412 lines
9.5 KiB
Python
412 lines
9.5 KiB
Python
# Module 'Buttons'
|
|
|
|
|
|
# Import module 'rect' renamed as '_rect' to avoid exporting it on
|
|
# 'from Buttons import *'
|
|
#
|
|
import rect
|
|
_rect = rect
|
|
del rect
|
|
|
|
|
|
# Field indices in mouse event detail
|
|
#
|
|
_HV = 0
|
|
_CLICKS = 1
|
|
_BUTTON = 2
|
|
_MASK = 3
|
|
|
|
|
|
# LabelAppearance provides defaults for all appearance methods.
|
|
# selected state not visible
|
|
# disabled --> crossed out
|
|
# hilited --> inverted
|
|
#
|
|
class LabelAppearance:
|
|
#
|
|
# Initialization
|
|
#
|
|
def init_appearance(self):
|
|
self.bounds = _rect.empty
|
|
self.enabled = 1
|
|
self.hilited = 0
|
|
self.selected = 0
|
|
self.text = ''
|
|
#
|
|
# Size enquiry
|
|
#
|
|
def getminsize(self, (m, (width, height))):
|
|
width = max(width, m.textwidth(self.text) + 6)
|
|
height = max(height, m.lineheight() + 6)
|
|
return width, height
|
|
#
|
|
def getbounds(self):
|
|
return self.bounds
|
|
#
|
|
# Changing the parameters
|
|
#
|
|
def settext(self, text):
|
|
self.text = text
|
|
if self.bounds <> _rect.empty:
|
|
self.recalctextpos()
|
|
self.redraw()
|
|
#
|
|
def setbounds(self, bounds):
|
|
self.bounds = bounds
|
|
if self.bounds <> _rect.empty:
|
|
self.recalc()
|
|
#
|
|
def realize(self):
|
|
pass
|
|
#
|
|
# Changing the state bits
|
|
#
|
|
def enable(self, flag):
|
|
if flag <> self.enabled:
|
|
self.enabled = flag
|
|
if self.bounds <> _rect.empty:
|
|
self.flipenable(self.parent.begindrawing())
|
|
#
|
|
def hilite(self, flag):
|
|
if flag <> self.hilited:
|
|
self.hilited = flag
|
|
if self.bounds <> _rect.empty:
|
|
self.fliphilite(self.parent.begindrawing())
|
|
#
|
|
def select(self, flag):
|
|
if flag <> self.selected:
|
|
self.selected = flag
|
|
if self.bounds <> _rect.empty:
|
|
self.redraw()
|
|
#
|
|
# Recalculate the box bounds and text position.
|
|
# This can be overridden by buttons that draw different boxes
|
|
# or want their text in a different position.
|
|
#
|
|
def recalc(self):
|
|
if self.bounds <> _rect.empty:
|
|
self.recalcbounds()
|
|
self.recalctextpos()
|
|
#
|
|
def recalcbounds(self):
|
|
self.hilitebounds = _rect.inset(self.bounds, (3, 3))
|
|
self.crossbounds = self.bounds
|
|
#
|
|
def recalctextpos(self):
|
|
(left, top), (right, bottom) = self.bounds
|
|
m = self.parent.beginmeasuring()
|
|
h = (left + right - m.textwidth(self.text)) / 2
|
|
v = (top + bottom - m.lineheight()) / 2
|
|
self.textpos = h, v
|
|
#
|
|
# Generic drawing interface.
|
|
# Do not override redraw() or draw() methods; override drawit() c.s.
|
|
#
|
|
def redraw(self):
|
|
if self.bounds <> _rect.empty:
|
|
d = self.parent.begindrawing()
|
|
d.erase(self.bounds)
|
|
self.draw(d, self.bounds)
|
|
#
|
|
def draw(self, (d, area)):
|
|
area = _rect.intersect(area, self.bounds)
|
|
if area = _rect.empty:
|
|
return
|
|
d.cliprect(area)
|
|
self.drawit(d)
|
|
d.noclip()
|
|
#
|
|
# The drawit() method is fairly generic but may be overridden.
|
|
#
|
|
def drawit(self, d):
|
|
self.drawpict(d)
|
|
if self.text:
|
|
d.text(self.textpos, self.text)
|
|
if not self.enabled:
|
|
self.flipenable(d)
|
|
if self.hilited:
|
|
self.fliphilite(d)
|
|
#
|
|
# Default drawing detail functions.
|
|
# Overriding these is normally sufficient to get different
|
|
# appearances.
|
|
#
|
|
def drawpict(self, d):
|
|
pass
|
|
#
|
|
def flipenable(self, d):
|
|
_xorcross(d, self.crossbounds)
|
|
#
|
|
def fliphilite(self, d):
|
|
d.invert(self.hilitebounds)
|
|
|
|
|
|
# A Strut is a label with no width of its own.
|
|
|
|
class StrutAppearance(LabelAppearance):
|
|
#
|
|
def getminsize(self, (m, (width, height))):
|
|
height = max(height, m.lineheight() + 6)
|
|
return width, height
|
|
#
|
|
|
|
|
|
# ButtonAppearance displays a centered string in a box.
|
|
# selected --> bold border
|
|
# disabled --> crossed out
|
|
# hilited --> inverted
|
|
#
|
|
class ButtonAppearance(LabelAppearance):
|
|
#
|
|
def drawpict(self, d):
|
|
d.box(_rect.inset(self.bounds, (1, 1)))
|
|
if self.selected:
|
|
# Make a thicker box
|
|
d.box(self.bounds)
|
|
d.box(_rect.inset(self.bounds, (2, 2)))
|
|
d.box(_rect.inset(self.bounds, (3, 3)))
|
|
#
|
|
|
|
|
|
# CheckAppearance displays a small square box and a left-justified string.
|
|
# selected --> a cross appears in the box
|
|
# disabled --> whole button crossed out
|
|
# hilited --> box is inverted
|
|
#
|
|
class CheckAppearance(LabelAppearance):
|
|
#
|
|
def getminsize(self, (m, (width, height))):
|
|
minwidth = m.textwidth(self.text) + 6
|
|
minheight = m.lineheight() + 6
|
|
width = max(width, minwidth + minheight + m.textwidth(' '))
|
|
height = max(height, minheight)
|
|
return width, height
|
|
#
|
|
def drawpict(self, d):
|
|
d.box(self.boxbounds)
|
|
if self.selected: _xorcross(d, self.boxbounds)
|
|
#
|
|
def recalcbounds(self):
|
|
LabelAppearance.recalcbounds(self)
|
|
(left, top), (right, bottom) = self.bounds
|
|
self.size = bottom - top - 4
|
|
self.boxbounds = (left+2, top+2), (left+2+self.size, bottom-2)
|
|
self.hilitebounds = self.boxbounds
|
|
#
|
|
def recalctextpos(self):
|
|
m = self.parent.beginmeasuring()
|
|
(left, top), (right, bottom) = self.boxbounds
|
|
h = right + m.textwidth(' ')
|
|
v = top + (self.size - m.lineheight()) / 2
|
|
self.textpos = h, v
|
|
#
|
|
|
|
|
|
# RadioAppearance displays a round indicator and a left-justified string.
|
|
# selected --> a dot appears in the indicator
|
|
# disabled --> whole button crossed out
|
|
# hilited --> indicator is inverted
|
|
#
|
|
class RadioAppearance(CheckAppearance):
|
|
#
|
|
def drawpict(self, d):
|
|
(left, top), (right, bottom) = self.boxbounds
|
|
radius = self.size / 2
|
|
center = left + radius, top + radius
|
|
d.circle(center, radius)
|
|
if self.selected:
|
|
d.fillcircle(center, radius*3/5)
|
|
#
|
|
|
|
|
|
# NoReactivity ignores mouse events.
|
|
#
|
|
class NoReactivity:
|
|
def init_reactivity(self): pass
|
|
|
|
|
|
# BaseReactivity defines hooks and asks for mouse events,
|
|
# but provides only dummy mouse event handlers.
|
|
# The trigger methods call the corresponding hooks set by the user.
|
|
# Hooks (and triggers) mean the following:
|
|
# down_hook called on some mouse-down events
|
|
# move_hook called on some mouse-move events
|
|
# up_hook called on mouse-up events
|
|
# on_hook called for buttons with on/off state, when it goes on
|
|
# hook called when a button 'fires' or a radiobutton goes on
|
|
# There are usually extra conditions, e.g., hooks are only called
|
|
# when the button is enabled, or active, or selected (on).
|
|
#
|
|
class BaseReactivity:
|
|
#
|
|
def init_reactivity(self):
|
|
self.down_hook = self.move_hook = self.up_hook = \
|
|
self.on_hook = self.off_hook = \
|
|
self.hook = self.active = 0
|
|
self.parent.need_mouse(self)
|
|
#
|
|
def mousetest(self, hv):
|
|
return _rect.pointinrect(hv, self.bounds)
|
|
#
|
|
def mouse_down(self, detail):
|
|
pass
|
|
#
|
|
def mouse_move(self, detail):
|
|
pass
|
|
#
|
|
def mouse_up(self, detail):
|
|
pass
|
|
#
|
|
def down_trigger(self):
|
|
if self.down_hook: self.down_hook(self)
|
|
#
|
|
def move_trigger(self):
|
|
if self.move_hook: self.move_hook(self)
|
|
#
|
|
def up_trigger(self):
|
|
if self.up_hook: self.up_hook(self)
|
|
#
|
|
def on_trigger(self):
|
|
if self.on_hook: self.on_hook(self)
|
|
#
|
|
def off_trigger(self):
|
|
if self.off_hook: self.off_hook(self)
|
|
#
|
|
def trigger(self):
|
|
if self.hook: self.hook(self)
|
|
|
|
|
|
# ToggleReactivity acts like a simple pushbutton.
|
|
# It toggles its hilite state on mouse down events.
|
|
#
|
|
class ToggleReactivity(BaseReactivity):
|
|
#
|
|
def mouse_down(self, detail):
|
|
if self.enabled and self.mousetest(detail[_HV]):
|
|
self.active = 1
|
|
self.hilite(not self.hilited)
|
|
self.down_trigger()
|
|
#
|
|
def mouse_move(self, detail):
|
|
if self.active:
|
|
self.move_trigger()
|
|
#
|
|
def mouse_up(self, detail):
|
|
if self.active:
|
|
self.up_trigger()
|
|
self.active = 0
|
|
#
|
|
def down_trigger(self):
|
|
if self.hilited:
|
|
self.on_trigger()
|
|
else:
|
|
self.off_trigger()
|
|
self.trigger()
|
|
#
|
|
|
|
|
|
# TriggerReactivity acts like a fancy pushbutton.
|
|
# It hilites itself while the mouse is down within its bounds.
|
|
#
|
|
class TriggerReactivity(BaseReactivity):
|
|
#
|
|
def mouse_down(self, detail):
|
|
if self.enabled and self.mousetest(detail[_HV]):
|
|
self.active = 1
|
|
self.hilite(1)
|
|
self.down_trigger()
|
|
#
|
|
def mouse_move(self, detail):
|
|
if self.active:
|
|
self.hilite(self.mousetest(detail[_HV]))
|
|
if self.hilited:
|
|
self.move_trigger()
|
|
#
|
|
def mouse_up(self, detail):
|
|
if self.active:
|
|
self.hilite(self.mousetest(detail[_HV]))
|
|
if self.hilited:
|
|
self.up_trigger()
|
|
self.trigger()
|
|
self.active = 0
|
|
self.hilite(0)
|
|
#
|
|
|
|
|
|
# CheckReactivity handles mouse events like TriggerReactivity,
|
|
# It overrides the up_trigger method to flip its selected state.
|
|
#
|
|
class CheckReactivity(TriggerReactivity):
|
|
#
|
|
def up_trigger(self):
|
|
self.select(not self.selected)
|
|
if self.selected:
|
|
self.on_trigger()
|
|
else:
|
|
self.off_trigger()
|
|
self.trigger()
|
|
|
|
|
|
# RadioReactivity turns itself on and the other buttons in its group
|
|
# off when its up_trigger method is called.
|
|
#
|
|
class RadioReactivity(TriggerReactivity):
|
|
#
|
|
def init_reactivity(self):
|
|
TriggerReactivity.init_reactivity(self)
|
|
self.group = []
|
|
#
|
|
def up_trigger(self):
|
|
for b in self.group:
|
|
if b <> self:
|
|
if b.selected:
|
|
b.select(0)
|
|
b.off_trigger()
|
|
self.select(1)
|
|
self.on_trigger()
|
|
self.trigger()
|
|
|
|
|
|
# Auxiliary class for 'define' method.
|
|
# Call the initializers in the right order.
|
|
#
|
|
class Define:
|
|
#
|
|
def define(self, parent):
|
|
self.parent = parent
|
|
parent.addchild(self)
|
|
self.init_appearance()
|
|
self.init_reactivity()
|
|
return self
|
|
#
|
|
def destroy(self):
|
|
self.parent = 0
|
|
#
|
|
def definetext(self, (parent, text)):
|
|
self = self.define(parent)
|
|
self.settext(text)
|
|
return self
|
|
|
|
|
|
# Subroutine to cross out a rectangle.
|
|
#
|
|
def _xorcross(d, bounds):
|
|
((left, top), (right, bottom)) = bounds
|
|
# This is s bit funny to make it look better
|
|
left = left + 2
|
|
right = right - 2
|
|
top = top + 2
|
|
bottom = bottom - 3
|
|
d.xorline(((left, top), (right, bottom)))
|
|
d.xorline((left, bottom), (right, top))
|
|
|
|
|
|
# Ready-made button classes.
|
|
#
|
|
class Label(NoReactivity, LabelAppearance, Define): pass
|
|
class Strut(NoReactivity, StrutAppearance, Define): pass
|
|
class PushButton(TriggerReactivity, ButtonAppearance, Define): pass
|
|
class CheckButton(CheckReactivity, CheckAppearance, Define): pass
|
|
class RadioButton(RadioReactivity, RadioAppearance, Define): pass
|
|
class ToggleButton(ToggleReactivity, ButtonAppearance, Define): pass
|