Mercurial Repositories > eric / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/eric7/PdfViewer/PdfZoomSelector.py	Sat Jan 14 18:25:26 2023 +0100
@@ -0,0 +1,105 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2023 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a widget to select a PDF zoom factor.
+"""
+
+from PyQt6.QtCore import pyqtSignal, pyqtSlot, Qt
+from PyQt6.QtPdfWidgets import QPdfView
+from PyQt6.QtWidgets import QComboBox
+
+
+class PdfZoomSelector(QComboBox):
+    """
+    Class implementing a widget to select a PDF zoom factor.
+    
+    @signal zoomFactorChanged(factor) emitted to indicate the selected zoom factor
+    @signal zoomModeChanged(zoomMode) emitted to indicate the selected zoom mode
+    """
+    zoomFactorChanged = pyqtSignal(float)
+    zoomModeChanged = pyqtSignal(QPdfView.ZoomMode)
+
+    def __init__(self, parent=None):
+        """
+        Constructor
+
+        @param parent reference to the parent widget (defaults to None)
+        @type QWidget (optional)
+        """
+        super().__init__(parent)
+
+        self.setEditable(True)
+        self.setInsertPolicy(QComboBox.InsertPolicy.NoInsert)
+
+        self.addItem(self.tr("Page Width"))
+        self.addItem(self.tr("Whole Page"))
+        self.addItem(self.tr("12%"))
+        self.addItem(self.tr("25%"))
+        self.addItem(self.tr("33%"))
+        self.addItem(self.tr("50%"))
+        self.addItem(self.tr("66%"))
+        self.addItem(self.tr("75%"))
+        self.addItem(self.tr("100%"))
+        self.addItem(self.tr("125%"))
+        self.addItem(self.tr("150%"))
+        self.addItem(self.tr("200%"))
+        self.addItem(self.tr("400%"))
+        self.addItem(self.tr("800%"))
+        self.addItem(self.tr("1600%"))
+        self.addItem(self.tr("2500%"))
+        self.addItem(self.tr("5000%"))
+
+        self.lineEdit().setAlignment(Qt.AlignmentFlag.AlignCenter)
+
+        self.currentTextChanged.connect(self.__processText)
+        self.lineEdit().editingFinished.connect(self.__editingFinished)
+
+    @pyqtSlot()
+    def __editingFinished(self):
+        """
+        Private slot handling the end of entering a zoom factor.
+        """
+        self.__processText(self.lineEdit().text())
+
+    @pyqtSlot(str)
+    def __processText(self, text):
+        """
+        Private slot to handle the change of the entered zoom factor.
+
+        @param text text to be handled
+        @type str
+        """
+        if text == self.tr("Page Width"):
+            self.zoomModeChanged.emit(QPdfView.ZoomMode.FitToWidth)
+        elif text == self.tr("Whole Page"):
+            self.zoomModeChanged.emit(QPdfView.ZoomMode.FitInView)
+        else:
+            withoutPercent = text.replace("%", "")
+            try:
+                zoomLevel = int(withoutPercent)
+                factor = zoomLevel / 100.0
+            except ValueError:
+                factor = 1.0
+
+            self.zoomModeChanged.emit(QPdfView.ZoomMode.Custom)
+            self.zoomFactorChanged.emit(factor)
+
+    @pyqtSlot()
+    def reset(self):
+        """
+        Public slot to reset the zoom factor to 100%.
+        """
+        self.setCurrentIndex(8)  # index 8 is 100%
+
+    @pyqtSlot(float)
+    def setZoomFactor(self, zoomFactor):
+        """
+        Public slot to set the current zoom factor.
+
+        @param zoomFactor current zoom factor
+        @type float
+        """
+        self.setCurrentText(self.tr("{0}%").format(round(zoomFactor * 100)))