Python PyQt5.QtCore.Qt.SmoothTransformation() Examples

def _paint_frame(self, event):
        if self.bgimage:
            pixmap = self._build_pixmap(self.bgimage)
            # Check we need to resize the bgimage
            if self.bgsize:
                bgsize = self.bgsize
                if self.bgsize == 'fit':
                    bgsize = self.size()
                pixmap = pixmap.scaled(bgsize, Qt.KeepAspectRatio, Qt.SmoothTransformation)
            # Calculate the x,y position
            x,y = self.bgpos
            if self.bgpos:
                if x == 'left': x = 0
                elif x == 'center': x = (self.width() / 2) - (pixmap.width() / 2)
                elif x == 'right': x = self.width() - pixmap.width()
                if y == 'top': y = 0
                elif y == 'center': y = (self.height() / 2) - (pixmap.height() / 2)
                elif y == 'bottom': y = self.height() - pixmap.height()
            # Draw the pixmap
            painter = QtGui.QPainter(self)
            painter.setOpacity(self.bgopacity)
            painter.drawPixmap(int(x), int(y), pixmap) 

def doClockwise(self):
        # 顺时针45度
        image = QImage(self.srcImage.size(),
                       QImage.Format_ARGB32_Premultiplied)
        painter = QPainter()
        painter.begin(image)
        # 以图片中心为原点
        hw = self.srcImage.width() / 2
        hh = self.srcImage.height() / 2
        painter.translate(hw, hh)
        painter.rotate(45)  # 旋转45度
        painter.drawImage(-hw, -hh, self.srcImage)  # 把图片绘制上去
        painter.end()
        self.srcImage = image  # 替换
        self.imageLabel.setPixmap(QPixmap.fromImage(self.srcImage))

#         # 下面这个旋转方法针对90度的倍数,否则图片会变大
#         trans = QTransform()
#         trans.rotate(90)
#         self.srcImage = self.srcImage.transformed(
#             trans, Qt.SmoothTransformation)
#         self.imageLabel.setPixmap(QPixmap.fromImage(self.srcImage)) 

def set_status(self, raw, exist=None):
        item = QLabel()
        item.setAlignment(Qt.AlignCenter)

        if exist is 0:
            icon = QPixmap(QUEUE_ICON).scaled(20, 20, Qt.KeepAspectRatio,
                                              Qt.SmoothTransformation)
            item.setPixmap(icon)
            item.setToolTip('Waiting in the download queue...')

        if exist is 1:
            icon = QPixmap(CHECK_ICON).scaled(20, 20, Qt.KeepAspectRatio,
                                              Qt.SmoothTransformation)
            item.setPixmap(icon)
            item.setToolTip('All the features are downloaded...')

        if exist is 2:
            item = QPushButton(self)
            item.setToolTip('Download')
            item.setIcon(QIcon(DOWNLOAD_ICON))
            item.clicked.connect(self.download_clicked)

        self.setCellWidget(raw, 0, item) 

def doAnticlockwise(self):
        # 逆时针45度
        image = QImage(self.srcImage.size(),
                       QImage.Format_ARGB32_Premultiplied)
        painter = QPainter()
        painter.begin(image)
        # 以图片中心为原点
        hw = self.srcImage.width() / 2
        hh = self.srcImage.height() / 2
        painter.translate(hw, hh)
        painter.rotate(-45)  # 旋转-45度
        painter.drawImage(-hw, -hh, self.srcImage)  # 把图片绘制上去
        painter.end()
        self.srcImage = image  # 替换
        self.imageLabel.setPixmap(QPixmap.fromImage(self.srcImage))

#         # 下面这个旋转方法针对90度的倍数,否则图片会变大
#         trans = QTransform()
#         trans.rotate(90)
#         self.srcImage = self.srcImage.transformed(
#             trans, Qt.SmoothTransformation)
#         self.imageLabel.setPixmap(QPixmap.fromImage(self.srcImage)) 

def _draw_pixmap(self, painter, draw_width, draw_height, scrolled):
        # scale pixmap
        scaled_pixmap = self._pixmap.scaledToWidth(
            draw_width,
            mode=Qt.SmoothTransformation)
        pixmap_size = scaled_pixmap.size()

        # draw the center part of the pixmap on available rect
        painter.save()
        brush = QBrush(scaled_pixmap)
        painter.setBrush(brush)
        # note: in practice, most of the time, we can't show the
        # whole artist pixmap, as a result, the artist head will be cut,
        # which causes bad visual effect. So we render the top-center part
        # of the pixmap here.
        y = (pixmap_size.height() - draw_height) // 3
        painter.translate(0, - y - scrolled)
        rect = QRect(0, y, draw_width, draw_height)
        painter.drawRect(rect)
        painter.restore() 

def paint(self, painter, option, index):
        column = index.column()
        if column == 1:
            pixmap = None
            status = index.data(Qt.UserRole)
            if status == MagicFolderChecker.LOADING:
                self.waiting_movie.setPaused(False)
                pixmap = self.waiting_movie.currentPixmap().scaled(
                    20, 20, Qt.KeepAspectRatio, Qt.SmoothTransformation
                )
            elif status in (
                MagicFolderChecker.SYNCING,
                MagicFolderChecker.SCANNING,
            ):
                self.sync_movie.setPaused(False)
                pixmap = self.sync_movie.currentPixmap().scaled(
                    20, 20, Qt.KeepAspectRatio, Qt.SmoothTransformation
                )
            if pixmap:
                point = option.rect.topLeft()
                painter.drawPixmap(QPoint(point.x(), point.y() + 5), pixmap)
                option.rect = option.rect.translated(pixmap.width(), 0)
        super(Delegate, self).paint(painter, option, index) 

def paintEvent(self, event):
        ancho, altura = self.width(), self.height()
        icono = self.icono.scaled(ancho, altura, Qt.KeepAspectRatio, Qt.SmoothTransformation)

        pintor = QPainter()
        
        pintor.begin(self)
        pintor.setRenderHint(QPainter.Antialiasing, True)
        pintor.setPen(Qt.NoPen)
        pintor.drawPixmap(0, 0, icono, 0, 0, 0, 0)
        pintor.setPen(Qt.white)
        pintor.drawText(event.rect(), Qt.AlignCenter, self.etiqueta)
        pintor.setPen(Qt.NoPen)
        pintor.setBrush(self.opacidad)
        pintor.drawEllipse(0, 0, ancho, altura)
        pintor.end()

        self.setMask(icono.mask()) 

def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs)
        layout = QVBoxLayout(self)
        self.imgLabel = QLabel(self)
        self.coldSlider = QSlider(Qt.Horizontal, self)
        self.coldSlider.valueChanged.connect(self.doChange)
        self.coldSlider.setRange(0, 255)
        layout.addWidget(self.imgLabel)
        layout.addWidget(self.coldSlider)

        # 加载图片
        self.srcImg = QImage('src.jpg')
        self.imgLabel.setPixmap(QPixmap.fromImage(self.srcImg).scaledToWidth(800, Qt.SmoothTransformation))
        # DLL库
        self.dll = CDLL('Cold.dll')
        print(self.dll) 

def initUI(self):

      # ==================== WIDGET QLABEL =======================
        
        self.labelImagen = QLabelClickable(self)
        self.labelImagen.setGeometry(15, 15, 118, 130)
        self.labelImagen.setToolTip("Imagen")
        self.labelImagen.setCursor(Qt.PointingHandCursor)

        self.labelImagen.setStyleSheet("QLabel {background-color: white; border: 1px solid "
                                       "#01DFD7; border-radius: 5px;}")

        self.pixmapImagen = QPixmap("Qt.png").scaled(112, 128, Qt.KeepAspectRatio,
                                                     Qt.SmoothTransformation)
        self.labelImagen.setPixmap(self.pixmapImagen)
        self.labelImagen.setAlignment(Qt.AlignCenter)

      # ===================== EVENTO QLABEL ======================

      # Llamar función al hacer clic o doble clic sobre el label
        self.labelImagen.clicked.connect(self.Clic)

  # ======================= FUNCIONES ============================ 

def initUI(self):
        label = QLabel(self)
        label.setPixmap(QPixmap("Imagenes/siacle.jpg").scaled(450, 450, Qt.KeepAspectRatio,
                                                              Qt.SmoothTransformation))
        label.move(0, 0)

        labelAcerca = QLabel("SIACLE: sistema para administrar clientes, diseñado y\n"
                             "desarrollado por ANDRES NIÑO con fines educativos.", self)
        labelAcerca.move(10, 460)

        botonCerrar = QPushButton("Cerrar", self)
        botonCerrar.setFixedSize(80, 32)
        botonCerrar.move(360, 457)

      # ========================= EVENTO =========================

        botonCerrar.clicked.connect(self.close)


# ========================= CLASE Siacle =========================== 

def initUI(self):
        label = QLabel(self)
        label.setPixmap(QPixmap("Imagenes/siacle.jpg").scaled(450, 450, Qt.KeepAspectRatio,
                                                              Qt.SmoothTransformation))
        label.move(0, 0)

        botonCerrar = QPushButton("Cerrar", self)
        botonCerrar.setFixedSize(430, 32)
        botonCerrar.move(10, 457)

      # ========================= EVENTO =========================

        botonCerrar.clicked.connect(self.close)


# ========================= CLASE Acerca =========================== 

def setBoxIcon(self, box, caller):
        if HW_devices[self.model][0] == "TREZOR One":
            box.setIconPixmap(caller.tabMain.trezorOneImg.scaledToHeight(200, Qt.SmoothTransformation))
        else:
            box.setIconPixmap(caller.tabMain.trezorImg.scaledToHeight(200, Qt.SmoothTransformation)) 

def doChange(self, value):
        t = time()
        img = self.srcImg.copy()  # 复制一份
        # For PyQt5
        self.dll.cold(sip.unwrapinstance(img), value)
        # For PySide2
        # self.dll.cold(shiboken2.getCppPointer(img)[0], value)
        self.imgLabel.setPixmap(QPixmap.fromImage(img).scaledToWidth(800, Qt.SmoothTransformation))
        print('use time:', time() - t) 

def __init__(self, caller, *args, **kwargs):
        QWidget.__init__(self)
        self.caller = caller
        self.initLayout()
        self.loadIcons()
        self.refreshProposals_btn.setIcon(self.refresh_icon)
        self.budgetProjection_btn.setIcon(self.list_icon)
        self.timeIconLabel.setPixmap(self.time_icon.scaledToHeight(20, Qt.SmoothTransformation))
        self.questionLabel.setPixmap(self.question_icon.scaledToHeight(15, Qt.SmoothTransformation))
        self.loadCacheData() 

def mousePressEvent(self, event):
        # retrieve the label 
        child = self.childAt(event.pos())
        
        if not child:
            return
        
        self.controller.mode = 'selection'
        # update the creation mode to the appropriate subtype
        self.controller.creation_mode = child.subtype
        
        pixmap = QPixmap(child.pixmap().scaled(
                                            QSize(50, 50), 
                                            Qt.KeepAspectRatio,
                                            Qt.SmoothTransformation
                                            ))

        mime_data = QtCore.QMimeData()
        mime_data.setData('application/x-dnditemdata', QtCore.QByteArray())

        drag = QtGui.QDrag(self)
        drag.setMimeData(mime_data)
        drag.setPixmap(pixmap)
        drag.setHotSpot(event.pos() - child.pos() + QPoint(-3, -10))

        if drag.exec_(Qt.CopyAction | Qt.MoveAction, Qt.CopyAction) == Qt.MoveAction:
            child.close()
        else:
            child.show() 

def loadIcons(self):
        # Load Icons
        self.ledPurpleH_icon = QPixmap(os.path.join(self.imgDir, 'icon_purpleLedH.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.ledGrayH_icon = QPixmap(os.path.join(self.imgDir, 'icon_grayLedH.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.ledHalfPurpleH_icon = QPixmap(os.path.join(self.imgDir, 'icon_halfPurpleLedH.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.ledRedV_icon = QPixmap(os.path.join(self.imgDir, 'icon_redLedV.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.ledGrayV_icon = QPixmap(os.path.join(self.imgDir, 'icon_grayLedV.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.ledGreenV_icon = QPixmap(os.path.join(self.imgDir, 'icon_greenLedV.png')).scaledToHeight(17, Qt.SmoothTransformation)
        self.lastBlock_icon = QPixmap(os.path.join(self.imgDir, 'icon_lastBlock.png')).scaledToHeight(15, Qt.SmoothTransformation)
        self.connGreen_icon = QPixmap(os.path.join(self.imgDir, 'icon_greenConn.png')).scaledToHeight(15, Qt.SmoothTransformation)
        self.connRed_icon = QPixmap(os.path.join(self.imgDir, 'icon_redConn.png')).scaledToHeight(15, Qt.SmoothTransformation)
        self.connOrange_icon = QPixmap(os.path.join(self.imgDir, 'icon_orangeConn.png')).scaledToHeight(15, Qt.SmoothTransformation) 

def __init__(self, resource_filename, size=None):
        super().__init__(resource(resource_filename))
        if size:
            self.swap(
                self.scaled(
                    size, size, Qt.KeepAspectRatio, Qt.SmoothTransformation
                )
            ) 

def _do_load_thumbnail(self):
        pixmap = QPixmap(self.path)
        if not pixmap.isNull():
            self.icon.setPixmap(
                pixmap.scaled(
                    48, 48, Qt.IgnoreAspectRatio, Qt.SmoothTransformation
                )
            ) 

def apply_pixmap(self):
        """Apply a scaled pixmap without modifying the dimension of the original one."""
        if self.pixmap:
            self.setPixmap(
                self.pixmap.scaled(
                    self.size(), Qt.IgnoreAspectRatio, Qt.SmoothTransformation
                )
            ) 

def __init__(self, *args, antialiasing=True, **kwargs):
        super(Label, self).__init__(*args, **kwargs)
        self.Antialiasing = antialiasing
        self.setMaximumSize(200, 200)
        self.setMinimumSize(200, 200)
        self.radius = 100

        #####################核心实现#########################
        self.target = QPixmap(self.size())  # 大小和控件一样
        self.target.fill(Qt.transparent)  # 填充背景为透明

        p = QPixmap("Data/Images/head.jpg").scaled(  # 加载图片并缩放和控件一样大
            200, 200, Qt.KeepAspectRatioByExpanding, Qt.SmoothTransformation)

        painter = QPainter(self.target)
        if self.Antialiasing:
            # 抗锯齿
            painter.setRenderHint(QPainter.Antialiasing, True)
            painter.setRenderHint(QPainter.HighQualityAntialiasing, True)
            painter.setRenderHint(QPainter.SmoothPixmapTransform, True)

        #         painter.setPen(# 测试圆圈
        #             QPen(Qt.red, 5, Qt.SolidLine, Qt.RoundCap, Qt.RoundJoin))
        path = QPainterPath()
        path.addRoundedRect(
            0, 0, self.width(), self.height(), self.radius, self.radius)
        # **** 切割为圆形 ****#
        painter.setClipPath(path)
        #         painter.drawPath(path)  # 测试圆圈

        painter.drawPixmap(0, 0, p)
        self.setPixmap(self.target)
        #####################核心实现######################### 

def get_app_icon():
    """ Returns Icon (QPixmap)
    """
    return QPixmap(resource_path('assets/dwarf.png')).scaledToHeight(75, Qt.SmoothTransformation) 

def mousePressEvent(self, event):
        # retrieve the label 
        child = self.childAt(event.pos())
        if not child:
            return
        
        self.controller.mode = 'selection'
        # update the creation mode to the appropriate subtype
        self.controller.creation_mode = child.subtype
        # we change the view if necessary:
        # if it is a site, we switch the site view
        # if it is anything else and we are in the site view, we switch 
        # to the network view
        if child.subtype == 'site':
            self.project.show_site_view()
        else:
            if self.project.view_type == 'site':
                self.project.show_network_view()
        
        pixmap = QPixmap(child.pixmap().scaled(
                                            QSize(50, 50), 
                                            Qt.KeepAspectRatio,
                                            Qt.SmoothTransformation
                                            ))

        mime_data = QtCore.QMimeData()
        mime_data.setData('application/x-dnditemdata', QtCore.QByteArray())

        drag = QtGui.QDrag(self)
        drag.setMimeData(mime_data)
        drag.setPixmap(pixmap)
        drag.setHotSpot(event.pos() - child.pos() + QPoint(-3, -10))

        if drag.exec_(Qt.CopyAction | Qt.MoveAction, Qt.CopyAction) == Qt.MoveAction:
            child.close()
        else:
            child.show() 

def mousePressEvent(self, event):
        # retrieve the label 
        child = self.childAt(event.pos())
        
        if not child:
            return
        
        self.controller.mode = 'selection'
        # update the creation mode to the appropriate subtype
        self.controller.creation_mode = child.subtype
        
        pixmap = QPixmap(child.pixmap().scaled(
                                            QSize(50, 50), 
                                            Qt.KeepAspectRatio,
                                            Qt.SmoothTransformation
                                            ))

        mime_data = QtCore.QMimeData()
        mime_data.setData('application/x-dnditemdata', QtCore.QByteArray())

        drag = QtGui.QDrag(self)
        drag.setMimeData(mime_data)
        drag.setPixmap(pixmap)
        drag.setHotSpot(event.pos() - child.pos() + QPoint(-3, -10))

        if drag.exec_(Qt.CopyAction | Qt.MoveAction, Qt.CopyAction) == Qt.MoveAction:
            child.close()
        else:
            child.show() 

def seleccionarImagen(self):
        imagen, extension = QFileDialog.getOpenFileName(self, "Seleccionar imagen", getcwd(),
                                                        "Archivos de imagen (*.png *.jpg)",
                                                        options=QFileDialog.Options())
          
        if imagen:
            # Adaptar imagen
            pixmapImagen = QPixmap(imagen).scaled(166, 178, Qt.KeepAspectRatio,
                                                  Qt.SmoothTransformation)

            # Mostrar imagen
            self.labelImagen.setPixmap(pixmapImagen) 

def seleccionarImagen(self):
        imagen, extension = QFileDialog.getOpenFileName(self, "Seleccionar imagen", getcwd(),
                                                        "Archivos de imagen (*.png *.jpg)",
                                                        options=QFileDialog.Options())
          
        if imagen:
            # Adaptar imagen
            pixmapImagen = QPixmap(imagen).scaled(112, 128, Qt.KeepAspectRatio,
                                                  Qt.SmoothTransformation)

            # Mostrar imagen
            self.labelImagen.setPixmap(pixmapImagen)


# ================================================================ 

def initUI(self):

      # ===================== WIDGET QLABEL ======================

        label = QLabel(self)
        label.setGeometry(20, 20, 100, 100)
        label.setPixmap(QPixmap(":imagenes/Python.png").scaled(100, 100, Qt.KeepAspectRatio,
                                                               Qt.SmoothTransformation))


# ================================================================ 

def seleccionarImagen(self):
        imagen, extension = QFileDialog.getOpenFileName(self, "Seleccionar imagen", getcwd(),
                                                        "Archivos de imagen (*.png *.jpg)",
                                                        options=QFileDialog.Options())
          
        if imagen:
            # Adaptar imagen
            pixmapImagen = QPixmap(imagen).scaled(166, 178, Qt.KeepAspectRatio,
                                                  Qt.SmoothTransformation)

            # Mostrar imagen
            self.labelImagen.setPixmap(pixmapImagen) 

def set_cover_pixmap(self, pixmap):
        self._cover_label.show()
        self._cover_label.setPixmap(
            pixmap.scaledToWidth(self._cover_label.width(),
                                 mode=Qt.SmoothTransformation)) 

def paintEvent(self, e):
        """
        draw pixmap with border radius

        We found two way to draw pixmap with border radius,
        one is as follow, the other way is using bitmap mask,
        but in our practice, the mask way has poor render effects
        """
        if self._pixmap is None:
            return
        radius = 3
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)
        painter.setRenderHint(QPainter.SmoothPixmapTransform)
        scaled_pixmap = self._pixmap.scaledToWidth(
            self.width(),
            mode=Qt.SmoothTransformation
        )
        size = scaled_pixmap.size()
        brush = QBrush(scaled_pixmap)
        painter.setBrush(brush)
        painter.setPen(Qt.NoPen)
        y = (size.height() - self.height()) // 2
        painter.save()
        painter.translate(0, -y)
        rect = QRect(0, y, self.width(), self.height())
        painter.drawRoundedRect(rect, radius, radius)
        painter.restore()
        painter.end() 

def update_preview(self):
        if not self._preview_pixmap:
            return

        scaled = self._preview_pixmap.scaled(
            self._ui.lblPreview.width(),
            self._ui.lblPreview.height(),
            Qt.KeepAspectRatio,
            Qt.SmoothTransformation,
        )
        self._ui.lblPreview.setPixmap(scaled)