remi——基于python开发的超轻量级REMote接口库帮助你高效构建属于自己的GUI系统

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这两天发现一个比较好玩的主要用于GUI开发的第三方库remi，是基于python开发的，整体非常的轻量化，官方介绍大概是100 Kbytes，项目地址在这里，如下所示：

目前已经累积收获了3.4k的star量，还是很不错的了。

安装方式非常简单，一行命令就可以了：

pip install remi

接下来我们来开发一个简单的实例，如下所示：

import remi.gui as gui from remi import start, App class MyApp(App): def __init__(self, *args): super(MyApp, self).__init__(*args) def main(self): container = gui.VBox(width=120, height=100) self.lbl = gui.Label('Hello world!') self.bt = gui.Button('Press me!') # setting the listener for the onclick event of the button self.bt.onclick.do(self.on_button_pressed) # appending a widget to another, the first argument is a string key container.append(self.lbl) container.append(self.bt) # returning the root widget return container # listener function def on_button_pressed(self, widget): self.lbl.set_text('Button pressed!') self.bt.set_text('Hi!') # starts the web server start(MyApp, port=8081)

终端执行该代码模型即可，实例效果如下所示：

点击之后效果如下所示：

接下来我们来看一个复杂的实例，核心代码实现如下所示：

""" Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. """ import remi.gui as gui from remi import start, App from threading import Timer class MyApp(App): def __init__(self, *args): super(MyApp, self).__init__(*args) def idle(self): self.counter.set_text('Running Time: ' + str(self.count)) self.progress.set_value(self.count%100) def main(self): # the margin 0px auto centers the main container verticalContainer = gui.Container(width=540, margin='0px auto', style={'display': 'block', 'overflow': 'hidden'}) horizontalContainer = gui.Container(width='100%', layout_orientation=gui.Container.LAYOUT_HORIZONTAL, margin='0px', style={'display': 'block', 'overflow': 'auto'}) subContainerLeft = gui.Container(width=320, style={'display': 'block', 'overflow': 'auto', 'text-align': 'center'}) self.img = gui.Image('/res:logo.png', height=100, margin='10px') self.img.onclick.do(self.on_img_clicked) self.table = gui.Table.new_from_list([('ID', 'First Name', 'Last Name'), ('101', 'Danny', 'Young'), ('102', 'Christine', 'Holand'), ('103', 'Lars', 'Gordon'), ('104', 'Roberto', 'Robitaille'), ('105', 'Maria', 'Papadopoulos')], width=300, height=200, margin='10px') self.table.on_table_row_click.do(self.on_table_row_click) # the arguments are width - height - layoutOrientationOrizontal subContainerRight = gui.Container(style={'width': '220px', 'display': 'block', 'overflow': 'auto', 'text-align': 'center'}) self.count = 0 self.counter = gui.Label('', width=200, height=30, margin='10px') self.lbl = gui.Label('This is a LABEL!', width=200, height=30, margin='10px') self.bt = gui.Button('Press me!', width=200, height=30, margin='10px') # setting the listener for the onclick event of the button self.bt.onclick.do(self.on_button_pressed) self.txt = gui.TextInput(width=200, height=30, margin='10px') self.txt.set_text('This is a TEXTAREA') self.txt.onchange.do(self.on_text_area_change) self.spin = gui.SpinBox(1, 0, 100, width=200, height=30, margin='10px') self.spin.onchange.do(self.on_spin_change) self.progress = gui.Progress(1, 100, width=200, height=5) self.check = gui.CheckBoxLabel('Label checkbox', True, width=200, height=30, margin='10px') self.check.onchange.do(self.on_check_change) self.btInputDiag = gui.Button('Open InputDialog', width=200, height=30, margin='10px') self.btInputDiag.onclick.do(self.open_input_dialog) self.btFileDiag = gui.Button('File Selection Dialog', width=200, height=30, margin='10px') self.btFileDiag.onclick.do(self.open_fileselection_dialog) self.btUploadFile = gui.FileUploader('./', width=200, height=30, margin='10px') self.btUploadFile.onsuccess.do(self.fileupload_on_success) self.btUploadFile.onfailed.do(self.fileupload_on_failed) items = ('Danny Young','Christine Holand','Lars Gordon','Roberto Robitaille') self.listView = gui.ListView.new_from_list(items, width=300, height=120, margin='10px') self.listView.onselection.do(self.list_view_on_selected) self.link = gui.Link("http://localhost:8081", "A link to here", width=200, height=30, margin='10px') self.dropDown = gui.DropDown.new_from_list(('DropDownItem 0', 'DropDownItem 1'), width=200, height=20, margin='10px') self.dropDown.onchange.do(self.drop_down_changed) self.dropDown.select_by_value('DropDownItem 0') self.slider = gui.Slider(10, 0, 100, 5, width=200, height=20, margin='10px') self.slider.onchange.do(self.slider_changed) self.colorPicker = gui.ColorPicker('#ffbb00', width=200, height=20, margin='10px') self.colorPicker.onchange.do(self.color_picker_changed) self.date = gui.Date('2015-04-13', width=200, height=20, margin='10px') self.date.onchange.do(self.date_changed) self.video = gui.Widget( _type='iframe', width=290, height=200, margin='10px') self.video.attributes['src'] = "https://drive.google.com/file/d/0B0J9Lq_MRyn4UFRsblR3UTBZRHc/preview" self.video.attributes['width'] = '100%' self.video.attributes['height'] = '100%' self.video.attributes['controls'] = 'true' self.video.style['border'] = 'none' self.tree = gui.TreeView(width='100%', height=300) ti1 = gui.TreeItem("Item1") ti2 = gui.TreeItem("Item2") ti3 = gui.TreeItem("Item3") subti1 = gui.TreeItem("Sub Item1") subti2 = gui.TreeItem("Sub Item2") subti3 = gui.TreeItem("Sub Item3") subti4 = gui.TreeItem("Sub Item4") subsubti1 = gui.TreeItem("Sub Sub Item1") subsubti2 = gui.TreeItem("Sub Sub Item2") subsubti3 = gui.TreeItem("Sub Sub Item3") self.tree.append([ti1, ti2, ti3]) ti2.append([subti1, subti2, subti3, subti4]) subti4.append([subsubti1, subsubti2, subsubti3]) # appending a widget to another, the first argument is a string key subContainerRight.append([self.counter, self.lbl, self.bt, self.txt, self.spin, self.progress, self.check, self.btInputDiag, self.btFileDiag]) # use a defined key as we replace this widget later fdownloader = gui.FileDownloader('download test', '../remi/res/logo.png', width=200, height=30, margin='10px') subContainerRight.append(fdownloader, key='file_downloader') subContainerRight.append([self.btUploadFile, self.dropDown, self.slider, self.colorPicker, self.date, self.tree]) self.subContainerRight = subContainerRight subContainerLeft.append([self.img, self.table, self.listView, self.link, self.video]) horizontalContainer.append([subContainerLeft, subContainerRight]) menu = gui.Menu(width='100%', height='30px') m1 = gui.MenuItem('File', width=100, height=30) m2 = gui.MenuItem('View', width=100, height=30) m2.onclick.do(self.menu_view_clicked) m11 = gui.MenuItem('Save', width=100, height=30) m12 = gui.MenuItem('Open', width=100, height=30) m12.onclick.do(self.menu_open_clicked) m111 = gui.MenuItem('Save', width=100, height=30) m111.onclick.do(self.menu_save_clicked) m112 = gui.MenuItem('Save as', width=100, height=30) m112.onclick.do(self.menu_saveas_clicked) m3 = gui.MenuItem('Dialog', width=100, height=30) m3.onclick.do(self.menu_dialog_clicked) menu.append([m1, m2, m3]) m1.append([m11, m12]) m11.append([m111, m112]) menubar = gui.MenuBar(width='100%', height='30px') menubar.append(menu) verticalContainer.append([menubar, horizontalContainer]) #this flag will be used to stop the display_counter Timer self.stop_flag = False # kick of regular display of counter self.display_counter() # returning the root widget return verticalContainer def display_counter(self): self.count += 1 if not self.stop_flag: Timer(1, self.display_counter).start() def menu_dialog_clicked(self, widget): self.dialog = gui.GenericDialog(title='Dialog Box', message='Click Ok to transfer content to main page', width='500px') self.dtextinput = gui.TextInput(width=200, height=30) self.dtextinput.set_value('Initial Text') self.dialog.add_field_with_label('dtextinput', 'Text Input', self.dtextinput) self.dcheck = gui.CheckBox(False, width=200, height=30) self.dialog.add_field_with_label('dcheck', 'Label Checkbox', self.dcheck) values = ('Danny Young', 'Christine Holand', 'Lars Gordon', 'Roberto Robitaille') self.dlistView = gui.ListView.new_from_list(values, width=200, height=120) self.dialog.add_field_with_label('dlistView', 'Listview', self.dlistView) self.ddropdown = gui.DropDown.new_from_list(('DropDownItem 0', 'DropDownItem 1'), width=200, height=20) self.dialog.add_field_with_label('ddropdown', 'Dropdown', self.ddropdown) self.dspinbox = gui.SpinBox(min=0, max=5000, width=200, height=20) self.dspinbox.set_value(50) self.dialog.add_field_with_label('dspinbox', 'Spinbox', self.dspinbox) self.dslider = gui.Slider(10, 0, 100, 5, width=200, height=20) self.dspinbox.set_value(50) self.dialog.add_field_with_label('dslider', 'Slider', self.dslider) self.dcolor = gui.ColorPicker(width=200, height=20) self.dcolor.set_value('#ffff00') self.dialog.add_field_with_label('dcolor', 'Colour Picker', self.dcolor) self.ddate = gui.Date(width=200, height=20) self.ddate.set_value('2000-01-01') self.dialog.add_field_with_label('ddate', 'Date', self.ddate) self.dialog.confirm_dialog.do(self.dialog_confirm) self.dialog.show(self) def dialog_confirm(self, widget): result = self.dialog.get_field('dtextinput').get_value() self.txt.set_value(result) result = self.dialog.get_field('dcheck').get_value() self.check.set_value(result) result = self.dialog.get_field('ddropdown').get_value() self.dropDown.select_by_value(result) result = self.dialog.get_field('dspinbox').get_value() self.spin.set_value(result) result = self.dialog.get_field('dslider').get_value() self.slider.set_value(result) result = self.dialog.get_field('dcolor').get_value() self.colorPicker.set_value(result) result = self.dialog.get_field('ddate').get_value() self.date.set_value(result) result = self.dialog.get_field('dlistView').get_value() self.listView.select_by_value(result) # listener function def on_img_clicked(self, widget): self.lbl.set_text('Image clicked!') def on_table_row_click(self, table, row, item): self.lbl.set_text('Table Item clicked: ' + item.get_text()) def on_button_pressed(self, widget): self.lbl.set_text('Button pressed! ') self.bt.set_text('Hi!') def on_text_area_change(self, widget, newValue): self.lbl.set_text('Text Area value changed!') def on_spin_change(self, widget, newValue): self.lbl.set_text('SpinBox changed, new value: ' + str(newValue)) def on_check_change(self, widget, newValue): self.lbl.set_text('CheckBox changed, new value: ' + str(newValue)) def open_input_dialog(self, widget): self.inputDialog = gui.InputDialog('Input Dialog', 'Your name?', initial_value='type here', width=500) self.inputDialog.confirm_value.do( self.on_input_dialog_confirm) # here is returned the Input Dialog widget, and it will be shown self.inputDialog.show(self) def on_input_dialog_confirm(self, widget, value): self.lbl.set_text('Hello ' + value) def open_fileselection_dialog(self, widget): self.fileselectionDialog = gui.FileSelectionDialog('File Selection Dialog', 'Select files and folders', False, '.') self.fileselectionDialog.confirm_value.do( self.on_fileselection_dialog_confirm) # here is returned the Input Dialog widget, and it will be shown self.fileselectionDialog.show(self) def on_fileselection_dialog_confirm(self, widget, filelist): # a list() of filenames and folders is returned self.lbl.set_text('Selected files: %s' % ','.join(filelist)) if len(filelist): f = filelist[0] # replace the last download link fdownloader = gui.FileDownloader("download selected", f, width=200, height=30) self.subContainerRight.append(fdownloader, key='file_downloader') def list_view_on_selected(self, widget, selected_item_key): """ The selection event of the listView, returns a key of the clicked event. You can retrieve the item rapidly """ self.lbl.set_text('List selection: ' + self.listView.children[selected_item_key].get_text()) def drop_down_changed(self, widget, value): self.lbl.set_text('New Combo value: ' + value) def slider_changed(self, widget, value): self.lbl.set_text('New slider value: ' + str(value)) def color_picker_changed(self, widget, value): self.lbl.set_text('New color value: ' + value) def date_changed(self, widget, value): self.lbl.set_text('New date value: ' + value) def menu_save_clicked(self, widget): self.lbl.set_text('Menu clicked: Save') def menu_saveas_clicked(self, widget): self.lbl.set_text('Menu clicked: Save As') def menu_open_clicked(self, widget): self.lbl.set_text('Menu clicked: Open') def menu_view_clicked(self, widget): self.lbl.set_text('Menu clicked: View') def fileupload_on_success(self, widget, filename): self.lbl.set_text('File upload success: ' + filename) def fileupload_on_failed(self, widget, filename): self.lbl.set_text('File upload failed: ' + filename) def on_close(self): """ Overloading App.on_close event to stop the Timer. """ self.stop_flag = True super(MyApp, self).on_close() if __name__ == "__main__": # starts the webserver # optional parameters # start(MyApp,address='127.0.0.1', port=8081, multiple_instance=False,enable_file_cache=True, update_interval=0.1, start_browser=True) start(MyApp, debug=True, address='0.0.0.0', port=8081, start_browser=True, multiple_instance=True) 

可以直接复制存储运行，终端执行输出如下所示：

实例效果如下所示：

import time
import io
import traceback
import PIL.Image

import remi.gui as gui
from remi import start, App
import remi

class PILImageViewverWidget(gui.Image):
    def __init__(self, filename=None, kwargs):
        self.app_instance = None
        super(PILImageViewverWidget, self).__init__(“/res:logo.png”, kwargs)
        self.frame_index = 0
        self._buf = None
        if filename:
            self.load(filename)

    def load(self, file_path_name):
        pil_image = PIL.Image.open(file_path_name)
        self._buf = io.BytesIO()
        pil_image.save(self._buf, format=’png’)

        self.refresh()

    def search_app_instance(self, node):
        if issubclass(node.__class__, remi.server.App):
            return node
        if not hasattr(node, “get_parent”):
            return None
        return self.search_app_instance(node.get_parent()) 

    def refresh(self, *args):
        if self.app_instance==None:
            self.app_instance = self.search_app_instance(self)
            if self.app_instance==None:
                return
        self.frame_index = self.frame_index + 1
        self.app_instance.execute_javascript(“””
            url = ‘/%(id)s/get_image_data?index=%(frame_index)s’;
            
            xhr = null;
            xhr = new XMLHttpRequest();
            xhr.open(‘GET’, url, true);
            xhr.responseType = ‘blob’
            xhr.onload = function(e){

                urlCreator = window.URL || window.webkitURL;
                urlCreator.revokeObjectURL(document.getElementById(‘%(id)s’).src);
                imageUrl = urlCreator.createObjectURL(this.response);
                document.getElementById(‘%(id)s’).src = imageUrl;
            }
            xhr.send();
            “”” % {‘id’: id(self), ‘frame_index’:self.frame_index})

    def get_image_data(self, index=0):
        try:
            self._buf.seek(0)
            headers = {‘Content-type’: ‘image/png’}
            return [self._buf.read(), headers]
        except:
            print(traceback.format_exc())
        return None, None

class MyApp(App):
    def __init__(self, *args):
        super(MyApp, self).__init__(*args)

    def main(self, name=’world’):
        # the arguments are    width – height – layoutOrientationOrizontal
        self.mainContainer = gui.Container(width=640, height=270, margin=’0px auto’)
        self.mainContainer.style[‘text-align’] = ‘center’
        self.image_widget = PILImageViewverWidget(width=200, height=200)

        self.menu = gui.Menu(width=620, height=30)
        m1 = gui.MenuItem(‘File’, width=100, height=30)
        m11 = gui.MenuItem(‘Save’, width=100, height=30)
        m12 = gui.MenuItem(‘Open’, width=100, height=30)
        m12.onclick.do(self.menu_open_clicked)
        m111 = gui.MenuItem(‘Save’, width=100, height=30)
        m111.onclick.do(self.menu_save_clicked)
        m112 = gui.MenuItem(‘Save as’, width=100, height=30)
        m112.onclick.do(self.menu_saveas_clicked)

        self.menu.append(m1)
        m1.append(m11)
        m1.append(m12)
        m11.append(m111)
        m11.append(m112)

    def menu_open_clicked(self, widget):
        self.fileselectionDialog = gui.FileSelectionDialog(‘File Selection Dialog’, ‘Select an image file’, False, ‘.’)
        self.fileselectionDialog.confirm_value.do(
            self.on_image_file_selected)
        self.fileselectionDialog.cancel_dialog.do(
            self.on_dialog_cancel)
        # here is shown the dialog as root widget
        self.fileselectionDialog.show(self)

    def menu_save_clicked(self, widget):
        pass
        
    def menu_saveas_clicked(self, widget):
        pass
        
    def on_image_file_selected(self, widget, file_list):
        if len(file_list) < 1:
            return
        self.image_widget.load(file_list[0])
        self.set_root_widget(self.mainContainer)
    
    def on_dialog_cancel(self, widget):
        self.set_root_widget(self.mainContainer)

if __name__ == “__main__”:
    start(MyApp, address=’0.0.0.0′, port=0, start_browser=True)

官方项目中还提供了很多实例，感兴趣的话可以深入看下。

后续考虑如何将这套可视化项目与模型相结合打造出来非常好用的产品，感兴趣的话都可以尝试下！