source/frontend/patchcanvas/canvasfadeanimation.py

   1 #!/usr/bin/env python3
   2 # SPDX-FileCopyrightText: 2011-2024 Filipe Coelho <falktx@falktx.com>
   3 # SPDX-License-Identifier: GPL-2.0-or-later
   4
   5 # ------------------------------------------------------------------------------------------------------------
   6 # Imports (Global)
   7
   8 from qt_compat import qt_config
   9
  10 if qt_config == 5:
  11     from PyQt5.QtCore import QAbstractAnimation
  12     from PyQt5.QtWidgets import QGraphicsObject
  13 elif qt_config == 6:
  14     from PyQt6.QtCore import QAbstractAnimation
  15     from PyQt6.QtWidgets import QGraphicsObject
  16
  17 # ------------------------------------------------------------------------------------------------------------
  18 # Imports (Custom)
  19
  20 from . import canvas, CanvasBoxType
  21
  22 # ------------------------------------------------------------------------------------------------------------
  23
  24 class CanvasFadeAnimation(QAbstractAnimation):
  25     def __init__(self, item, show):
  26         QAbstractAnimation.__init__(self)
  27
  28         self.m_show = show
  29         self.m_duration = 0
  30         self.m_item = item
  31         self.m_item_is_object = isinstance(item, QGraphicsObject)
  32
  33     def item(self):
  34         return self.m_item
  35
  36     def forceStop(self):
  37         self.blockSignals(True)
  38         self.stop()
  39         self.blockSignals(False)
  40
  41     def setDuration(self, time):
  42         if self.m_item.opacity() == 0 and not self.m_show:
  43             self.m_duration = 0
  44         else:
  45             if self.m_item_is_object:
  46                 self.m_item.blockSignals(True)
  47                 self.m_item.show()
  48                 self.m_item.blockSignals(False)
  49             else:
  50                 self.m_item.show()
  51             self.m_duration = time
  52
  53     def duration(self):
  54         return self.m_duration
  55
  56     def updateCurrentTime(self, time):
  57         if self.m_duration == 0:
  58             return
  59
  60         if self.m_show:
  61             value = float(time) / self.m_duration
  62         else:
  63             value = 1.0 - (float(time) / self.m_duration)
  64
  65         try:
  66             self.m_item.setOpacity(value)
  67         except RuntimeError:
  68             print("CanvasFadeAnimation::updateCurrentTime() - failed to animate canvas item, already destroyed?")
  69             self.forceStop()
  70             canvas.animation_list.remove(self)
  71             return
  72
  73         if self.m_item.type() == CanvasBoxType:
  74             self.m_item.setShadowOpacity(value)
  75
  76     def updateDirection(self, direction):
  77         pass
  78
  79     def updateState(self, oldState, newState):
  80         pass
  81
  82 # ------------------------------------------------------------------------------------------------------------