添加亚克力标签

README.md

@@ -137,6 +137,19 @@ A collection of commonly used widgets.
         <img src="screenshot/flow_layout.gif" />
       </td>
     </tr>
+    <tr>
+      <td>
+        Acrylic Label
+      </td>
+      <td>
+        <code>AcrylicLabel</code>
+      </td>
+    </tr>
+    <tr>
+      <td colspan="2" align="center">
+        <img src="screenshot/acrylic_label.png"/>
+      </td>
+    </tr>
     <tr>
       <td>
         Smooth Scroll Area

widgets/acrylic_label/acrylic_label.py

+# coding:utf-8
+import numpy as np
+from PIL import Image
+from PyQt5.QtCore import Qt
+from PyQt5.QtGui import QBrush, QColor, QImage, QPainter, QPixmap
+from PyQt5.QtWidgets import QLabel
+from scipy.ndimage.filters import gaussian_filter
+
+
+def gaussianBlur(imagePath: str, blurRadius=18, brightFactor=1, blurPicSize: tuple = None) -> np.ndarray:
+    if not imagePath.startswith(':'):
+        image = Image.open(imagePath)
+    else:
+        image = Image.fromqpixmap(QPixmap(imagePath))
+
+    if blurPicSize:
+        # adjust image size to reduce computation
+        w, h = image.size
+        ratio = min(blurPicSize[0] / w, blurPicSize[1] / h)
+        w_, h_ = w * ratio, h * ratio
+
+        if w_ < w:
+            image = image.resize((int(w_), int(h_)), Image.ANTIALIAS)
+
+    image = np.array(image)
+
+    # handle gray image
+    if len(image.shape) == 2:
+        image = np.stack([image, image, image], axis=-1)
+
+    # blur each channel
+    for i in range(3):
+        image[:, :, i] = gaussian_filter(
+            image[:, :, i], blurRadius) * brightFactor
+
+    return image
+
+
+class AcrylicTextureLabel(QLabel):
+    """ Acrylic texture label """
+
+    def __init__(self, tintColor: QColor, luminosityColor: QColor, noiseOpacity=0.03, parent=None):
+        """
+        Parameters
+        ----------
+        tintColor: QColor
+            RGB tint color
+
+        luminosityColor: QColor
+            luminosity layer color
+
+        noiseOpacity: float
+            noise layer opacity
+
+        parent:
+            parent window
+        """
+        super().__init__(parent=parent)
+        self.tintColor = QColor(tintColor)
+        self.luminosityColor = QColor(luminosityColor)
+        self.noiseOpacity = noiseOpacity
+        self.noiseImage = QImage('resource/noise.png')
+        self.setAttribute(Qt.WA_TranslucentBackground)
+
+    def setTintColor(self, color: QColor):
+        self.tintColor = color
+        self.update()
+
+    def paintEvent(self, e):
+        acrylicTexture = QImage(64, 64, QImage.Format_ARGB32_Premultiplied)
+
+        # paint luminosity layer
+        acrylicTexture.fill(self.luminosityColor)
+
+        # paint tint color
+        painter = QPainter(acrylicTexture)
+        painter.fillRect(acrylicTexture.rect(), self.tintColor)
+
+        # paint noise
+        painter.setOpacity(self.noiseOpacity)
+        painter.drawImage(acrylicTexture.rect(), self.noiseImage)
+
+        acrylicBrush = QBrush(acrylicTexture)
+        painter = QPainter(self)
+        painter.fillRect(self.rect(), acrylicBrush)
+
+
+class AcrylicLabel(QLabel):
+    """ Acrylic label """
+
+    def __init__(self, blurRadius: int, tintColor: QColor, luminosityColor=QColor(255, 255, 255, 0),
+                 maxBlurSize: tuple = None, parent=None):
+        """
+        Parameters
+        ----------
+        blurRadius: int
+            blur radius
+
+        tintColor: QColor
+            tint color
+
+        luminosityColor: QColor
+            luminosity layer color
+
+        maxBlurSize: tuple
+            maximum image size
+
+        parent:
+            parent window
+        """
+        super().__init__(parent=parent)
+        self.imagePath = ''
+        self.blurPixmap = QPixmap()
+        self.blurRadius = blurRadius
+        self.maxBlurSize = maxBlurSize
+        self.acrylicTextureLabel = AcrylicTextureLabel(
+            tintColor, luminosityColor, parent=self)
+
+    def setImage(self, imagePath: str):
+        """ set the image to be blurred """
+        if imagePath == self.imagePath:
+            return
+
+        self.imagePath = imagePath
+        image = Image.fromarray(gaussianBlur(
+            imagePath, self.blurRadius, 0.85, self.maxBlurSize))
+        self.blurPixmap = image.toqpixmap()  # type:QPixmap
+        self.setPixmap(self.blurPixmap)
+        self.adjustSize()
+
+    def setTintColor(self, color: QColor):
+        self.acrylicTextureLabel.setTintColor(color)
+
+    def resizeEvent(self, e):
+        super().resizeEvent(e)
+        self.acrylicTextureLabel.resize(self.size())
+        self.setPixmap(self.blurPixmap.scaled(
+            self.size(), Qt.KeepAspectRatioByExpanding, Qt.SmoothTransformation))

widgets/acrylic_label/demo.py

+# coding:utf-8
+import sys
+
+from PyQt5.QtGui import QColor
+from PyQt5.QtWidgets import QApplication
+
+from acrylic_label import AcrylicLabel
+
+
+app = QApplication(sys.argv)
+w = AcrylicLabel(20, QColor(105, 114, 168, 102))
+w.setImage('resource/埃罗芒阿老师.jpg')
+w.show()
+app.exec_()