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1 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg 2 # 3 # This file is part of Timeline. 4 # 5 # Timeline is free software: you can redistribute it and/or modify 6 # it under the terms of the GNU General Public License as published by 7 # the Free Software Foundation, either version 3 of the License, or 8 # (at your option) any later version. 9 # 10 # Timeline is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU General Public License for more details. 14 # 15 # You should have received a copy of the GNU General Public License 16 # along with Timeline. If not, see <http://www.gnu.org/licenses/>. 17 18 19 import time 20 21 from timelinelib.wxgui.components.maincanvas.inputhandler import InputHandler 22 232510427 InputHandler.__init__(self, timeline_canvas) 28 self._state = state 29 self.start_slider_pos = self.timeline_canvas.GetDividerPosition() 30 self.start_mouse_pos = y 31 self.last_mouse_pos = y 32 self.view_height = self.timeline_canvas.GetSize()[1] 33 self.start_time = start_time 34 self.last_clock_time = time.clock() 35 self.last_x = 0 36 self.last_x_distance = 0 37 self.last_y = 0 38 self.last_y_distance = 0 39 self.speed_px_per_sec = 0 40 self.INERTIAL_SCROLLING_SPEED_THRESHOLD = 2004143 self.last_mouse_pos = cursor.y 44 self._calculate_sped(cursor.x) 45 self._scroll_timeline(cursor.x) 46 percentage_distance = 100 * (cursor.y - self.start_mouse_pos) / self.view_height 47 self.timeline_canvas.SetDividerPosition(self.start_slider_pos + percentage_distance)4850 if self.start_mouse_pos == self.last_mouse_pos: 51 self.timeline_canvas.ClearSelectedEvents() 52 self._state.change_to_no_op() 53 self._state.edit_ends() 54 if self.timeline_canvas.GetAppearance().get_use_inertial_scrolling(): 55 if self.speed_px_per_sec > self.INERTIAL_SCROLLING_SPEED_THRESHOLD: 56 self._inertial_scrolling()5759 MAX_SPEED = 10000 60 self.last_x_distance = x - self.last_x 61 self.last_x = x 62 current_clock_time = time.clock() 63 elapsed_clock_time = current_clock_time - self.last_clock_time 64 if elapsed_clock_time == 0: 65 self.speed_px_per_sec = MAX_SPEED 66 else: 67 self.speed_px_per_sec = min(MAX_SPEED, abs(self.last_x_distance / 68 elapsed_clock_time)) 69 self.last_clock_time = current_clock_time7072 self.current_time = self.timeline_canvas.GetTimeAt(x) 73 self.timeline_canvas.Navigate(lambda tp: 74 tp.move_delta(self.start_time - self.current_time))7577 frame_time = self._calculate_frame_time() 78 value_factor = self._calculate_scroll_factor() 79 inertial_func = (0.20, 0.15, 0.10, 0.10, 0.10, 0.08, 0.06, 0.06, 0.05) 80 self.timeline_canvas.UseFastDraw(True) 81 next_frame_time = time.clock() 82 for value in inertial_func: 83 self.timeline_canvas.Scroll(value * value_factor * 0.1) 84 next_frame_time += frame_time 85 sleep_time = next_frame_time - time.clock() 86 if sleep_time >= 0: 87 time.sleep(sleep_time) 88 self.timeline_canvas.UseFastDraw(False)8991 MAX_FRAME_RATE = 26.0 92 frames_per_second = (MAX_FRAME_RATE * self.speed_px_per_sec / 93 (100 + self.speed_px_per_sec)) 94 frame_time = 1.0 / frames_per_second 95 return frame_time9698 if self.current_time > self.start_time: 99 direction = 1 100 else: 101 direction = -1 102 scroll_factor = (direction * self.speed_px_per_sec / self.INERTIAL_SCROLLING_SPEED_THRESHOLD) 103 return scroll_factor
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