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Kaydet (Commit) ceae528b authored tarafından Guido van Rossum's avatar Guido van Rossum
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Generalizations.

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Lib/lib-stdwin/Buttons.py
Dosyayı görüntüle @ ceae528b
# Module 'Buttons' -- see README
#
# Module functionality is now split in two parts:
# - 'appearance' defines what it looks like
# - 'reactivity' defines how it acts to mouse events
# Module 'Buttons'
# Import module 'rect' renamed as '_rect'
......@@ -20,32 +16,42 @@ _BUTTON = 2
_MASK = 3
# BaseAppearance provides defaults for all appearance methods.
# In fact it looks like a label.
# LabelAppearance provides defaults for all appearance methods.
# selected state not visible
# disabled --> crossed out
# hilited --> inverted
#
class BaseAppearance():
class LabelAppearance():
#
# Initialization
#
def init_appearance(self, (win, bounds)):
win.change(bounds)
self.win = win
self.bounds = bounds
self.enabled = 1
self.hilited = 0
self.selected = 0
self.text = ''
self.limbo = 1
self.recalc()
self.win.change(self.bounds)
# While the limbo flag is set, redraw calls are ignored.
# It is cleared by the first draw event.
# This is intended to avoid duplicate drawing during
# initialization.
#
# Changing the parameters
#
def settext(self, text):
self.text = text
self.recalctextpos()
self.redraw()
#
def setbounds(self, bounds):
# This elays drawing until after all buttons are moved
# This delays drawing until after all buttons are moved
self.win.change(self.bounds)
self.bounds = bounds
self.recalc()
self.win.change(bounds)
#
# Changing the state bits
......@@ -53,25 +59,54 @@ class BaseAppearance():
def enable(self, flag):
if flag <> self.enabled:
self.enabled = flag
self.flipenable(self.win.begindrawing())
if not self.limbo:
self.flipenable(self.win.begindrawing())
#
def hilite(self, flag):
if flag <> self.hilited:
self.hilited = flag
self.fliphilite(self.win.begindrawing())
if not self.limbo:
self.fliphilite(self.win.begindrawing())
#
def select(self, flag):
if flag <> self.selected:
self.selected = flag
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):
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
d = self.win.begindrawing()
h = (left + right - d.textwidth(self.text)) / 2
v = (top + bottom - d.lineheight()) / 2
self.textpos = h, v
#
# Resize method.
# Override for widgets that take over window geomtry management.
#
def resize(self):
pass
#
# Generic drawing mechanism.
# There should be no reason to override redraw() or draw() methods.
# Do not override redraw() or draw() methods; override drawit() c.s.
#
def redraw(self):
self.draw(self.win.begindrawing(), self.bounds)
if not self.limbo:
self.draw(self.win.begindrawing(), self.bounds)
#
def draw(self, (d, area)):
self.limbo = 0
area = _rect.intersect(area, self.bounds)
if area = _rect.empty:
return
......@@ -83,10 +118,9 @@ class BaseAppearance():
# The drawit() method is fairly generic but may be overridden.
#
def drawit(self, d):
self.drawpict(d) # Box, circle etc.; also 'selected'
self.drawpict(d)
if self.text:
hv = self.textpos(d)
d.text(hv, self.text)
d.text(self.textpos, self.text)
if not self.enabled:
self.flipenable(d)
if self.hilited:
......@@ -95,52 +129,15 @@ class BaseAppearance():
# Default drawing detail functions.
# Overriding these is normally sufficient to get different
# appearances.
# No picture; centered text; enable crosses out; hilite inverts.
#
def drawpict(self, d):
pass
#
def textpos(self, d):
# XXX shouldn't this be done once by init/settext()?
(left, top), (right, bottom) = self.bounds
h = (left + right - d.textwidth(self.text)) / 2
v = (top + bottom - d.lineheight()) / 2
return h, v
#
def flipenable(self, d):
_xorcross(d, self.bounds)
_xorcross(d, self.crossbounds)
#
def fliphilite(self, d):
d.invert(_rect.inset(self.bounds, (3, 3)))
# Subroutine to cross out a rectangle.
#
def _xorcross(d, bounds):
((left, top), (right, bottom)) = bounds
left = left + 2
right = right - 2
top = top + 2
bottom = bottom - 3
d.xorline(((left, top), (right, bottom)))
d.xorline((left, bottom), (right, top))
# LabelAppearance displays a centered string.
# selected --> underlined
# disabled --> crossed out
# hilited --> inverted
#
class LabelAppearance() = BaseAppearance():
#
def drawpict(self, d):
if self.selected:
# Underline it
d.line((left+1, bottom-1), (right-1, bottom-1))
#
if not self.enabled: self._crossout(d)
if self.hilited: self._invert(d)
#
d.invert(self.hilitebounds)
# ButtonAppearance displays a centered string in a box.
......@@ -148,7 +145,7 @@ class LabelAppearance() = BaseAppearance():
# disabled --> crossed out
# hilited --> inverted
#
class ButtonAppearance() = BaseAppearance():
class ButtonAppearance() = LabelAppearance():
#
def drawpict(self, d):
d.box(_rect.inset(self.bounds, (1, 1)))
......@@ -165,27 +162,25 @@ class ButtonAppearance() = BaseAppearance():
# disabled --> whole button crossed out
# hilited --> box is inverted
#
class CheckAppearance() = BaseAppearance():
class CheckAppearance() = LabelAppearance():
#
def drawpict(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
boxbounds = (left, top), (left+size, bottom)
d.box(boxbounds)
if self.selected: _xorcross(d, boxbounds)
d.box(self.boxbounds)
if self.selected: _xorcross(d, self.boxbounds)
#
def textpos(self, d):
def recalcbounds(self):
LabelAppearance.recalcbounds(self)
(left, top), (right, bottom) = self.bounds
size = bottom - top
h = left + size + d.textwidth(' ')
v = top + (size - d.lineheight()) / 2
return h, v
self.size = bottom - top - 4
self.boxbounds = (left+2, top+2), (left+2+self.size, bottom-2)
self.hilitebounds = self.boxbounds
#
def fliphilite(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
boxbounds = (left, top), (left+size, bottom)
d.invert(boxbounds)
def recalctextpos(self):
d = self.win.begindrawing()
(left, top), (right, bottom) = self.boxbounds
h = right + d.textwidth(' ')
v = top + (self.size - d.lineheight()) / 2
self.textpos = h, v
#
......@@ -194,37 +189,24 @@ class CheckAppearance() = BaseAppearance():
# disabled --> whole button crossed out
# hilited --> indicator is inverted
#
class RadioAppearance() = BaseAppearance():
class RadioAppearance() = CheckAppearance():
#
def drawpict(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
radius = size / 2
(left, top), (right, bottom) = self.boxbounds
radius = self.size / 2
h, v = left + radius, top + radius
d.circle((h, v), radius - 1)
d.circle((h, v), radius)
if self.selected:
some = radius/3
d.paint((h-some, v-some), (h+some, v+some))
#
def textpos(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
h = left + size + d.textwidth(' ')
v = top + (size - d.lineheight()) / 2
return h, v
#
def fliphilite(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
d.invert((left, top), (left + size, bottom))
#
# NoReactivity ignores mouse and timer events.
# 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
# active_hook called on some mouse-move 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
# timer_hook called on timer events
......@@ -235,7 +217,7 @@ class RadioAppearance() = BaseAppearance():
class NoReactivity():
#
def init_reactivity(self):
self.down_hook = self.active_hook = self.up_hook = \
self.down_hook = self.move_hook = self.up_hook = \
self.on_hook = self.off_hook = self.timer_hook = \
self.hook = self.active = 0
#
......@@ -257,8 +239,8 @@ class NoReactivity():
def down_trigger(self):
if self.down_hook: self.down_hook(self)
#
def active_trigger(self):
if self.active_hook: self.active_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)
......@@ -290,7 +272,7 @@ class ToggleReactivity() = NoReactivity():
#
def mouse_move(self, detail):
if self.active:
self.active_trigger()
self.move_trigger()
#
def mouse_up(self, detail):
if self.active:
......@@ -325,7 +307,7 @@ class TriggerReactivity() = NoReactivity():
if self.active:
self.hilite(self.mousetest(detail[_HV]))
if self.hilited:
self.active_trigger()
self.move_trigger()
#
def mouse_up(self, detail):
if self.active:
......@@ -338,7 +320,7 @@ class TriggerReactivity() = NoReactivity():
#
def timer(self):
if self.active and self.hilited:
self.active_trigger()
self.timer_trigger()
#
......@@ -382,14 +364,27 @@ class Define():
#
def define(self, (win, bounds, text)):
self.init_appearance(win, bounds)
self.text = text
self.init_reactivity()
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 BaseButton() = NoReactivity(), BaseAppearance(), Define(): pass
class BaseButton() = NoReactivity(), LabelAppearance(), Define(): pass
class Label() = NoReactivity(), LabelAppearance(), Define(): pass
class ClassicButton() = TriggerReactivity(), ButtonAppearance(), Define(): pass
class CheckButton() = CheckReactivity(), CheckAppearance(), Define(): pass
......
Lib/stdwin/Buttons.py
Dosyayı görüntüle @ ceae528b
# Module 'Buttons' -- see README
#
# Module functionality is now split in two parts:
# - 'appearance' defines what it looks like
# - 'reactivity' defines how it acts to mouse events
# Module 'Buttons'
# Import module 'rect' renamed as '_rect'
......@@ -20,32 +16,42 @@ _BUTTON = 2
_MASK = 3
# BaseAppearance provides defaults for all appearance methods.
# In fact it looks like a label.
# LabelAppearance provides defaults for all appearance methods.
# selected state not visible
# disabled --> crossed out
# hilited --> inverted
#
class BaseAppearance():
class LabelAppearance():
#
# Initialization
#
def init_appearance(self, (win, bounds)):
win.change(bounds)
self.win = win
self.bounds = bounds
self.enabled = 1
self.hilited = 0
self.selected = 0
self.text = ''
self.limbo = 1
self.recalc()
self.win.change(self.bounds)
# While the limbo flag is set, redraw calls are ignored.
# It is cleared by the first draw event.
# This is intended to avoid duplicate drawing during
# initialization.
#
# Changing the parameters
#
def settext(self, text):
self.text = text
self.recalctextpos()
self.redraw()
#
def setbounds(self, bounds):
# This elays drawing until after all buttons are moved
# This delays drawing until after all buttons are moved
self.win.change(self.bounds)
self.bounds = bounds
self.recalc()
self.win.change(bounds)
#
# Changing the state bits
......@@ -53,25 +59,54 @@ class BaseAppearance():
def enable(self, flag):
if flag <> self.enabled:
self.enabled = flag
self.flipenable(self.win.begindrawing())
if not self.limbo:
self.flipenable(self.win.begindrawing())
#
def hilite(self, flag):
if flag <> self.hilited:
self.hilited = flag
self.fliphilite(self.win.begindrawing())
if not self.limbo:
self.fliphilite(self.win.begindrawing())
#
def select(self, flag):
if flag <> self.selected:
self.selected = flag
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):
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
d = self.win.begindrawing()
h = (left + right - d.textwidth(self.text)) / 2
v = (top + bottom - d.lineheight()) / 2
self.textpos = h, v
#
# Resize method.
# Override for widgets that take over window geomtry management.
#
def resize(self):
pass
#
# Generic drawing mechanism.
# There should be no reason to override redraw() or draw() methods.
# Do not override redraw() or draw() methods; override drawit() c.s.
#
def redraw(self):
self.draw(self.win.begindrawing(), self.bounds)
if not self.limbo:
self.draw(self.win.begindrawing(), self.bounds)
#
def draw(self, (d, area)):
self.limbo = 0
area = _rect.intersect(area, self.bounds)
if area = _rect.empty:
return
......@@ -83,10 +118,9 @@ class BaseAppearance():
# The drawit() method is fairly generic but may be overridden.
#
def drawit(self, d):
self.drawpict(d) # Box, circle etc.; also 'selected'
self.drawpict(d)
if self.text:
hv = self.textpos(d)
d.text(hv, self.text)
d.text(self.textpos, self.text)
if not self.enabled:
self.flipenable(d)
if self.hilited:
......@@ -95,52 +129,15 @@ class BaseAppearance():
# Default drawing detail functions.
# Overriding these is normally sufficient to get different
# appearances.
# No picture; centered text; enable crosses out; hilite inverts.
#
def drawpict(self, d):
pass
#
def textpos(self, d):
# XXX shouldn't this be done once by init/settext()?
(left, top), (right, bottom) = self.bounds
h = (left + right - d.textwidth(self.text)) / 2
v = (top + bottom - d.lineheight()) / 2
return h, v
#
def flipenable(self, d):
_xorcross(d, self.bounds)
_xorcross(d, self.crossbounds)
#
def fliphilite(self, d):
d.invert(_rect.inset(self.bounds, (3, 3)))
# Subroutine to cross out a rectangle.
#
def _xorcross(d, bounds):
((left, top), (right, bottom)) = bounds
left = left + 2
right = right - 2
top = top + 2
bottom = bottom - 3
d.xorline(((left, top), (right, bottom)))
d.xorline((left, bottom), (right, top))
# LabelAppearance displays a centered string.
# selected --> underlined
# disabled --> crossed out
# hilited --> inverted
#
class LabelAppearance() = BaseAppearance():
#
def drawpict(self, d):
if self.selected:
# Underline it
d.line((left+1, bottom-1), (right-1, bottom-1))
#
if not self.enabled: self._crossout(d)
if self.hilited: self._invert(d)
#
d.invert(self.hilitebounds)
# ButtonAppearance displays a centered string in a box.
......@@ -148,7 +145,7 @@ class LabelAppearance() = BaseAppearance():
# disabled --> crossed out
# hilited --> inverted
#
class ButtonAppearance() = BaseAppearance():
class ButtonAppearance() = LabelAppearance():
#
def drawpict(self, d):
d.box(_rect.inset(self.bounds, (1, 1)))
......@@ -165,27 +162,25 @@ class ButtonAppearance() = BaseAppearance():
# disabled --> whole button crossed out
# hilited --> box is inverted
#
class CheckAppearance() = BaseAppearance():
class CheckAppearance() = LabelAppearance():
#
def drawpict(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
boxbounds = (left, top), (left+size, bottom)
d.box(boxbounds)
if self.selected: _xorcross(d, boxbounds)
d.box(self.boxbounds)
if self.selected: _xorcross(d, self.boxbounds)
#
def textpos(self, d):
def recalcbounds(self):
LabelAppearance.recalcbounds(self)
(left, top), (right, bottom) = self.bounds
size = bottom - top
h = left + size + d.textwidth(' ')
v = top + (size - d.lineheight()) / 2
return h, v
self.size = bottom - top - 4
self.boxbounds = (left+2, top+2), (left+2+self.size, bottom-2)
self.hilitebounds = self.boxbounds
#
def fliphilite(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
boxbounds = (left, top), (left+size, bottom)
d.invert(boxbounds)
def recalctextpos(self):
d = self.win.begindrawing()
(left, top), (right, bottom) = self.boxbounds
h = right + d.textwidth(' ')
v = top + (self.size - d.lineheight()) / 2
self.textpos = h, v
#
......@@ -194,37 +189,24 @@ class CheckAppearance() = BaseAppearance():
# disabled --> whole button crossed out
# hilited --> indicator is inverted
#
class RadioAppearance() = BaseAppearance():
class RadioAppearance() = CheckAppearance():
#
def drawpict(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
radius = size / 2
(left, top), (right, bottom) = self.boxbounds
radius = self.size / 2
h, v = left + radius, top + radius
d.circle((h, v), radius - 1)
d.circle((h, v), radius)
if self.selected:
some = radius/3
d.paint((h-some, v-some), (h+some, v+some))
#
def textpos(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
h = left + size + d.textwidth(' ')
v = top + (size - d.lineheight()) / 2
return h, v
#
def fliphilite(self, d):
(left, top), (right, bottom) = self.bounds
size = bottom - top
d.invert((left, top), (left + size, bottom))
#
# NoReactivity ignores mouse and timer events.
# 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
# active_hook called on some mouse-move 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
# timer_hook called on timer events
......@@ -235,7 +217,7 @@ class RadioAppearance() = BaseAppearance():
class NoReactivity():
#
def init_reactivity(self):
self.down_hook = self.active_hook = self.up_hook = \
self.down_hook = self.move_hook = self.up_hook = \
self.on_hook = self.off_hook = self.timer_hook = \
self.hook = self.active = 0
#
......@@ -257,8 +239,8 @@ class NoReactivity():
def down_trigger(self):
if self.down_hook: self.down_hook(self)
#
def active_trigger(self):
if self.active_hook: self.active_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)
......@@ -290,7 +272,7 @@ class ToggleReactivity() = NoReactivity():
#
def mouse_move(self, detail):
if self.active:
self.active_trigger()
self.move_trigger()
#
def mouse_up(self, detail):
if self.active:
......@@ -325,7 +307,7 @@ class TriggerReactivity() = NoReactivity():
if self.active:
self.hilite(self.mousetest(detail[_HV]))
if self.hilited:
self.active_trigger()
self.move_trigger()
#
def mouse_up(self, detail):
if self.active:
......@@ -338,7 +320,7 @@ class TriggerReactivity() = NoReactivity():
#
def timer(self):
if self.active and self.hilited:
self.active_trigger()
self.timer_trigger()
#
......@@ -382,14 +364,27 @@ class Define():
#
def define(self, (win, bounds, text)):
self.init_appearance(win, bounds)
self.text = text
self.init_reactivity()
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 BaseButton() = NoReactivity(), BaseAppearance(), Define(): pass
class BaseButton() = NoReactivity(), LabelAppearance(), Define(): pass
class Label() = NoReactivity(), LabelAppearance(), Define(): pass
class ClassicButton() = TriggerReactivity(), ButtonAppearance(), Define(): pass
class CheckButton() = CheckReactivity(), CheckAppearance(), Define(): pass
......
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