#!python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2016/11/28 04:40:38 +0900>
u"""
QCursorのテスト。マウスカーソルを変更する.

動作確認環境 : Windows10 x64 + Python 2.7.12 + PySide 1.2.4
"""

import sys
from PySide.QtCore import *  # NOQA
from PySide.QtGui import *   # NOQA


class GView(QGraphicsView):

    """GraphicsView."""

    def __init__(self, *argv, **keywords):
        """init."""
        super(GView, self).__init__(*argv, **keywords)

        scene = QGraphicsScene(self)
        self.setScene(scene)

        pm = QPixmap(320, 240)
        pm.fill(QColor(192, 192, 192, 255))
        pitem = QGraphicsPixmapItem(pm)
        scene.addItem(pitem)

        lst = [
            ("pen", "./mouse_cursor_pen.png", 0, 0),
            ("eraser", "./mouse_cursor_eraser.png", 0, 0),
            ("picker", "./mouse_cursor_picker.png", 9, 22),
            ("fill", "./mouse_cursor_fill.png", 9, 22),
        ]
        self.curs = []
        for d in lst:
            name, filepath, hx, hy = d
            cur_pm = QPixmap(filepath)
            cur = QCursor(cur_pm, hotX=hx, hotY=hy)
            self.curs.append(cur)

        self.cur_idx = 0
        self.setCursor(self.curs[self.cur_idx])

    def mousePressEvent(self, event):
        u"""マウスボタンが押された時の処理."""
        # 左もしくは右ボタンを押したらマウスカーソルを変更
        if event.button() == Qt.LeftButton:
            self.cur_idx = (self.cur_idx + 1) % len(self.curs)
        elif event.button() == Qt.RightButton:
            self.cur_idx = (self.cur_idx - 1 + len(self.curs)) % len(self.curs)
        else:
            return

        self.setCursor(self.curs[self.cur_idx])  # マウスカーソルを設定

    def mouseReleaseEvent(self, event):
        u"""マウスボタンが離された時の処理."""
        pass
        # self.unsetCursor()


class MyWidget(QWidget):

    """Main Window."""

    def __init__(self, *argv, **keywords):
        """init."""
        super(MyWidget, self).__init__(*argv, **keywords)
        l = QVBoxLayout()
        l.addWidget(QLabel("Dummy", self))
        l.addWidget(QLabel("Dummy", self))
        l.addWidget(GView(self))
        l.addWidget(QLabel("Dummy", self))
        l.addWidget(QLabel("Dummy", self))
        self.setLayout(l)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MyWidget()
    w.show()
    sys.exit(app.exec_())