探测窗口和放大截图

.settings/org.eclipse.core.resources.prefs

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README.md

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      - [1.28.3 pydext](C和C++扩展/pydext/)
  - [1.29 数据库查询显示表格](数据库查询显示表格/)
  - [1.30 左侧选项卡](左侧选项卡/)
+ - [1.40 探测窗口和放大截图](探测窗口和放大截图/)
 
 
 ### [2.QGraphicsView练习](QGraphicsView练习/)

探测窗口和放大截图/README.md

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+# 简单探测窗口和放大截图
+
+利用win32gui模块获取鼠标所在位置的窗口大小(未去掉边框)和rgb颜色, 主要思路是利用一个全屏的全透明鼠标穿透的窗口（目的在于绘制矩形框和截图）
+
+截图
+
+![1](ScreenShot/1.gif)

探测窗口和放大截图/简单探测窗口和放大截图.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from PyQt5.QtCore import Qt, QRect
+from PyQt5.QtGui import QPainter, QPen, QCursor, QColor
+from PyQt5.QtWidgets import QLabel, QWidget, QApplication
+import win32gui
+
+
+# Created on 2018年6月8日
+# author: Irony
+# site: https://github.com/892768447
+# email: 892768447@qq.com
+# file: 简单探测窗口和放大截图
+# description:
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = 'Copyright (c) 2018 Irony'
+__Version__ = 1.0
+
+
+class FrameWidget(QWidget):
+    # 一个全屏的透明窗口
+
+    def __init__(self, *args, **kwargs):
+        super(FrameWidget, self).__init__(*args, **kwargs)
+        self.setWindowFlags(Qt.Tool | Qt.FramelessWindowHint |
+                            Qt.WindowStaysOnTopHint)
+        self.setAttribute(Qt.WA_TranslucentBackground, True)
+        self.showFullScreen()  # 全屏
+        self._rect = QRect()  # 被探测的窗口的矩形位置
+
+    def setRect(self, x, y, w, h):
+        # 更新矩形框
+        self._rect.setX(x)
+        self._rect.setY(y)
+        self._rect.setWidth(w - x)
+        self._rect.setHeight(h - y)
+        self.update()
+
+    def paintEvent(self, event):
+        super(FrameWidget, self).paintEvent(event)
+        if self._rect.isValid():  # 画边框
+            painter = QPainter(self)
+            painter.setPen(QPen(Qt.red, 4))
+            painter.drawRect(self._rect)
+
+
+class Label(QLabel):
+
+    def __init__(self, *args, **kwargs):
+        super(Label, self).__init__(*args, **kwargs)
+        self.ismd = False  # 是不是否按下
+        self.setAlignment(Qt.AlignCenter)
+        self.setText('鼠标按住不放拖动到外面')
+        self.resize(240, 240)
+        self.frameWidget = FrameWidget()  # 边框
+
+    def closeEvent(self, event):
+        self.frameWidget.close()
+        super(Label, self).closeEvent(event)
+
+    def mousePressEvent(self, event):
+        super(Label, self).mousePressEvent(event)
+        self.ismd = True  # 按下
+        # 设置鼠标样式为十字
+        self.setCursor(Qt.CrossCursor)
+
+    def mouseReleaseEvent(self, event):
+        super(Label, self).mouseReleaseEvent(event)
+        self.ismd = False
+        self.frameWidget.setRect(0, 0, 0, 0)
+        # 设置鼠标样式为普通
+        self.setCursor(Qt.ArrowCursor)
+        self.clear()
+        self.setText('鼠标按住不放拖动到外面')
+
+    def mouseMoveEvent(self, event):
+        super(Label, self).mouseMoveEvent(event)
+        # 得到鼠标在屏幕中的位置
+        pos = self.mapToGlobal(event.pos())
+        hwnd = win32gui.WindowFromPoint((pos.x(), pos.y()))
+        self.frameWidget.setRect(*win32gui.GetWindowRect(hwnd))
+        # 截图
+        screen = QApplication.primaryScreen()
+        if screen is not None:
+            image = screen.grabWindow(0,
+                                      pos.x() - 60, pos.y() - 60, 120, 120)
+            if not image.isNull():
+                self.setPixmap(image.scaled(240, 240))
+
+    def paintEvent(self, event):
+        super(Label, self).paintEvent(event)
+        # 中正间画十字
+        painter = QPainter(self)
+        painter.setPen(Qt.red)
+        x = int(self.width() / 2)
+        y = int(self.height() / 2)
+        painter.drawLine(x, 0, x, self.height())
+        painter.drawLine(0, y, self.width(), y)
+        if self.ismd:
+            # 画坐标点
+            pos = QCursor.pos()
+            ret = win32gui.GetPixel(win32gui.GetWindowDC(
+                win32gui.GetDesktopWindow()), pos.x(), pos.y())
+            r, g, b = ret & 0xff, (ret >> 8) & 0xff, (ret >> 16) & 0xff
+            print(r, g, b)
+            painter.setPen(Qt.white)
+            painter.drawText(self.rect(), Qt.AlignLeft |
+                             Qt.AlignBottom, '({}, {})\nRGB: ({}, {}, {})\n{}'.format(
+                                 pos.x(), pos.y(), r, g, b, QColor(r, g, b).name()))
+
+
+if __name__ == '__main__':
+    import sys
+    app = QApplication(sys.argv)
+    app.setQuitOnLastWindowClosed(True)
+    w = Label()
+    w.show()
+    sys.exit(app.exec_())