def size(self, dialog):
"""
Recalculate the size of the Scrollable.
@param dialog Dialog which contains us
"""
if dialog is None:
return
Widget.size(self, dialog)
if self.is_fixed_size:
self.width, self.height = self.max_width, self.max_height
self.hscrollbar_height = dialog.theme["hscrollbar"]["left"]["image"].height
self.vscrollbar_width = dialog.theme["vscrollbar"]["up"]["image"].width
if self.root_group is None: # do we need to re-clone dialog groups?
self.theme = dialog.theme
self.batch = dialog.batch
self.root_group = ScrollableGroup(0, 0, self.width, self.height, parent=dialog.fg_group)
self.panel_group = pyglet.graphics.OrderedGroup(0, self.root_group)
self.bg_group = pyglet.graphics.OrderedGroup(1, self.root_group)
self.fg_group = pyglet.graphics.OrderedGroup(2, self.root_group)
self.highlight_group = pyglet.graphics.OrderedGroup(3, self.root_group)
Wrapper.delete(self) # force children to abandon old groups
Wrapper.size(self, self) # all children are to use our groups
if self.always_show_scrollbars or (self.max_width and self.width > self.max_width):
if self.hscrollbar is None:
self.hscrollbar = HScrollbar(self.max_width)
else:
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.always_show_scrollbars or (self.max_height and self.height > self.max_height):
if self.vscrollbar is None:
self.vscrollbar = VScrollbar(self.max_height)
else:
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.width = min(self.max_width or self.width, self.width)
self.content_width = self.width
self.height = min(self.max_height or self.height, self.height)
self.content_height = self.height
if self.hscrollbar is not None:
self.hscrollbar.size(dialog)
self.hscrollbar.set(self.max_width, max(self.content.width, self.max_width))
self.height += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.size(dialog)
self.vscrollbar.set(self.max_height, max(self.content.height, self.max_height))
self.width += self.vscrollbar.width
class Scrollable(Wrapper):
"""
Wraps a layout or widget and limits it to a maximum, or fixed, size.
If the layout exceeds the viewable limits then it is truncated and
scrollbars will be displayed so the user can pan around.
"""
def __init__(self,
content=None,
width=None,
height=None,
is_fixed_size=False,
always_show_scrollbars=False):
"""
Creates a new Scrollable.
@param content The layout or Widget to be scrolled
@param width Maximum width, or None
@param height Maximum height, or None
@param is_fixed_size True if we should always be at maximum size;
otherwise we shrink to match our content
@param always_show_scrollbars True if we should always show scrollbars
"""
if is_fixed_size:
assert width is not None and height is not None
Wrapper.__init__(self, content)
self.max_width = width
self.max_height = height
self.is_fixed_size = is_fixed_size
self.always_show_scrollbars = always_show_scrollbars
self.hscrollbar = None
self.vscrollbar = None
self.content_width = 0
self.content_height = 0
self.content_x = 0
self.content_y = 0
self.hscrollbar_height = 0
self.vscrollbar_width = 0
# We emulate some aspects of Dialog here. We cannot just inherit
# from Dialog because pyglet event handling won't allow keyword
# arguments to be passed through.
self.theme = None
self.batch = None
self.root_group = None
self.panel_group = None
self.bg_group = None
self.fg_group = None
self.highlight_group = None
self.needs_layout = False
def _get_controls(self):
"""
We represent ourself as a Control to the Dialog, but we pass through
the events we receive from Dialog.
"""
base_controls = Wrapper._get_controls(self)
controls = []
our_left = self.content_x
our_right = our_left + self.content_width
our_bottom = self.content_y
our_top = our_bottom + self.content_height
for control, left, right, top, bottom in base_controls:
controls.append((control, max(left,
our_left), min(right, our_right),
min(top, our_top), max(bottom, our_bottom)))
if self.hscrollbar is not None:
controls += self.hscrollbar._get_controls()
if self.vscrollbar is not None:
controls += self.vscrollbar._get_controls()
return controls
def delete(self):
"""
Delete all graphical elements associated with the Scrollable
"""
Wrapper.delete(self)
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.root_group = None
self.panel_group = None
self.bg_group = None
self.fg_group = None
self.highlight_group = None
def ensure_visible(self, control):
"""
Make sure a control is visible.
"""
offset_x = 0
if self.hscrollbar:
offset_x = self.hscrollbar.get(self.content_width,
self.content.width)
offset_y = 0
if self.vscrollbar:
offset_y = self.content.height - self.content_height - \
self.vscrollbar.get(self.content_height,
self.content.height)
control_left = control.x - self.content_x - offset_x
control_right = control_left + control.width
control_bottom = control.y - self.content_y + offset_y
control_top = control_bottom + control.height
if self.hscrollbar is not None:
self.hscrollbar.ensure_visible(
control_left, control_right,
max(self.content_width, self.content.width))
if self.vscrollbar is not None:
self.vscrollbar.ensure_visible(
control_top, control_bottom,
max(self.content_height, self.content.height))
def expand(self, width, height):
if self.content.is_expandable():
if self.vscrollbar is not None:
self.content_width = width - self.vscrollbar_width
else:
self.content_width = width
if self.hscrollbar is not None:
self.content_height = height - self.hscrollbar_height
else:
self.content_height = height
self.content.expand(max(self.content_width, self.content.width),
max(self.content_height, self.content.height))
self.width, self.height = width, height
def get_root(self):
if self.saved_dialog:
return self.saved_dialog.get_root()
else:
return self
def hit_test(self, x, y):
"""
We only intercept events for the content region, not for
our scrollbars. They can handle themselves!
"""
return x >= self.content_x and y >= self.content_y and \
x < self.content_x + self.content_width and \
y < self.content_y + self.content_height
def is_expandable(self):
return True
def layout(self, x, y):
"""
Reposition the Scrollable
@param x X coordinate of lower left corner
@param y Y coordinate of lower left corner
"""
self.x, self.y = x, y
# Work out the adjusted content width and height
if self.hscrollbar is not None:
self.hscrollbar.layout(x, y)
y += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.layout(x + self.content_width, y)
# Set the scissor group
self.root_group.x, self.root_group.y = x - 1, y - 1
self.root_group.width = self.content_width + 1
self.root_group.height = self.content_height + 1
# Work out the content layout
self.content_x, self.content_y = x, y
left = x
top = y + self.content_height - self.content.height
if self.hscrollbar:
left -= self.hscrollbar.get(self.content_width, self.content.width)
if self.vscrollbar:
top += self.vscrollbar.get(self.content_height,
self.content.height)
self.content.layout(left, top)
self.needs_layout = False
def on_update(self, dt):
"""
On updates, we redo the layout if scrollbars have changed position
@param dt Time passed since last update event (in seconds)
"""
if self.needs_layout:
width, height = self.width, self.height
self.size(self.saved_dialog)
self.expand(width, height)
self.layout(self.x, self.y)
def set_needs_layout(self):
self.needs_layout = True
if self.saved_dialog is not None:
self.saved_dialog.set_needs_layout()
def set_wheel_hint(self, control):
if self.saved_dialog is not None:
self.saved_dialog.set_wheel_hint(control)
def set_wheel_target(self, control):
if self.saved_dialog is not None:
self.saved_dialog.set_wheel_target(control)
def size(self, dialog):
"""
Recalculate the size of the Scrollable.
@param dialog Dialog which contains us
"""
if dialog is None:
return
Widget.size(self, dialog)
if self.is_fixed_size:
self.width, self.height = self.max_width, self.max_height
self.hscrollbar_height = \
dialog.theme['hscrollbar']['left']['image'].height
self.vscrollbar_width = \
dialog.theme['vscrollbar']['up']['image'].width
if self.root_group is None: # do we need to re-clone dialog groups?
self.theme = dialog.theme
self.batch = dialog.batch
self.root_group = ScrollableGroup(0,
0,
self.width,
self.height,
parent=dialog.fg_group)
self.panel_group = pyglet.graphics.OrderedGroup(0, self.root_group)
self.bg_group = pyglet.graphics.OrderedGroup(1, self.root_group)
self.fg_group = pyglet.graphics.OrderedGroup(2, self.root_group)
self.highlight_group = pyglet.graphics.OrderedGroup(
3, self.root_group)
Wrapper.delete(self) # force children to abandon old groups
Wrapper.size(self, self) # all children are to use our groups
if self.always_show_scrollbars or \
(self.max_width and self.width > self.max_width):
if self.hscrollbar is None:
self.hscrollbar = HScrollbar(self.max_width)
else:
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.always_show_scrollbars or \
(self.max_height and self.height > self.max_height):
if self.vscrollbar is None:
self.vscrollbar = VScrollbar(self.max_height)
else:
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.width = min(self.max_width or self.width, self.width)
self.content_width = self.width
self.height = min(self.max_height or self.height, self.height)
self.content_height = self.height
if self.hscrollbar is not None:
self.hscrollbar.size(dialog)
self.hscrollbar.set(self.max_width,
max(self.content.width, self.max_width))
self.height += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.size(dialog)
self.vscrollbar.set(self.max_height,
max(self.content.height, self.max_height))
self.width += self.vscrollbar.width
def size(self, dialog):
"""
Recalculate the size of the Scrollable.
@param dialog Dialog which contains us
"""
if dialog is None:
return
Widget.size(self, dialog)
if self.is_fixed_size:
self.width, self.height = self.max_width, self.max_height
self.hscrollbar_height = \
dialog.theme['hscrollbar']['left']['image'].height
self.vscrollbar_width = \
dialog.theme['vscrollbar']['up']['image'].width
if self.root_group is None: # do we need to re-clone dialog groups?
self.theme = dialog.theme
self.batch = dialog.batch
self.root_group = ScrollableGroup(0,
0,
self.width,
self.height,
parent=dialog.fg_group)
self.panel_group = pyglet.graphics.OrderedGroup(0, self.root_group)
self.bg_group = pyglet.graphics.OrderedGroup(1, self.root_group)
self.fg_group = pyglet.graphics.OrderedGroup(2, self.root_group)
self.highlight_group = pyglet.graphics.OrderedGroup(
3, self.root_group)
Wrapper.delete(self) # force children to abandon old groups
Wrapper.size(self, self) # all children are to use our groups
if self.always_show_scrollbars or \
(self.max_width and self.width > self.max_width):
if self.hscrollbar is None:
self.hscrollbar = HScrollbar(self.max_width)
else:
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.always_show_scrollbars or \
(self.max_height and self.height > self.max_height):
if self.vscrollbar is None:
self.vscrollbar = VScrollbar(self.max_height)
else:
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.width = min(self.max_width or self.width, self.width)
self.content_width = self.width
self.height = min(self.max_height or self.height, self.height)
self.content_height = self.height
if self.hscrollbar is not None:
self.hscrollbar.size(dialog)
self.hscrollbar.set(self.max_width,
max(self.content.width, self.max_width))
self.height += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.size(dialog)
self.vscrollbar.set(self.max_height,
max(self.content.height, self.max_height))
self.width += self.vscrollbar.width
class Scrollable(Wrapper):
"""
Wraps a layout or widget and limits it to a maximum, or fixed, size.
If the layout exceeds the viewable limits then it is truncated and
scrollbars will be displayed so the user can pan around.
"""
def __init__(self, content=None, width=None, height=None, is_fixed_size=False, always_show_scrollbars=False):
"""
Creates a new Scrollable.
@param content The layout or Widget to be scrolled
@param width Maximum width, or None
@param height Maximum height, or None
@param is_fixed_size True if we should always be at maximum size;
otherwise we shrink to match our content
@param always_show_scrollbars True if we should always show scrollbars
"""
if is_fixed_size:
assert width is not None and height is not None
Wrapper.__init__(self, content)
self.max_width = width
self.max_height = height
self.is_fixed_size = is_fixed_size
self.always_show_scrollbars = always_show_scrollbars
self.hscrollbar = None
self.vscrollbar = None
self.content_width = 0
self.content_height = 0
self.content_x = 0
self.content_y = 0
self.hscrollbar_height = 0
self.vscrollbar_width = 0
# We emulate some aspects of Dialog here. We cannot just inherit
# from Dialog because pyglet event handling won't allow keyword
# arguments to be passed through.
self.theme = None
self.batch = None
self.root_group = None
self.panel_group = None
self.bg_group = None
self.fg_group = None
self.highlight_group = None
self.needs_layout = False
def _get_controls(self):
"""
We represent ourself as a Control to the Dialog, but we pass through
the events we receive from Dialog.
"""
base_controls = Wrapper._get_controls(self)
controls = []
our_left = self.content_x
our_right = our_left + self.content_width
our_bottom = self.content_y
our_top = our_bottom + self.content_height
for control, left, right, top, bottom in base_controls:
controls.append(
(control, max(left, our_left), min(right, our_right), min(top, our_top), max(bottom, our_bottom))
)
if self.hscrollbar is not None:
controls += self.hscrollbar._get_controls()
if self.vscrollbar is not None:
controls += self.vscrollbar._get_controls()
return controls
def delete(self):
"""
Delete all graphical elements associated with the Scrollable
"""
Wrapper.delete(self)
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.root_group = None
self.panel_group = None
self.bg_group = None
self.fg_group = None
self.highlight_group = None
def ensure_visible(self, control):
"""
Make sure a control is visible.
"""
offset_x = 0
if self.hscrollbar:
offset_x = self.hscrollbar.get(self.content_width, self.content.width)
offset_y = 0
if self.vscrollbar:
offset_y = (
self.content.height
- self.content_height
- self.vscrollbar.get(self.content_height, self.content.height)
)
control_left = control.x - self.content_x - offset_x
control_right = control_left + control.width
control_bottom = control.y - self.content_y + offset_y
control_top = control_bottom + control.height
if self.hscrollbar is not None:
self.hscrollbar.ensure_visible(control_left, control_right, max(self.content_width, self.content.width))
if self.vscrollbar is not None:
self.vscrollbar.ensure_visible(control_top, control_bottom, max(self.content_height, self.content.height))
def expand(self, width, height):
if self.content.is_expandable():
if self.vscrollbar is not None:
self.content_width = width - self.vscrollbar_width
else:
self.content_width = width
if self.hscrollbar is not None:
self.content_height = height - self.hscrollbar_height
else:
self.content_height = height
self.content.expand(
max(self.content_width, self.content.width), max(self.content_height, self.content.height)
)
self.width, self.height = width, height
def get_root(self):
if self.saved_dialog:
return self.saved_dialog.get_root()
else:
return self
def hit_test(self, x, y):
"""
We only intercept events for the content region, not for
our scrollbars. They can handle themselves!
"""
return (
x >= self.content_x
and y >= self.content_y
and x < self.content_x + self.content_width
and y < self.content_y + self.content_height
)
def is_expandable(self):
return True
def layout(self, x, y):
"""
Reposition the Scrollable
@param x X coordinate of lower left corner
@param y Y coordinate of lower left corner
"""
self.x, self.y = x, y
# Work out the adjusted content width and height
if self.hscrollbar is not None:
self.hscrollbar.layout(x, y)
y += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.layout(x + self.content_width, y)
# Set the scissor group
self.root_group.x, self.root_group.y = x - 1, y - 1
self.root_group.width = self.content_width + 1
self.root_group.height = self.content_height + 1
# Work out the content layout
self.content_x, self.content_y = x, y
left = x
top = y + self.content_height - self.content.height
if self.hscrollbar:
left -= self.hscrollbar.get(self.content_width, self.content.width)
if self.vscrollbar:
top += self.vscrollbar.get(self.content_height, self.content.height)
self.content.layout(left, top)
self.needs_layout = False
def on_update(self, dt):
"""
On updates, we redo the layout if scrollbars have changed position
@param dt Time passed since last update event (in seconds)
"""
if self.needs_layout:
width, height = self.width, self.height
self.size(self.saved_dialog)
self.expand(width, height)
self.layout(self.x, self.y)
def set_needs_layout(self):
self.needs_layout = True
if self.saved_dialog is not None:
self.saved_dialog.set_needs_layout()
def set_wheel_hint(self, control):
if self.saved_dialog is not None:
self.saved_dialog.set_wheel_hint(control)
def set_wheel_target(self, control):
if self.saved_dialog is not None:
self.saved_dialog.set_wheel_target(control)
def size(self, dialog):
"""
Recalculate the size of the Scrollable.
@param dialog Dialog which contains us
"""
if dialog is None:
return
Widget.size(self, dialog)
if self.is_fixed_size:
self.width, self.height = self.max_width, self.max_height
self.hscrollbar_height = dialog.theme["hscrollbar"]["left"]["image"].height
self.vscrollbar_width = dialog.theme["vscrollbar"]["up"]["image"].width
if self.root_group is None: # do we need to re-clone dialog groups?
self.theme = dialog.theme
self.batch = dialog.batch
self.root_group = ScrollableGroup(0, 0, self.width, self.height, parent=dialog.fg_group)
self.panel_group = pyglet.graphics.OrderedGroup(0, self.root_group)
self.bg_group = pyglet.graphics.OrderedGroup(1, self.root_group)
self.fg_group = pyglet.graphics.OrderedGroup(2, self.root_group)
self.highlight_group = pyglet.graphics.OrderedGroup(3, self.root_group)
Wrapper.delete(self) # force children to abandon old groups
Wrapper.size(self, self) # all children are to use our groups
if self.always_show_scrollbars or (self.max_width and self.width > self.max_width):
if self.hscrollbar is None:
self.hscrollbar = HScrollbar(self.max_width)
else:
if self.hscrollbar is not None:
self.hscrollbar.delete()
self.hscrollbar = None
if self.always_show_scrollbars or (self.max_height and self.height > self.max_height):
if self.vscrollbar is None:
self.vscrollbar = VScrollbar(self.max_height)
else:
if self.vscrollbar is not None:
self.vscrollbar.delete()
self.vscrollbar = None
self.width = min(self.max_width or self.width, self.width)
self.content_width = self.width
self.height = min(self.max_height or self.height, self.height)
self.content_height = self.height
if self.hscrollbar is not None:
self.hscrollbar.size(dialog)
self.hscrollbar.set(self.max_width, max(self.content.width, self.max_width))
self.height += self.hscrollbar.height
if self.vscrollbar is not None:
self.vscrollbar.size(dialog)
self.vscrollbar.set(self.max_height, max(self.content.height, self.max_height))
self.width += self.vscrollbar.width