PyQt5 屏幕截图
2019-09-17 python 1960
from PyQt5.QtWidgets import QApplication,QWidget
from PyQt5.QtCore import Qt,QPoint,QDateTime,QRectF,QRect
from PyQt5.QtGui import QPainter,QPalette,QPixmap,QColor,QBrush,QFont
import sys
def toRectF(rect):
return QRectF(
rect.x(),
rect.y(),
rect.width(),
rect.height()
)
def toRect(rectF):
return QRect(
rectF.x(),
rectF.y(),
rectF.width(),
rectF.height()
)
def normalizeRect(rect):
x = rect.x()
y = rect.y()
w = rect.width()
h = rect.height()
if w < 0:
x = x + w
w = -w
if h < 0:
y = y + h
h = -h
return QRectF(x, y, w, h)
class WScreenshot(QWidget):
u"""
截图
"""
def __init__(self, parent=None):
super(self.__class__, self).__init__(parent)
self.saveDir = u'D:/'
self.saveName = u'W截图-{}'.format(QDateTime().currentDateTime().toString("yyyyMMdd-hh-mm-ss"))
self.saveFormat = 'JPG'
self.picQuality = 100
self.setWindowTitle(u'截图窗体')
self.showFullScreen() # 全屏显示
self.setWindowFlags(Qt.WindowStaysOnTopHint | Qt.FramelessWindowHint)
# 屏幕 和 屏幕信息
self.screen = QApplication.primaryScreen().grabWindow(QApplication.desktop().winId())
self.screenSize = self.screen.rect().size()
self.screenRect = toRectF(self.screen.rect())
# -点
self.screenTopLeft = self.screenRect.topLeft()
self.screenBottomLeft = self.screenRect.bottomLeft()
self.screenTopRight = self.screenRect.topRight()
self.screenBottomRight = self.screenRect.bottomRight()
# -上下左右限
self.screenLeft = self.screenRect.left()
self.screenRight = self.screenRect.right()
self.screenTop = self.screenRect.top()
self.screenBottom = self.screenRect.bottom()
# A:start(x,y) D:(x+w,y)
# -----------------
# | |
# | |
# -----------------
# B:(x,y+h) C:end(x+w,y+h)
# 设置 self.screen 为窗口背景
palette = QPalette()
palette.setBrush(QPalette.Background, QBrush(self.screen))
self.setPalette(palette)
# 调节器层
self.adjustment_original = QPixmap(self.screenSize) # 初始调节器
self.adjustment_original.fill(QColor(0, 0, 0, 64))
self.adjustment = QPixmap() # 调节器
# self.adjustment = self.adjustment_original.copy() # 调节器
# 画布层
self.canvas_original = QPixmap(self.screenSize) # 初始画布
self.canvas_original.fill(Qt.transparent)
self.canvas_saved = self.canvas_original.copy() # 保存已经画好的图案
self.canvas = QPixmap() # 画布
# self.canvas = self.canvas_original.copy() # 画布
# self.canvas_saved = self.canvas.copy()
# 输出
self.output = QPixmap()
# 当前功能状态
self.isMasking = False
self.hasMask = False
self.isMoving = False
self.isAdjusting = False
self.isDrawing = False
self.hasPattern = False
self.mousePos = ''
self.isShifting = False
# 蒙版 和 蒙版信息
self.maskRect = QRectF()
self.maskRect_backup = QRectF()
# 以下 16 个变量随self.maskRect变化而变化
self.maskTopLeft = QPoint()
self.maskBottomLeft = QPoint()
self.maskTopRight = QPoint()
self.maskBottomRight = QPoint()
self.maskTopMid = QPoint()
self.maskBottomMid = QPoint()
self.maskLeftMid = QPoint()
self.maskRightMid = QPoint()
self.rectTopLeft = QRectF()
self.rectBottomLeft = QRectF()
self.rectTopRight = QRectF()
self.rectBottomRight = QRectF()
self.rectTop = QRectF()
self.rectBottom = QRectF()
self.rectLeft = QRectF()
self.rectRight = QRectF()
self.adjustmentLineWidth = 2
self.adjustmentWhiteDotRadius = 6
self.adjustmentBlueDotRadius = 4
self.blue = QColor(30, 120, 255)
self.setCursor(Qt.CrossCursor) # 设置鼠标样式 十字
self.setMouseTracking(True)
# 鼠标事件点
self.start = QPoint()
self.end = QPoint()
# self.test()
def test(self):
self.hasMask = True
self.isMasking = True
self.maskRect = QRectF(100, 100, 600, 800)
self.updateMaskInfo()
self.update()
def toMask(self):
rect = QRectF(self.start, self.end)
if self.isShifting:
x = rect.x()
y = rect.y()
w = rect.width()
h = rect.height()
absW = abs(w)
absH = abs(h)
wIsLonger = True if absW > absH else False
if w > 0:
if h > 0:
end = QPoint(x + absW, y + absW) if wIsLonger else QPoint(x + absH, y + absH)
else:
end = QPoint(x + absW, y - absW) if wIsLonger else QPoint(x + absH, y - absH)
else:
if h > 0:
end = QPoint(x - absW, y + absW) if wIsLonger else QPoint(x - absH, y + absH)
else:
end = QPoint(x - absW, y - absW) if wIsLonger else QPoint(x - absH, y - absH)
rect = QRectF(self.start, end)
self.maskRect = QRectF(
rect.x() + min(rect.width(), 0),
rect.y() + min(rect.height(), 0),
abs(rect.width()),
abs(rect.height())
)
# 修正超出屏幕、碰撞
if self.isShifting:
self.fixCollision()
self.updateMaskInfo()
self.update()
# 修复碰撞。针对 isShifting 的情况
def fixCollision(self):
vector = self.end - self.start
vX = vector.x()
vY = vector.y()
resStart = self.maskRect.topLeft()
resEnd = self.maskRect.bottomRight()
mLeft = self.maskRect.left()
mRight = self.maskRect.right()
mTop = self.maskRect.top()
mBottom = self.maskRect.bottom()
# w < h
if self.maskRect.left() <= self.screenLeft:
newW = mRight - self.screenLeft
if vY > 0:
resStart = QPoint(self.screenLeft, mTop)
resEnd = resStart + QPoint(newW, newW)
else:
resStart = resEnd + QPoint(-newW, -newW)
elif self.maskRect.right() >= self.screenRight:
newW = self.screenRight - mLeft
if vY > 0:
resEnd = resStart + QPoint(newW, newW)
else:
resEnd = QPoint(self.screenRight, mBottom)
resStart = resEnd + QPoint(-newW, -newW)
# w > h
elif self.maskRect.top() <= self.screenTop:
newW = mBottom - self.screenTop
if vX > 0:
resStart = QPoint(mLeft, self.screenTop)
resEnd = resStart + QPoint(newW, newW)
else:
resStart = resEnd + QPoint(-newW, -newW)
elif self.maskRect.bottom() >= self.screenBottom:
newW = self.screenBottom - mTop
if vX > 0:
resEnd = resStart + QPoint(newW, newW)
else:
resEnd = QPoint(mRight, self.screenBottom)
resStart = resEnd + QPoint(-newW, -newW)
self.maskRect = QRectF(resStart, resEnd)
def toAdjust(self):
mRect = self.maskRect_backup
mStart = mRect.topLeft()
mStartX = mStart.x()
mStartY = mStart.y()
mEnd = mRect.bottomRight()
mEndX = mEnd.x()
mEndY = mEnd.y()
resStart = mStart
resEnd = mEnd
if not self.isShifting:
if self.mousePos == 'TL':
resStart = self.end
elif self.mousePos == 'BL':
resStart = QPoint(self.end.x(), mStartY)
resEnd = QPoint(mEndX, self.end.y())
elif self.mousePos == 'TR':
resStart = QPoint(mStartX, self.end.y())
resEnd = QPoint(self.end.x(), mEndY)
elif self.mousePos == 'BR':
resEnd = self.end
elif self.mousePos == 'T':
resStart = QPoint(mStartX, self.end.y())
elif self.mousePos == 'B':
resEnd = QPoint(mEndX, self.end.y())
elif self.mousePos == 'L':
resStart = QPoint(self.end.x(), mStartY)
elif self.mousePos == 'R':
resEnd = QPoint(self.end.x(), mEndY)
else:
print(self.mousePos)
if self.mousePos == 'T':
resStart = QPoint(mStartX, self.end.y())
newW = mEndY - self.end.y()
resEnd = resStart + QPoint(newW, newW)
elif self.mousePos == 'B':
newW = self.end.y() - mStartY
resEnd = resStart + QPoint(newW, newW)
elif self.mousePos == 'L':
resStart = QPoint(self.end.x(), mStartY)
newW = mEndX - self.end.x()
resEnd = resStart + QPoint(newW, newW)
elif self.mousePos == 'R':
newW = self.end.x() - mStartX
resEnd = resStart + QPoint(newW, newW)
elif self.mousePos == 'TL':
newW = mEndX - self.end.x()
newH = mEndY - self.end.y()
newW = newW if newW > newH else newH
resStart = resEnd + QPoint(-newW, -newW)
elif self.mousePos == 'BR':
newW = self.end.x() - mStartX
newH = self.end.y() - mStartY
newW = newW if newW > newH else newH
resEnd = resStart + QPoint(newW, newW)
elif self.mousePos == 'TR':
newW = self.end.x() - mStartX
newH = mEndY - self.end.y()
newW = newW if newW > newH else newH
resStart = mRect.bottomLeft()
resEnd = resStart + QPoint(newW, -newW)
elif self.mousePos == 'BL':
newW = mEndX - self.end.x()
newH = self.end.y() - mStartY
newW = newW if newW > newH else newH
resStart = mRect.topRight()
resEnd = resStart + QPoint(-newW, newW)
self.maskRect = normalizeRect(QRectF(resStart, resEnd))
self.fixCollision()
self.updateMaskInfo()
self.update()
def toMove(self):
mStart = self.maskRect_backup.topLeft()
mStartX = mStart.x()
mStartY = mStart.y()
mEnd = self.maskRect_backup.bottomRight()
mEndX = mEnd.x()
mEndY = mEnd.y()
mWidth = self.maskRect_backup.width()
mHeight = self.maskRect_backup.height()
mWHPoint = QPoint(mWidth, mHeight)
vector = self.end - self.start
vX = vector.x()
vY = vector.y()
resStart = mStart + vector
resStartX = resStart.x()
resStartY = resStart.y()
resEnd = mEnd + vector
resEndX = resEnd.x()
resEndY = resEnd.y()
if resStartX <= self.screenLeft and resStartY <= self.screenTop:
resStart = self.screenTopLeft
resEnd = resStart + mWHPoint
elif resEndX >= self.screenRight and resEndY >= self.screenBottom:
resEnd = self.screenBottomRight
resStart = resEnd - mWHPoint
elif resStartX <= self.screenLeft and resEndY >= self.screenBottom:
resStart = QPoint(self.screenLeft, self.screenBottom - mHeight)
resEnd = resStart + mWHPoint
elif resEndX >= self.screenRight and resStartY <= self.screenTop:
resStart = QPoint(self.screenRight - mWidth, self.screenTop)
resEnd = resStart + mWHPoint
elif resStartX <= self.screenLeft:
resStart = QPoint(self.screenLeft, mStartY + vY)
resEnd = resStart + mWHPoint
elif resStartY <= self.screenTop:
resStart = QPoint(mStartX + vX, self.screenTop)
resEnd = resStart + mWHPoint
elif resEndX >= self.screenRight:
resEnd = QPoint(self.screenRight, mEndY + vY)
resStart = resEnd - mWHPoint
elif resEndY >= self.screenBottom:
resEnd = QPoint(mEndX + vX, self.screenBottom)
resStart = resEnd - mWHPoint
self.maskRect = normalizeRect(QRectF(resStart, resEnd))
self.updateMaskInfo()
self.update()
def mousePressEvent(self, QMouseEvent):
if QMouseEvent.button() == Qt.LeftButton:
self.start = QMouseEvent.pos()
self.end = self.start
if self.hasMask:
self.maskRect_backup = self.maskRect
if self.mousePos == 'mask':
self.isMoving = True
else:
self.isAdjusting = True
else:
self.isMasking = True
if QMouseEvent.button() == Qt.RightButton:
if self.isMasking or self.hasMask:
self.isMasking = False
self.hasMask = False
self.maskRect = QRectF(0, 0, 0, 0)
self.updateMaskInfo()
self.update()
else:
self.close()
def mouseReleaseEvent(self, QMouseEvent):
if QMouseEvent.button() == Qt.LeftButton:
self.isMasking = False
self.isMoving = False
self.isAdjusting = False
self.isDrawing = False
def mouseDoubleClickEvent(self, QMouseEvent):
if QMouseEvent.button() == Qt.LeftButton:
if self.mousePos == 'mask':
self.save()
self.close()
def mouseMoveEvent(self, QMouseEvent):
pos = QMouseEvent.pos()
self.end = pos
if self.isMasking:
self.hasMask = True
self.toMask()
elif self.isMoving:
self.toMove()
elif self.isAdjusting:
self.toAdjust()
# 设置鼠标样式
if self.isDrawing:
pass
else:
if self.hasMask:
if self.isMoving:
self.setCursor(Qt.SizeAllCursor)
if self.isAdjusting:
pass
else:
self.setMouseShape(pos)
else:
self.mousePos = ''
self.setCursor(Qt.CrossCursor) # 设置鼠标样式 十字
def setMouseShape(self, pos):
# 设置鼠标样式
if self.rectTopLeft.contains(pos):
self.setCursor(Qt.SizeFDiagCursor)
self.mousePos = 'TL'
elif self.rectBottomLeft.contains(pos):
self.setCursor(Qt.SizeBDiagCursor)
self.mousePos = 'BL'
elif self.rectBottomRight.contains(pos):
self.setCursor(Qt.SizeFDiagCursor)
self.mousePos = 'BR'
elif self.rectTopRight.contains(pos):
self.setCursor(Qt.SizeBDiagCursor)
self.mousePos = 'TR'
elif self.rectLeft.contains(pos):
self.setCursor(Qt.SizeHorCursor)
self.mousePos = 'L'
elif self.rectTop.contains(pos):
self.setCursor(Qt.SizeVerCursor)
self.mousePos = 'T'
elif self.rectBottom.contains(pos):
self.setCursor(Qt.SizeVerCursor)
self.mousePos = 'B'
elif self.rectRight.contains(pos):
self.setCursor(Qt.SizeHorCursor)
self.mousePos = 'R'
elif self.maskRect.contains(pos):
self.setCursor(Qt.SizeAllCursor)
self.mousePos = 'mask'
def updateMaskInfo(self):
# 蒙版点
self.maskTopLeft = self.maskRect.topLeft()
self.maskBottomLeft = self.maskRect.bottomLeft()
self.maskTopRight = self.maskRect.topRight()
self.maskBottomRight = self.maskRect.bottomRight()
self.maskTopMid = (self.maskTopLeft + self.maskTopRight) / 2
self.maskBottomMid = (self.maskBottomLeft + self.maskBottomRight) / 2
self.maskLeftMid = (self.maskTopLeft + self.maskBottomLeft) / 2
self.maskRightMid = (self.maskTopRight + self.maskBottomRight) / 2
# 除蒙版区外的 8 个区域
self.rectTopLeft = QRectF(self.screenTopLeft, self.maskTopLeft)
self.rectBottomLeft = QRectF(self.screenBottomLeft, self.maskBottomLeft)
self.rectTopRight = QRectF(self.screenTopRight, self.maskTopRight)
self.rectBottomRight = QRectF(self.screenBottomRight, self.maskBottomRight)
self.rectTop = QRectF(QPoint(self.maskRect.left(), self.screenTop), self.maskTopRight)
self.rectBottom = QRectF(self.maskBottomLeft, QPoint(self.maskRect.right(), self.screenBottom))
self.rectLeft = QRectF(QPoint(self.screenLeft, self.maskRect.top()), self.maskBottomLeft)
self.rectRight = QRectF(self.maskTopRight, QPoint(self.screenRight, self.maskRect.bottom()))
def paintEvent(self, QPaintEvent):
painter = QPainter()
# 开始在 画布层 上绘画。如果正在绘画，绘制图案, 否则不绘制
if self.isDrawing:
if self.hasPattern:
self.canvas = self.canvas_saved.copy()
else:
self.canvas = self.canvas_original.copy()
painter.begin(self.canvas)
self.paintCanvas(painter)
painter.end()
# 把 画布层 绘画到窗口上
painter.begin(self)
painter.drawPixmap(self.screenRect, self.canvas)
painter.end()
# 开始在 空白调节器层 上绘画。如果有蒙版，绘制调节器形状, 否则不绘制
else:
self.adjustment = self.adjustment_original.copy()
painter.begin(self.adjustment)
self.paintAdjustment(painter)
painter.end()
# 把 调节器层 绘画到窗口上
painter.begin(self)
painter.drawPixmap(toRect(self.screenRect), self.adjustment)
painter.end()
def paintAdjustment(self, painter):
if self.hasMask:
painter.setRenderHint(QPainter.Antialiasing, True) # 反走样
painter.setPen(Qt.NoPen)
# 在蒙版区绘制屏幕背景
painter.setBrush(QBrush(self.screen))
painter.drawRect(self.maskRect)
# 绘制线框
lineWidth = self.adjustmentLineWidth
painter.setBrush(self.blue)
painter.drawRect(
QRectF(
self.maskTopLeft + QPoint(-lineWidth, -lineWidth),
self.maskTopRight + QPoint(lineWidth, 0))
)
painter.drawRect(
QRectF(
self.maskBottomLeft + QPoint(-lineWidth, 0),
self.maskBottomRight + QPoint(lineWidth, lineWidth)
)
)
painter.drawRect(
QRectF(
self.maskTopLeft + QPoint(-lineWidth, -lineWidth),
self.maskBottomLeft + QPoint(0, lineWidth)
)
)
painter.drawRect(
QRectF(
self.maskTopRight + QPoint(0, -lineWidth),
self.maskBottomRight + QPoint(lineWidth, lineWidth)
)
)
if self.maskRect.width() > 150 and self.maskRect.height() > 150:
# 绘制点
points = [
self.maskTopLeft, self.maskTopRight, self.maskBottomLeft, self.maskBottomRight,
self.maskLeftMid, self.maskRightMid, self.maskTopMid, self.maskBottomMid
]
# -白点
whiteDotRadiusPoint = QPoint(self.adjustmentWhiteDotRadius, self.adjustmentWhiteDotRadius)
painter.setBrush(Qt.white)
for point in points:
painter.drawEllipse(QRectF(point - whiteDotRadiusPoint, point + whiteDotRadiusPoint))
# -蓝点
blueDotRadius = QPoint(self.adjustmentBlueDotRadius, self.adjustmentBlueDotRadius)
painter.setBrush(self.blue)
for point in points:
painter.drawEllipse(QRectF(point - blueDotRadius, point + blueDotRadius))
# 绘制尺寸
maskSize = (abs(int(self.maskRect.width())), abs(int(self.maskRect.height())))
painter.setFont(QFont('Monaco', 7, QFont.Bold))
painter.setPen(Qt.transparent) # 透明获得字体Rect
textRect = painter.drawText(
QRectF(self.maskTopLeft.x() + 10, self.maskTopLeft.y() - 25, 100, 20),
Qt.AlignLeft | Qt.AlignVCenter,
'{} x {}'.format(*maskSize)
)
painter.setBrush(QColor(0, 0, 0, 128)) # 黑底
padding = 5
painter.drawRect(
QRectF(
textRect.x() - padding,
textRect.y() - padding * 0.4,
textRect.width() + padding * 2,
textRect.height() + padding * 0.4
)
)
painter.setPen(Qt.white)
painter.drawText(
textRect,
Qt.AlignLeft | Qt.AlignVCenter,
'{} x {}'.format(*maskSize)
)
painter.setPen(Qt.NoPen)
def paintCanvas(self, painter):
pass
def keyPressEvent(self, QKeyEvent):
if QKeyEvent.key() == Qt.Key_Escape:
self.close()
if QKeyEvent.key() == Qt.Key_Return or QKeyEvent.key() == Qt.Key_Enter: # 大键盘、小键盘回车
if self.hasMask:
self.save()
self.close()
if QKeyEvent.modifiers() & Qt.ShiftModifier:
self.isShifting = True
def keyReleaseEvent(self, QKeyEvent):
if QKeyEvent.key() == Qt.Key_Shift:
self.isShifting = False
def save(self):
self.output = self.screen.copy()
if self.hasPattern:
painter = QPainter(self.output)
painter.drawPixmap(self.canvas)
self.output = self.output.copy(toRect(self.maskRect))
self.output.save(
u'{saveDir}/{saveName}.{format}'.format(
saveDir=self.saveDir.rstrip('/'),
saveName=self.saveName,
format=self.saveFormat.lower()
),
self.saveFormat,
self.picQuality
)
if __name__ == "__main__":
app = QApplication.instance() or QApplication(sys.argv)
win = WScreenshot()
win.show()
app.exec_()
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