73 lines
2.3 KiB
Python
73 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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This module contains the ZoomMode which lets you zoom in and out the editor.
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"""
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from pyqode.core.api.mode import Mode
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from pyqode.qt import QtCore
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class ZoomMode(Mode):
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""" Zooms/Unzooms the editor (Ctrl+mouse wheel or Ctrl + 0 to reset).
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This mode make it possible to zoom in/out the editor view.
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Here are the controls:
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* **zoom out**: *ctrl+-* or *ctrl+mouse wheel backward*
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* **zoom in**: *ctrl++* or *ctrl+mouse wheel forward*
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* **reset**: *ctrl + 0*
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"""
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def __init__(self):
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super(ZoomMode, self).__init__()
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self.prev_delta = 0
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self.default_font_size = 10
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def on_state_changed(self, state):
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if state:
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self.editor.mouse_wheel_activated.connect(
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self._on_wheel_event)
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self.editor.key_pressed.connect(self._on_key_pressed)
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else:
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self.editor.mouse_wheel_activated.disconnect(
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self._on_wheel_event)
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self.editor.key_pressed.disconnect(self._on_key_pressed)
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def _on_key_pressed(self, event):
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"""
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Resets editor font size to the default font size
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:param event: wheelEvent
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:type event: QKeyEvent
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"""
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if (int(event.modifiers()) & QtCore.Qt.ControlModifier > 0 and
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not int(event.modifiers()) & QtCore.Qt.ShiftModifier):
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if event.key() == QtCore.Qt.Key_0:
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self.editor.reset_zoom()
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event.accept()
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if event.key() == QtCore.Qt.Key_Plus:
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self.editor.zoom_in()
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event.accept()
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if event.key() == QtCore.Qt.Key_Minus:
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self.editor.zoom_out()
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event.accept()
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def _on_wheel_event(self, event):
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"""
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Increments or decrements editor fonts settings on mouse wheel event
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if ctrl modifier is on.
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:param event: wheel event
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:type event: QWheelEvent
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"""
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try:
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delta = event.angleDelta().y()
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except AttributeError:
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# PyQt4/PySide
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delta = event.delta()
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if int(event.modifiers()) & QtCore.Qt.ControlModifier > 0:
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if delta < self.prev_delta:
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self.editor.zoom_out()
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event.accept()
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else:
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self.editor.zoom_in()
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event.accept()
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