end point belongs
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# to the range.)
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#
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def init_appearance(self):
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ButtonAppearance.init_appearance(self)
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self.min = 0
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self.val = 0
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self.max = 100
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self.hook = 0
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self.pretext = self.postext = ''
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self.recalctext()
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#
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# The 'get*' and 'set*' methods belong to the generic slider interface
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#
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def getval(self): return self.val
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#
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def sethook(self, hook):
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self.hook = hook
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#
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def setminvalmax(self, (min, val, max)):
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self.min = min
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self.max = max
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self.setval(val)
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#
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def settexts(self, (pretext, postext)):
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self.pretext = pretext
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self.postext = postext
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self.recalctext()
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#
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def setval(self, val):
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val = min(self.max, max(self.min, val))
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if val <> self.val:
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self.val = val
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self.setval_trigger()
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# (The trigger may change val, pretext and postext)
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self.settext(self.pretext + `self.val` + self.postext)
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self.recalctext()
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self.trigger()
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#
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def setval_trigger(self):
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if self.setval_hook:
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self.setval_hook(self)
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def trigger(self):
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if self.hook:
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self.hook(self)
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#
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def recalctext(self):
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self.settext(self.pretext + `self.val` + self.postext)
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#
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class DragSlider() = DragSliderReactivity(), DragSliderAppearance(): pass
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class DragSlider() = DragSliderReactivity(), DragSliderAppearance(), Define():
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def definetext(self, (parent, text)):
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raise RuntimeError, 'DragSlider.definetext() not supported'
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# Auxiliary class for DragSlider incorporated in ComplexSlider
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# Auxiliary class for PushButton incorporated in ComplexSlider
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#
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class _SubDragSlider() = DragSlider():
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def define(self, (win, bounds, parent)):
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self.parent = parent
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return DragSlider.define(self, (win, bounds))
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def setval_trigger(self):
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self.parent.val = self.val
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self.parent.setval_trigger()
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# Auxiliary class for ClassicButton incorporated in ComplexSlider
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#
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class _SubClassicButton() = ClassicButton():
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def define(self, (win, bounds, text, step, parent)):
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self.parent = parent
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class _StepButton() = PushButton():
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def define(self, parent):
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self = PushButton.define(self, parent)
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self.step = 0
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return self
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def setstep(self, step):
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self.step = step
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return ClassicButton.define(self, (win, bounds, text))
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def definetextstep(self, (parent, text, step)):
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self = self.definetext(parent, text)
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self.setstep(step)
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return self
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def init_reactivity(self):
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PushButton.init_reactivity(self)
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self.parent.need_timer(self)
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def step_trigger(self):
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self.parent.setval(self.parent.getval() + self.step)
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def down_trigger(self):
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self.parent.setval(self.parent.val + self.step)
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self.delay = 5
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self.win.settimer(self.delay)
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def move_trigger(self):
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self.win.settimer(self.delay)
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def timer_trigger(self):
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self.delay = 1
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self.parent.setval(self.parent.val + self.step)
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self.win.settimer(self.delay)
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self.step_trigger()
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self.parent.settimer(5)
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def timer(self):
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if self.hilited:
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self.step_trigger()
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if self.active:
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self.parent.settimer(1)
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# A complex slider is a wrapper around three buttons:
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# One to step down, a dragslider, and one to step up.
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# A complex slider is an HSplit initialized to three buttons:
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# one to step down, a dragslider, and one to step up.
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#
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class ComplexSlider() = NoResize(), LabelAppearance(), NoReactivity():
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class ComplexSlider() = HSplit():
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#
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def define(self, (win, bounds)):
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# Override Slider define() method
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#
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def define(self, parent):
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self = self.create(parent) # HSplit
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#
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self.win = win
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self.bounds = bounds
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self.setval_hook = 0
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#
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(left, top), (right, bottom) = bounds
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size = bottom - top
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#
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downbox = (left, top), (left+size, bottom)
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sliderbox = (left+size, top), (right-size, bottom)
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upbox = (right-size, top), (right, bottom)
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#
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self.downbutton = \
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_SubClassicButton().define(win, downbox, '-', -1, self)
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#
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self.sliderbutton = \
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_SubDragSlider().define(win, sliderbox, self)
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#
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self.upbutton = \
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_SubClassicButton().define(win, upbox, '+', 1, self)
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#
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self.min = self.sliderbutton.min
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self.val = self.sliderbutton.val
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self.max = self.sliderbutton.max
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self.pretext = self.sliderbutton.pretext
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self.postext = self.sliderbutton.postext
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#
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self.children = \
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[self.downbutton, self.sliderbutton, self.upbutton]
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self.downbutton = _StepButton().definetextstep(self, '-', -1)
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self.dragbutton = DragSlider().define(self)
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self.upbutton = _StepButton().definetextstep(self, '+', 1)
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#
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return self
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#
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def mouse_down(self, detail):
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for b in self.children:
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b.mouse_down(detail)
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# Override HSplit methods
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#
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def mouse_move(self, detail):
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for b in self.children:
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b.mouse_move(detail)
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def minsize(self, m):
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w1, h1 = self.downbutton.minsize(m)
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w2, h2 = self.dragbutton.minsize(m)
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w3, h3 = self.upbutton.minsize(m)
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height = max(h1, h2, h3)
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w1 = max(w1, height)
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w3 = max(w3, height)
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return w1+w2+w3, height
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#
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def mouse_up(self, detail):
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for b in self.children:
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b.mouse_up(detail)
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def setbounds(self, bounds):
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(left, top), (right, bottom) = self.bounds = bounds
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size = bottom - top
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self.downbutton.setbounds((left, top), (left+size, bottom))
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self.dragbutton.setbounds((left+size, top), \
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(right-size, bottom))
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self.upbutton.setbounds((right-size, top), (right, bottom))
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#
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def timer(self):
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for b in self.children:
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b.timer()
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#
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def draw(self, area):
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for b in self.children:
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b.draw(area)
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#
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def setval(self, val):
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self.sliderbutton.min = self.min
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self.sliderbutton.max = self.max
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self.sliderbutton.pretext = self.pretext
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self.sliderbutton.postext = self.postext
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self.sliderbutton.setval(val)
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#
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def setval_trigger(self):
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if self.setval_hook:
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self.setval_hook(self)
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# Pass other Slider methods on to dragbutton
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#
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def getval(self): return self.dragbutton.getval()
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def sethook(self, hook): self.dragbutton.sethook(hook)
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def setminvalmax(self, args): self.dragbutton.setminvalmax(args)
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def settexts(self, args): self.dragbutton.settexts(args)
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def setval(self, val): self.dragbutton.setval(val)
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def enable(self, flag):
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self.downbutton.enable(flag)
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self.dragbutton.enable(flag)
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self.upbutton.enable(flag)
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