90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
#
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# Python GUI - Scrollable Views - Gtk
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#
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from gi.repository import Gtk
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from GUI.Scrollables import Scrollable, gtk_scrollbar_breadth
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from GUI.GScrollableViews import ScrollableView as GScrollableView, \
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default_extent, default_line_scroll_amount
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from GUI.Geometry import offset_rect_neg
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class ScrollableView(GScrollableView, Scrollable):
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def __init__(self, extent = default_extent,
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line_scroll_amount = default_line_scroll_amount,
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**kwds):
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gtk_scrolled_window = Gtk.ScrolledWindow()
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gtk_scrolled_window.show()
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GScrollableView.__init__(self, _gtk_outer = gtk_scrolled_window,
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extent = extent, line_scroll_amount = line_scroll_amount, **kwds)
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#
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# Properties
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#
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def get_content_width(self):
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w = self._size[0]
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if self.hscrolling:
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w -= gtk_scrollbar_breadth
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return w
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def get_content_height(self):
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h = self._size[1]
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if self.vscrolling:
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h -= gtk_scrollbar_breadth
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return h
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def get_content_size(self):
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return self.content_width, self.content_height
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def set_content_size(self, size):
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w, h = size
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d = gtk_scrollbar_breadth
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if self.hscrolling:
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w += d
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if self.vscrolling:
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h += d
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self.size = (w, h)
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def get_extent(self):
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return self._gtk_inner_widget.get_size()
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def set_extent(self, (w, h)):
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self._gtk_inner_widget.set_size(w, h)
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def get_scroll_offset(self):
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hadj, vadj = self._gtk_adjustments()
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return int(hadj.get_value()), int(vadj.get_value())
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def set_scroll_offset(self, (x, y)):
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hadj, vadj = self._gtk_adjustments()
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hadj.set_value(min(float(x), hadj.get_upper() - hadj.get_page_size()))
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vadj.set_value(min(float(y), vadj.get_upper() - vadj.get_page_size()))
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def get_line_scroll_amount(self):
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hadj, vadj = self._gtk_adjustments()
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return hadj.get_step_increment(), vadj.get_step_increment()
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def set_line_scroll_amount(self, (dx, dy)):
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hadj, vadj = self._gtk_adjustments()
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hadj.set_step_increment(float(dx)) # Amazingly, ints are not
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vadj.set_step_increment(float(dy)) # acceptable here.
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def invalidate_rect(self, rect):
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GScrollableView.invalidate_rect(self,
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offset_rect_neg(rect, self.scroll_offset))
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#
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# Internal
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#
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def _gtk_adjustments(self):
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gtk_widget = self._gtk_inner_widget
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hadj = gtk_widget.get_hadjustment()
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vadj = gtk_widget.get_vadjustment()
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return hadj, vadj
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def _gtk_prepare_cairo_context(self, context):
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x, y = self.scroll_offset
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context.translate(-x, -y)
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