Created
January 16, 2018 13:38
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マウスジェスチャーでUIにインプットするサンプル
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# -*- coding: utf-8 -*- | |
import math | |
import imp | |
try: | |
imp.find_module('PySide2') | |
from PySide2.QtWidgets import * | |
from PySide2.QtGui import * | |
from PySide2.QtCore import * | |
except ImportError: | |
from PySide.QtGui import * | |
from PySide.QtCore import * | |
from maya.app.general.mayaMixin import MayaQWidgetBaseMixin | |
class MainWindow(MayaQWidgetBaseMixin, QMainWindow): | |
number = 0#表示初期値 | |
mouse_flag = False#マウスが押されているかどうか | |
threshold = 4#マウスの座標を取得する間隔 | |
limit_angle = 120#マウスが反転したと判定する角度 | |
def __init__(self, parent = None): | |
super(MainWindow, self).__init__(parent) | |
wrapper = QWidget() | |
self.setCentralWidget(wrapper) | |
layout = QVBoxLayout() | |
wrapper.setLayout(layout) | |
#入力確認用UI | |
self.lcd = QLCDNumber() | |
layout.addWidget(self.lcd) | |
self.lcd.display(self.number) | |
self.lcd.installEventFilter(self) | |
self.show() | |
def eventFilter(self, obj, event): | |
if event.type() == QEvent.MouseButtonPress: | |
self.first_move_flag = True | |
self.pre_pos = map(float, [QCursor.pos().x(), QCursor.pos().y()*-1]) | |
self.pre_vec = [0, 1] | |
self.count = 0 | |
self.mouse_flag = True | |
return True | |
if event.type() == QEvent.MouseButtonRelease: | |
self.mouse_flag = False | |
return True | |
if self.mouse_flag: | |
if event.type() == QEvent.MouseMove: | |
mod = event.modifiers() | |
#print 'ev mod', mod | |
if mod == Qt.ControlModifier: | |
key_mod = 'ctrl'#100刻み | |
elif mod == Qt.ShiftModifier: | |
key_mod = 'shift'#10きざみ | |
else: | |
key_mod = None | |
delta = self.mouse_vector() | |
if delta is not None: | |
if key_mod == 'ctrl': | |
delta *= 100 | |
if key_mod == 'shift': | |
delta *= 10 | |
self.number += delta | |
self.lcd.display(self.number) | |
return True | |
return False | |
#マウスの座標計算してぐるぐる入力 | |
def mouse_vector(self): | |
#一定間隔ごとに計算 | |
if self.count <= self.threshold: | |
self.count += 1 | |
return None | |
else: | |
self.count = 0 | |
self.cur_pos = map(float, [QCursor.pos().x(), QCursor.pos().y()*-1]) | |
if self.cur_pos != self.pre_pos: | |
#現在のベクトルを求める | |
self.cur_vec = [self.cur_pos[0]-self.pre_pos[0], self.cur_pos[1]-self.pre_pos[1]] | |
#動き出しの符号を決定する | |
if self.first_move_flag: | |
self.operator = self.get_first_operator(self.cur_vec) | |
self.first_move_flag = False | |
#正規化して内積をとる | |
self.angle = self.culc_angle(self.cur_vec, self.pre_vec) | |
if self.angle >= self.limit_angle: | |
self.operator *= -1 | |
self.pre_pos = self.cur_pos | |
self.pre_vec = self.cur_vec | |
return self.operator | |
return None | |
#符号反転を左右で一意に決める | |
def get_first_operator(self, a): | |
value = a[0] | |
if value > 0: | |
return 1.0 | |
else: | |
return -1.0 | |
#2つのベクトルの角度を算出 | |
def culc_angle(self, a, b): | |
dot = self.dot_poduct(a, b, norm=True) | |
try: | |
rad = math.acos(dot) | |
except Exception as e:#逆コサインエラーの対処 | |
print e.message | |
print 'Arc cos error : dot ', dot | |
dot = round(dot, 0) | |
rad = math.acos(dot) | |
angle = rad*180/math.pi#ラジアンを弧度法に変換 | |
return angle | |
#内積とる | |
def dot_poduct(self, a, b, norm=False): | |
if norm:#正規化オプション | |
a = self.normalize(a) | |
b = self.normalize(b) | |
dot = (a[0]*b[0])+(a[1]*b[1]) | |
return dot | |
#ベクトルを正規化して戻す | |
def normalize(self, a): | |
length = self.get_length(a) | |
return [a[0]/length, a[1]/length] | |
#長さを出す | |
def get_length(self, a): | |
return math.sqrt(a[0]**2+a[1]**2) | |
MainWindow() |
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