pyqt-viewer-widget

PyQt viewer widget which helps you make viewer application easily

Requirements

PyQt5 >= 5.8

Overview

This is image viewer widget, not an application itself. But you can make image viewer application out of this.

For example, apps below are using this efficiently.

• pyqt-comic-viewer - Comic reading app

• pyqt-html-viewer - HTML viewer app

• pyqt-svg-viewer - SVG viewer app

Setup

python -m pip install pyqt-viewer-widget

Included Package

• pyqt-toast - to notify user the very beginning/last page when flip the page

• pyqt-single-image-graphics-view - main view

Feature

• setExtensions(extensions: list) to set file extensions to show on the view (e.g. ['.html'])

• addFilenames(filenames: list, cur_filename: str = '') - Add filenames. cur_filename is file's name which you want to set as current file.

• setFilenames(filenames: list, cur_filename: str = '') - Clear file list before adding files.

• addDirectory(dirname: str, cur_filename: str = '') - Add files in the directory

• setDirectory(dirname: str, cur_filename: str = '') - Clear file list before adding files in the directory

• setCurrentIndex(idx: int), getCurrentIndex() -> int. The latter one can be used for checking at least one file exists or not.

• setCurrentFilename(filename: str), getCurrentFilename() -> str.

• clear()

• Flip the page back and forth with prev, next button on bottom navigation widget, mouse wheel, left and right pad of keyboards.

• Being able to check the current page

• Being able to toggle the visibility of the bottom widget

• Give the emitting signal when clicked prev, next, close buttons: prevSignal(str), nextSignal(str), closeSignal(bool) - prev/next signals' arguments are previous/next file's name. close signal's bool value is always False to set the visibility of bottom widget (navigation widget) of viewer widget False. There's also clearSignal which is emitted when there is no file. (except for init moment)

• When you've got the absoulte beginning/last of the files list, toast(pyqt-toast) will show up. You can get either direction of toast with getFirstPageToast, getLastPageToast to change the toast's style such as font, color.

• setView(view: QWidget), getView() -> QWidget

• setBottomWidgetVisible(f: bool) to toggle the visibility of bottom navigation bar.

• getFirstPageToast() -> Toast, getLastPageToast() -> Toast

• setWindowTitleBasedOnCurrentFileEnabled(f: bool, prefix: str) to set the title based on current file like "Prefix - def.png" if current file of viewer is "def.png". You can activate the feature by giving True to first argument f. You can give the default window title to prefix.

• isWindowTitleBasedOnCurrentFileEnabled() -> bool

• removeSomeFilesFromViewer(filenames_to_remove: list) is used when you want to remove some files in viewer, not all files. If filenames_to_remove includes the file name which was not included in list, error will be occured.

• setHome(widget: QWidget) to set home page widget, goHome().

Simple Example

Code Example (Extremely basic image viewer)

import os



from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton

from pyqt_viewer_widget import ViewerWidget





class MainWindow(QMainWindow):

    def __init__(self):

        super().__init__()

        self.__initUi()



    def __initUi(self):

        self.__viewerWidget = ViewerWidget()

        dirname = os.path.join(os.getcwd(), 'viewerWidgetExampleImagesDir')

        self.__viewerWidget.setExtensions(['.jpg'])

        self.__viewerWidget.setDirectory(dirname)

        self.__viewerWidget.closeSignal.connect(self.__bottomWidgetClosed)



        self.setCentralWidget(self.__viewerWidget)

        self.__setToolBar()



    def __setToolBar(self):

        self.__bottomWidgetToggleBtn = QPushButton('Show')

        self.__bottomWidgetToggleBtn.setCheckable(True)

        self.__bottomWidgetToggleBtn.setChecked(True)

        self.__bottomWidgetToggleBtn.toggled.connect(self.__viewerWidget.setBottomWidgetVisible)



        fileToolbar = self.addToolBar('File')

        fileToolbar.addWidget(self.__bottomWidgetToggleBtn)

        fileToolbar.setMovable(False)



    def __bottomWidgetClosed(self):

        self.__bottomWidgetToggleBtn.setChecked(False)





if __name__ == "__main__":

    import sys



    app = QApplication(sys.argv)

    mainWindow = MainWindow()

    mainWindow.show()

    sys.exit(app.exec_())

Result

https://user-images.githubusercontent.com/55078043/145040849-0c7326ed-e043-4a8b-8c55-c9b7e1d1756e.mp4

Note: This is result of very first version.