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QGraphicsItem

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Irony 2018-07-26 14:28:16 +08:00
parent 116937cdb6
commit 39fe35e309
3 changed files with 165 additions and 0 deletions
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2
.settings/org.eclipse.core.resources.prefs
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@ -11,6 +11,8 @@ encoding//PyQtChart\u7EC3\u4E60/test/LineChart\u81EA\u5B9A\u4E49xy\u8F74.py=utf-
encoding//PyQtChart\u7EC3\u4E60/test/ToolTip.py=utf-8
encoding//PyQtChart\u7EC3\u4E60/test/ToolTip2.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/ImageView.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/QGraphicsItem/Item\u62D6\u62FD\u6539\u53D8\u5927\u5C0F.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/QGraphicsItem/Item\u79FB\u52A8.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/\u4E16\u754C\u5730\u56FE/WorldMap.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/\u6DFB\u52A0QWidget.py=utf-8
encoding//QGraphicsView\u7EC3\u4E60/\u7B80\u5355\u56FE\u50CF\u5904\u7406/SimpleImagePs.py=utf-8

100
QGraphicsView练习/QGraphicsItem/Item拖拽改变大小.py Normal file
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@ -0,0 +1,100 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2018年7月26日
@author: Irony
@site: https://github.com/892768447
@email: 892768447@qq.com
@file: QGraphicsView练习.QGraphicsItem.Item移动
@description:
"""
from PyQt5.QtCore import Qt, QLineF
from PyQt5.QtGui import QPainter, QColor, QPen
from PyQt5.QtWidgets import QGraphicsRectItem, QGraphicsView, QGraphicsScene,\
QStyle
__Author__ = """By: Irony
QQ: 892768447
Email: 892768447@qq.com"""
__Copyright__ = "Copyright (c) 2018 Irony"
__Version__ = "Version 1.0"
class MoveableItem(QGraphicsRectItem):
def __init__(self, *args, **kwargs):
super(MoveableItem, self).__init__(*args, **kwargs)
# 可移动,可选择,有焦点
self.setFlags(self.ItemIsMovable |
self.ItemIsSelectable | self.ItemIsFocusable)
# 设置接收悬停事件
self.setAcceptHoverEvents(True)
self.setBrush(QColor(247, 160, 57)) # 设置背景颜色
# 是否在调整大小的状态
self.isResizing = False
def paint(self, painter, option, widget):
super(MoveableItem, self).paint(painter, option, widget)
# 当鼠标选中后在边缘绘制边框
if option.state & QStyle.State_Selected:
rect = self.boundingRect()
painter.setRenderHint(QPainter.Antialiasing, True) # 抗锯齿
if option.state & QStyle.State_HasFocus: # 有焦点
painter.setPen(QPen(Qt.red, 2)) # 设置红色画笔
painter.drawLines( # 在左上、左下、右上、右下画8条小线段
QLineF(rect.x(), rect.y(), rect.x()+10, rect.y()), # 左上顶点向右
QLineF(rect.x(), rect.y(), rect.x(), rect.y()+10), # 左上顶点向下
QLineF(rect.x(), rect.y()+rect.height(), rect.x()+10, rect.y()+rect.height()), # 左下顶点向右
QLineF(rect.x(), rect.y()+rect.height(), rect.x(), rect.y()+rect.height() - 10), # 左下顶点向上
QLineF(rect.width(), rect.y(), rect.width() - 10, rect.y()), # 右上顶点向左
QLineF(rect.width(), rect.y(), rect.width(), rect.y()+10), # 右上顶点向下
QLineF(rect.width(), rect.height(),
rect.width() - 10, rect.height()), # 右下顶点向左
QLineF(rect.width(), rect.height(), rect.width(),
rect.height() - 10) # 右下顶点向上
)
def hoverMoveEvent(self, event):
super(MoveableItem, self).hoverMoveEvent(event)
class ImageWidget(QGraphicsView):
def __init__(self, *args, **kwargs):
super(ImageWidget, self).__init__(*args, **kwargs)
self.resize(800, 600)
# 设置背景颜色
self.setBackgroundBrush(QColor(31, 31, 47))
# 去掉滚动条
# self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# 设置变换中心为鼠标所在位置
self.setTransformationAnchor(self.AnchorUnderMouse)
# 不保证painter的状态
self.setOptimizationFlags(self.DontSavePainterState)
self.setViewportUpdateMode(self.SmartViewportUpdate)
self.setRenderHints(QPainter.Antialiasing |
QPainter.SmoothPixmapTransform)
# 场景
self._scene = QGraphicsScene(0, 0, self.width(), self.height())
self.setScene(self._scene)
self._scene.addItem(MoveableItem(100, 100, 200, 200))
if __name__ == '__main__':
import sys
import cgitb
sys.excepthook = cgitb.Hook(1, None, 5, sys.stderr, 'text')
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
w = ImageWidget()
w.show()
sys.exit(app.exec_())

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QGraphicsView练习/QGraphicsItem/Item移动.py Normal file
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@ -0,0 +1,63 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2018年7月26日
@author: Irony
@site: https://github.com/892768447
@email: 892768447@qq.com
@file: QGraphicsView练习.QGraphicsItem.Item移动
@description:
"""
from PyQt5.QtGui import QPainter, QColor
from PyQt5.QtWidgets import QGraphicsRectItem, QGraphicsView, QGraphicsScene
__Author__ = """By: Irony
QQ: 892768447
Email: 892768447@qq.com"""
__Copyright__ = "Copyright (c) 2018 Irony"
__Version__ = "Version 1.0"
class MoveableItem(QGraphicsRectItem):
def __init__(self, *args, **kwargs):
super(MoveableItem, self).__init__(*args, **kwargs)
self.setFlag(self.ItemIsMovable) # 设置为可以动
self.setBrush(QColor(247, 160, 57)) # 设置背景颜色
class ImageWidget(QGraphicsView):
def __init__(self, *args, **kwargs):
super(ImageWidget, self).__init__(*args, **kwargs)
self.resize(800, 600)
# 设置背景颜色
self.setBackgroundBrush(QColor(31, 31, 47))
# 去掉滚动条
# self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# 设置变换中心为鼠标所在位置
self.setTransformationAnchor(self.AnchorUnderMouse)
# 不保证painter的状态
self.setOptimizationFlags(self.DontSavePainterState)
self.setViewportUpdateMode(self.SmartViewportUpdate)
self.setRenderHints(QPainter.Antialiasing |
QPainter.SmoothPixmapTransform)
# 场景
self._scene = QGraphicsScene()
self.setScene(self._scene)
self.setSceneRect(0, 0, self.width(), self.height())
self._scene.addItem(MoveableItem(100, 100, 200, 200))
if __name__ == '__main__':
import sys
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
w = ImageWidget()
w.show()
sys.exit(app.exec_())