91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
# Python imports
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# Lib imports
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import gi
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gi.require_version('Gtk', '3.0')
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gi.require_version('Gdk', '3.0')
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from gi.repository import Gtk
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from gi.repository import Gdk
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# Application imports
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from ..widgets.image_view import ImageView
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class ImageViewEveBox(Gtk.EventBox):
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def __init__(self, vadjustment, hadjustment):
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super(ImageViewEveBox, self).__init__()
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self.vadjustment = vadjustment
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self.hadjustment = hadjustment
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self._is_dragging = False
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self._drag_start_x = 0
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self._drag_start_y = 0
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self._current_x = 0
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self._current_y = 0
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self._setup_styling()
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self._setup_signals()
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self._subscribe_to_events()
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self._load_widgets()
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self.show_all()
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def _setup_styling(self):
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...
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def _setup_signals(self):
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self.connect("button-press-event", self._press_event)
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self.connect("motion-notify-event", self._move_motion_event)
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self.connect("button-release-event", self._release_event)
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def _subscribe_to_events(self):
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...
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def _load_widgets(self):
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self.add(ImageView())
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def _press_event(self, widget = None, eve = None):
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window = settings.get_main_window()
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cursor = Gdk.Cursor(Gdk.CursorType.CROSSHAIR)
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window.get_window().set_cursor(cursor)
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self._is_dragging = True
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self._drag_start_x = eve.x_root
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self._drag_start_y = eve.y_root
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def _move_motion_event(self, widget = None, eve = None):
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if self._is_dragging:
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vval = self.vadjustment.get_value()
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hval = self.hadjustment.get_value()
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hstep_val = self.hadjustment.get_step_increment()
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vstep_val = self.vadjustment.get_step_increment()
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if eve.x_root > self._drag_start_x:
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self.hadjustment.set_value(hval + hstep_val)
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elif eve.x_root < self._drag_start_x:
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self.hadjustment.set_value(hval - hstep_val)
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else:
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self.hadjustment.set_value(hval)
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if eve.y_root > self._drag_start_y:
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self.vadjustment.set_value(vval + vstep_val)
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elif eve.y_root < self._drag_start_y:
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self.vadjustment.set_value(vval - vstep_val)
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else:
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self.vadjustment.set_value(vval)
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self._drag_start_x = eve.x_root
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self._drag_start_y = eve.y_root
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def _release_event(self, widget = None, eve = None):
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window = settings.get_main_window()
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watch_cursor = Gdk.Cursor(Gdk.CursorType.ARROW)
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window.get_window().set_cursor(watch_cursor)
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self._is_dragging = False
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self._drag_start_x = 0
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self._drag_start_y = 0
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