pyqt5中文件的动态高亮
Dynamic highlighting of files in pyqt5
我正在尝试制作一种图像文件浏览器
当我按下一个按钮或上一个按钮时，它会打开图像并显示上述目录中的文件列表。但是，它只能通过鼠标单击来突出显示列表视图中的文件。
如何在按下按钮（下一个或上一个）时突出显示列表视图区域（左侧）中的当前文件？
这是我的代码：
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import QColor,QTextCharFormat
import os
class Ui_Dialog(object):
def setupUi(self, Dialog):
self.filename=[]
self.path=[]
self.current_im=[]
Dialog.setObjectName("Dialog")
Dialog.resize(832, 586)
self.toolButton = QtWidgets.QToolButton(Dialog)
self.toolButton.setGeometry(QtCore.QRect(90, 70, 25, 19))
self.toolButton.setPopupMode(QtWidgets.QToolButton.DelayedPopup)
self.toolButton.setObjectName("toolButton")
self.label = QtWidgets.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(20, 70, 81, 16))
self.label.setObjectName("label")
#self.lbl = QLabel(self)
self.qle = QLineEdit(Dialog)
self.qle.setGeometry(QtCore.QRect(120, 20, 191, 16))
self.t=self.qle.textChanged[str]
self.qle.textChanged[str].connect(self.onChanged)
#self.lbl.move(60, 40)
self.label_2 = QtWidgets.QLabel(Dialog)
self.label_2.setGeometry(QtCore.QRect(10, 20, 91, 16))
self.label_2.setObjectName("label_2")
self.toolButton_2 = QtWidgets.QToolButton(Dialog)
self.toolButton_2.setGeometry(QtCore.QRect(500, 20, 31, 19))
self.toolButton_2.setObjectName("toolButton_2")
self.checkBox = QtWidgets.QCheckBox(Dialog)
self.checkBox.setGeometry(QtCore.QRect(730, 260, 91, 21))
self.checkBox.setObjectName("checkBox")
#self.scrollArea = QtWidgets.QScrollArea(Dialog)
#self.scrollArea.setGeometry(QtCore.QRect(10, 110, 261, 461))
#self.scrollArea.setWidgetResizable(True)
#self.scrollArea.setObjectName("scrollArea")
#self.scrollAreaWidgetContents = Widget(Dialog)
#self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(10, 110, 261, 461))
#self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
#self.verticalScrollBar = QtWidgets.QScrollBar(self.scrollAreaWidgetContents)
#self.verticalScrollBar.setGeometry(QtCore.QRect(240, 0, 16, 451))
#self.verticalScrollBar.setOrientation(QtCore.Qt.Vertical)
#self.verticalScrollBar.setObjectName("verticalScrollBar")
#self.scrollArea.setWidget(self.scrollAreaWidgetContents)
#self.hlay = QHBoxLayout(Dialog)
self.listview = QListView(Dialog)
self.fileModel = QFileSystemModel(Dialog)
#self.hlay.addWidget(self.listview)
#self.hlay.setGeometry(QtCore.QRect(10, 110, 261, 461))
self.listview.setGeometry(QtCore.QRect(10, 110, 261, 461))
self.label_3 = QtWidgets.QLabel(Dialog)
self.label_3.setGeometry(QtCore.QRect(290, 140, 401, 361))
self.label_3.setText("")
#self.label_3.setPixmap(QtGui.QPixmap("C:/Users/Nigel/Desktop/Waste_classification/Waste-Classification-master/dataset/train_set/1/2а (5).jpg"))
#self.label_3.setScaledContents(True)
self.label_3.setObjectName("label_3")
self.comboBox = QtWidgets.QComboBox(Dialog)
self.comboBox.setGeometry(QtCore.QRect(720, 140, 69, 22))
self.comboBox.setObjectName("comboBox")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.label_4 = QtWidgets.QLabel(Dialog)
self.label_4.setGeometry(QtCore.QRect(720, 120, 51, 16))
self.label_4.setObjectName("label_4")
self.label_5 = QtWidgets.QLabel(Dialog)
self.label_5.setGeometry(QtCore.QRect(390, 20, 91, 16))
self.label_5.setObjectName("label_5")
self.comboBox_2 = QtWidgets.QComboBox(Dialog)
self.comboBox_2.setGeometry(QtCore.QRect(720, 210, 81, 22))
self.comboBox_2.setObjectName("comboBox_2")
self.comboBox_2.addItem("")
self.comboBox_2.addItem("")
self.comboBox_2.addItem("")
self.label_6 = QtWidgets.QLabel(Dialog)
self.label_6.setGeometry(QtCore.QRect(720, 190, 47, 13))
self.label_6.setObjectName("label_6")
self.pushButton = QtWidgets.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(290, 510, 81, 41))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(Dialog)
self.pushButton_2.setGeometry(QtCore.QRect(380, 510, 81, 41))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_3 = QtWidgets.QPushButton(Dialog)
self.pushButton_3.setGeometry(QtCore.QRect(470, 510, 81, 41))
self.pushButton_3.setObjectName("pushButton_3")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def onChanged(self, text):
DB=text+'.csv'
print()
#self.lbl.adjustSize()-
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.toolButton.setText(_translate("Dialog", "..."))
self.label.setText(_translate("Dialog", "Images folder"))
self.label_2.setText(_translate("Dialog", "Database filename:"))
self.toolButton_2.setText(_translate("Dialog", "..."))
self.checkBox.setText(_translate("Dialog", "Show Grid"))
self.comboBox.setItemText(0, _translate("Dialog", "1A"))
self.comboBox.setItemText(1, _translate("Dialog", "2A"))
self.comboBox.setItemText(2, _translate("Dialog", "3A"))
self.comboBox.setItemText(3, _translate("Dialog", "5A"))
self.comboBox.setItemText(4, _translate("Dialog", "12A"))
self.comboBox.setItemText(5, _translate("Dialog", "17A"))
self.comboBox.setItemText(6, _translate("Dialog", "19A"))
self.comboBox.setItemText(7, _translate("Dialog", "20A"))
self.comboBox.setItemText(8, _translate("Dialog", "22A"))
self.comboBox.setItemText(9, _translate("Dialog", "Unsorted"))
self.label_4.setText(_translate("Dialog", "Class:"))
#self.label_4.setBackground(QColor('yellow'))
self.label_5.setText(_translate("Dialog", "Database location:"))
self.comboBox_2.setItemText(0, _translate("Dialog", "600x500"))
self.comboBox_2.setItemText(1, _translate("Dialog", "800x500"))
self.comboBox_2.setItemText(2, _translate("Dialog", "1500x500"))
self.label_6.setText(_translate("Dialog", "Grid size:"))
self.pushButton.setText(_translate("Dialog", "Previous"))
self.pushButton_2.setText(_translate("Dialog", "Next"))
self.pushButton_3.setText(_translate("Dialog", "Add to DB"))
self.toolButton.clicked.connect(self.open_dialog_box)
self.pushButton_2.clicked.connect(self.next_im)
self.pushButton.clicked.connect(self.previous_im)
#self.toolButton.clicked.connect()
#self.toolButton_2.clicked.connect(self.open_dialog_box)
def open_dialog_box(self):
self.filename=QFileDialog.getExistingDirectory()
self.fileModel.setRootPath(self.filename)
self.listview.setModel(self.fileModel)
self.listview.setRootIndex(self.fileModel.index(self.filename))
#selection_model = self.listview.selectionModel()
#index = self.fileModel.index(0, 0)
#print(index)
#selection_model.select(index, QtGui.QItemSelectionModel.Select)
self.listview.clicked.connect(self.on_clicked)
def on_clicked(self, index):
#index = self.fileModel.index(0,0)
#print(index)
self.path = self.fileModel.fileInfo(index).absoluteFilePath()
print(index)
self.label_3.setPixmap(QtGui.QPixmap(self.path))
self.label_3.setScaledContents(True)
self.current_im=self.path
def on_clicked_1(self):
self.path = self.current_im
#print(path)
self.label_3.setPixmap(QtGui.QPixmap(self.path))
self.label_3.setScaledContents(True)
def next_im(self):
directory=self.filename
list_1=[]
if directory==[] or self.current_im==[]:
pass
else:
for f in os.listdir(directory):
fpath = directory+'/'+f
list_1.append(fpath)
#print(list_1)
n=list_1.index(self.current_im)
if n==(len(list_1)-1):
k=0
else:
k=n+1
self.current_im=list_1[k]
self.on_clicked_1()
#self.label_3.setPixmap(QtGui.QPixmap(self.current_im))
#self.label_3.setScaledContents(True)
def previous_im(self):
directory=self.filename
list_1=[]
if directory==[] or self.current_im==[]:
pass
else:
for f in os.listdir(directory):
fpath = directory+'/'+f
list_1.append(fpath)
#print(list_1)
n=list_1.index(self.current_im)
self.current_im=list_1[n-1]
self.label_3.setPixmap(QtGui.QPixmap(self.current_im))
self.label_3.setScaledContents(True)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
#w = Widget()
#w.show()
sys.exit(app.exec_())
首先，您不应该修改 Qt Designer 生成的代码，所以我花时间创建了。ui，我还使用布局来更好地处理几何图形。
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Dialog</class>
<widget class="QDialog" name="Dialog">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>724</width>
<height>463</height>
</rect>
</property>
<property name="windowTitle">
<string>Dialog</string>
</property>
<layout class="QGridLayout" name="gridLayout" rowstretch="0,0,1,0" columnstretch="1,0,0">
<item row="0" column="0" colspan="3">
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QLabel" name="label">
<property name="text">
<string>Database filename:</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="lineEdit"/>
</item>
<item>
<widget class="QLabel" name="label_2">
<property name="text">
<string>Database location:</string>
</property>
</widget>
</item>
<item>
<widget class="QToolButton" name="toolButton_2">
<property name="text">
<string>...</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_3">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="1" column="0">
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QLabel" name="label_3">
<property name="text">
<string>Images folder</string>
</property>
</widget>
</item>
<item>
<widget class="QToolButton" name="select_folder_button">
<property name="text">
<string>...</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="1" column="1">
<spacer name="verticalSpacer_2">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>28</height>
</size>
</property>
</spacer>
</item>
<item row="1" column="2">
<spacer name="verticalSpacer_3">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>28</height>
</size>
</property>
</spacer>
</item>
<item row="2" column="0">
<widget class="QListView" name="listview"/>
</item>
<item row="2" column="1">
<widget class="QLabel" name="image_label">
<property name="styleSheet">
<string notr="true">background-color: rgb(255, 255, 255);</string>
</property>
<property name="text">
<string/>
</property>
<property name="scaledContents">
<bool>true</bool>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</item>
<item row="2" column="2">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QLabel" name="label_5">
<property name="text">
<string>Class:</string>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox"/>
</item>
<item>
<widget class="QLabel" name="label_6">
<property name="text">
<string>Grid Size</string>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox_2"/>
</item>
<item>
<widget class="QCheckBox" name="checkBox">
<property name="text">
<string>Show Grid</string>
</property>
</widget>
</item>
<item>
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="3" column="0">
<spacer name="verticalSpacer_6">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>39</height>
</size>
</property>
</spacer>
</item>
<item row="3" column="1">
<layout class="QHBoxLayout" name="horizontalLayout_2">
<item>
<widget class="QPushButton" name="previous_button">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Previous</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="next_button">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Next</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_3">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Add to DB</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_2">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="3" column="2">
<spacer name="verticalSpacer_5">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>39</height>
</size>
</property>
</spacer>
</item>
</layout>
</widget>
<resources/>
<connections/>
</ui>
您必须将 .ui 转换为 .py:
pyuic5 gui.ui -o gui.py -x
现在的问题是，逻辑是将图像更改过程集中在一个方法中，因为在这种情况下，一切都集中在与 QModelIndex 关联的项目的选择上，所以每次选择的项目发生变化时，图片必须更新，按钮只会改变选中的项目：
from PyQt5 import QtCore, QtGui, QtWidgets
from gui import Ui_Dialog
class Dialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
self.filemodel = QtWidgets.QFileSystemModel(self)
self.listview.setModel(self.filemodel)
self.select_folder_button.clicked.connect(self.select_folder)
self.listview.selectionModel().currentChanged.connect(self.update_image)
self.next_button.clicked.connect(self.next_image)
self.previous_button.clicked.connect(self.previous_image)
self.image_label.setFixedSize(400, 360)
@QtCore.pyqtSlot()
def select_folder(self):
dirname = QtWidgets.QFileDialog.getExistingDirectory()
if dirname:
self.filemodel.setRootPath(dirname)
self.listview.setRootIndex(self.filemodel.index(dirname))
@QtCore.pyqtSlot()
def next_image(self):
index = self.listview.moveCursor(
QtWidgets.QAbstractItemView.MoveNext, QtCore.Qt.NoModifier
)
self.listview.selectionModel().setCurrentIndex(
index, QtCore.QItemSelectionModel.SelectCurrent
)
@QtCore.pyqtSlot()
def previous_image(self):
index = self.listview.moveCursor(
QtWidgets.QAbstractItemView.MovePrevious, QtCore.Qt.NoModifier
)
self.listview.selectionModel().setCurrentIndex(
index, QtCore.QItemSelectionModel.SelectCurrent
)
def update_image(self, index):
fileinfo = self.filemodel.fileInfo(index)
if fileinfo and fileinfo.isFile():
filename = fileinfo.absoluteFilePath()
self.image_label.setPixmap(QtGui.QPixmap(filename))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Dialog()
w.show()
sys.exit(app.exec_())
我正在尝试制作一种图像文件浏览器
当我按下一个按钮或上一个按钮时，它会打开图像并显示上述目录中的文件列表。但是，它只能通过鼠标单击来突出显示列表视图中的文件。
如何在按下按钮（下一个或上一个）时突出显示列表视图区域（左侧）中的当前文件？
这是我的代码：
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import QColor,QTextCharFormat
import os
class Ui_Dialog(object):
def setupUi(self, Dialog):
self.filename=[]
self.path=[]
self.current_im=[]
Dialog.setObjectName("Dialog")
Dialog.resize(832, 586)
self.toolButton = QtWidgets.QToolButton(Dialog)
self.toolButton.setGeometry(QtCore.QRect(90, 70, 25, 19))
self.toolButton.setPopupMode(QtWidgets.QToolButton.DelayedPopup)
self.toolButton.setObjectName("toolButton")
self.label = QtWidgets.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(20, 70, 81, 16))
self.label.setObjectName("label")
#self.lbl = QLabel(self)
self.qle = QLineEdit(Dialog)
self.qle.setGeometry(QtCore.QRect(120, 20, 191, 16))
self.t=self.qle.textChanged[str]
self.qle.textChanged[str].connect(self.onChanged)
#self.lbl.move(60, 40)
self.label_2 = QtWidgets.QLabel(Dialog)
self.label_2.setGeometry(QtCore.QRect(10, 20, 91, 16))
self.label_2.setObjectName("label_2")
self.toolButton_2 = QtWidgets.QToolButton(Dialog)
self.toolButton_2.setGeometry(QtCore.QRect(500, 20, 31, 19))
self.toolButton_2.setObjectName("toolButton_2")
self.checkBox = QtWidgets.QCheckBox(Dialog)
self.checkBox.setGeometry(QtCore.QRect(730, 260, 91, 21))
self.checkBox.setObjectName("checkBox")
#self.scrollArea = QtWidgets.QScrollArea(Dialog)
#self.scrollArea.setGeometry(QtCore.QRect(10, 110, 261, 461))
#self.scrollArea.setWidgetResizable(True)
#self.scrollArea.setObjectName("scrollArea")
#self.scrollAreaWidgetContents = Widget(Dialog)
#self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(10, 110, 261, 461))
#self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
#self.verticalScrollBar = QtWidgets.QScrollBar(self.scrollAreaWidgetContents)
#self.verticalScrollBar.setGeometry(QtCore.QRect(240, 0, 16, 451))
#self.verticalScrollBar.setOrientation(QtCore.Qt.Vertical)
#self.verticalScrollBar.setObjectName("verticalScrollBar")
#self.scrollArea.setWidget(self.scrollAreaWidgetContents)
#self.hlay = QHBoxLayout(Dialog)
self.listview = QListView(Dialog)
self.fileModel = QFileSystemModel(Dialog)
#self.hlay.addWidget(self.listview)
#self.hlay.setGeometry(QtCore.QRect(10, 110, 261, 461))
self.listview.setGeometry(QtCore.QRect(10, 110, 261, 461))
self.label_3 = QtWidgets.QLabel(Dialog)
self.label_3.setGeometry(QtCore.QRect(290, 140, 401, 361))
self.label_3.setText("")
#self.label_3.setPixmap(QtGui.QPixmap("C:/Users/Nigel/Desktop/Waste_classification/Waste-Classification-master/dataset/train_set/1/2а (5).jpg"))
#self.label_3.setScaledContents(True)
self.label_3.setObjectName("label_3")
self.comboBox = QtWidgets.QComboBox(Dialog)
self.comboBox.setGeometry(QtCore.QRect(720, 140, 69, 22))
self.comboBox.setObjectName("comboBox")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.label_4 = QtWidgets.QLabel(Dialog)
self.label_4.setGeometry(QtCore.QRect(720, 120, 51, 16))
self.label_4.setObjectName("label_4")
self.label_5 = QtWidgets.QLabel(Dialog)
self.label_5.setGeometry(QtCore.QRect(390, 20, 91, 16))
self.label_5.setObjectName("label_5")
self.comboBox_2 = QtWidgets.QComboBox(Dialog)
self.comboBox_2.setGeometry(QtCore.QRect(720, 210, 81, 22))
self.comboBox_2.setObjectName("comboBox_2")
self.comboBox_2.addItem("")
self.comboBox_2.addItem("")
self.comboBox_2.addItem("")
self.label_6 = QtWidgets.QLabel(Dialog)
self.label_6.setGeometry(QtCore.QRect(720, 190, 47, 13))
self.label_6.setObjectName("label_6")
self.pushButton = QtWidgets.QPushButton(Dialog)
self.pushButton.setGeometry(QtCore.QRect(290, 510, 81, 41))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(Dialog)
self.pushButton_2.setGeometry(QtCore.QRect(380, 510, 81, 41))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_3 = QtWidgets.QPushButton(Dialog)
self.pushButton_3.setGeometry(QtCore.QRect(470, 510, 81, 41))
self.pushButton_3.setObjectName("pushButton_3")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def onChanged(self, text):
DB=text+'.csv'
print()
#self.lbl.adjustSize()-
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.toolButton.setText(_translate("Dialog", "..."))
self.label.setText(_translate("Dialog", "Images folder"))
self.label_2.setText(_translate("Dialog", "Database filename:"))
self.toolButton_2.setText(_translate("Dialog", "..."))
self.checkBox.setText(_translate("Dialog", "Show Grid"))
self.comboBox.setItemText(0, _translate("Dialog", "1A"))
self.comboBox.setItemText(1, _translate("Dialog", "2A"))
self.comboBox.setItemText(2, _translate("Dialog", "3A"))
self.comboBox.setItemText(3, _translate("Dialog", "5A"))
self.comboBox.setItemText(4, _translate("Dialog", "12A"))
self.comboBox.setItemText(5, _translate("Dialog", "17A"))
self.comboBox.setItemText(6, _translate("Dialog", "19A"))
self.comboBox.setItemText(7, _translate("Dialog", "20A"))
self.comboBox.setItemText(8, _translate("Dialog", "22A"))
self.comboBox.setItemText(9, _translate("Dialog", "Unsorted"))
self.label_4.setText(_translate("Dialog", "Class:"))
#self.label_4.setBackground(QColor('yellow'))
self.label_5.setText(_translate("Dialog", "Database location:"))
self.comboBox_2.setItemText(0, _translate("Dialog", "600x500"))
self.comboBox_2.setItemText(1, _translate("Dialog", "800x500"))
self.comboBox_2.setItemText(2, _translate("Dialog", "1500x500"))
self.label_6.setText(_translate("Dialog", "Grid size:"))
self.pushButton.setText(_translate("Dialog", "Previous"))
self.pushButton_2.setText(_translate("Dialog", "Next"))
self.pushButton_3.setText(_translate("Dialog", "Add to DB"))
self.toolButton.clicked.connect(self.open_dialog_box)
self.pushButton_2.clicked.connect(self.next_im)
self.pushButton.clicked.connect(self.previous_im)
#self.toolButton.clicked.connect()
#self.toolButton_2.clicked.connect(self.open_dialog_box)
def open_dialog_box(self):
self.filename=QFileDialog.getExistingDirectory()
self.fileModel.setRootPath(self.filename)
self.listview.setModel(self.fileModel)
self.listview.setRootIndex(self.fileModel.index(self.filename))
#selection_model = self.listview.selectionModel()
#index = self.fileModel.index(0, 0)
#print(index)
#selection_model.select(index, QtGui.QItemSelectionModel.Select)
self.listview.clicked.connect(self.on_clicked)
def on_clicked(self, index):
#index = self.fileModel.index(0,0)
#print(index)
self.path = self.fileModel.fileInfo(index).absoluteFilePath()
print(index)
self.label_3.setPixmap(QtGui.QPixmap(self.path))
self.label_3.setScaledContents(True)
self.current_im=self.path
def on_clicked_1(self):
self.path = self.current_im
#print(path)
self.label_3.setPixmap(QtGui.QPixmap(self.path))
self.label_3.setScaledContents(True)
def next_im(self):
directory=self.filename
list_1=[]
if directory==[] or self.current_im==[]:
pass
else:
for f in os.listdir(directory):
fpath = directory+'/'+f
list_1.append(fpath)
#print(list_1)
n=list_1.index(self.current_im)
if n==(len(list_1)-1):
k=0
else:
k=n+1
self.current_im=list_1[k]
self.on_clicked_1()
#self.label_3.setPixmap(QtGui.QPixmap(self.current_im))
#self.label_3.setScaledContents(True)
def previous_im(self):
directory=self.filename
list_1=[]
if directory==[] or self.current_im==[]:
pass
else:
for f in os.listdir(directory):
fpath = directory+'/'+f
list_1.append(fpath)
#print(list_1)
n=list_1.index(self.current_im)
self.current_im=list_1[n-1]
self.label_3.setPixmap(QtGui.QPixmap(self.current_im))
self.label_3.setScaledContents(True)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
#w = Widget()
#w.show()
sys.exit(app.exec_())
首先，您不应该修改 Qt Designer 生成的代码，所以我花时间创建了。ui，我还使用布局来更好地处理几何图形。
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Dialog</class>
<widget class="QDialog" name="Dialog">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>724</width>
<height>463</height>
</rect>
</property>
<property name="windowTitle">
<string>Dialog</string>
</property>
<layout class="QGridLayout" name="gridLayout" rowstretch="0,0,1,0" columnstretch="1,0,0">
<item row="0" column="0" colspan="3">
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QLabel" name="label">
<property name="text">
<string>Database filename:</string>
</property>
</widget>
</item>
<item>
<widget class="QLineEdit" name="lineEdit"/>
</item>
<item>
<widget class="QLabel" name="label_2">
<property name="text">
<string>Database location:</string>
</property>
</widget>
</item>
<item>
<widget class="QToolButton" name="toolButton_2">
<property name="text">
<string>...</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_3">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="1" column="0">
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QLabel" name="label_3">
<property name="text">
<string>Images folder</string>
</property>
</widget>
</item>
<item>
<widget class="QToolButton" name="select_folder_button">
<property name="text">
<string>...</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="1" column="1">
<spacer name="verticalSpacer_2">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>28</height>
</size>
</property>
</spacer>
</item>
<item row="1" column="2">
<spacer name="verticalSpacer_3">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>28</height>
</size>
</property>
</spacer>
</item>
<item row="2" column="0">
<widget class="QListView" name="listview"/>
</item>
<item row="2" column="1">
<widget class="QLabel" name="image_label">
<property name="styleSheet">
<string notr="true">background-color: rgb(255, 255, 255);</string>
</property>
<property name="text">
<string/>
</property>
<property name="scaledContents">
<bool>true</bool>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</item>
<item row="2" column="2">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QLabel" name="label_5">
<property name="text">
<string>Class:</string>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox"/>
</item>
<item>
<widget class="QLabel" name="label_6">
<property name="text">
<string>Grid Size</string>
</property>
</widget>
</item>
<item>
<widget class="QComboBox" name="comboBox_2"/>
</item>
<item>
<widget class="QCheckBox" name="checkBox">
<property name="text">
<string>Show Grid</string>
</property>
</widget>
</item>
<item>
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="3" column="0">
<spacer name="verticalSpacer_6">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>39</height>
</size>
</property>
</spacer>
</item>
<item row="3" column="1">
<layout class="QHBoxLayout" name="horizontalLayout_2">
<item>
<widget class="QPushButton" name="previous_button">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Previous</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="next_button">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Next</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_3">
<property name="minimumSize">
<size>
<width>80</width>
<height>40</height>
</size>
</property>
<property name="text">
<string>Add to DB</string>
</property>
</widget>
</item>
<item>
<spacer name="horizontalSpacer_2">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>40</width>
<height>20</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
<item row="3" column="2">
<spacer name="verticalSpacer_5">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>39</height>
</size>
</property>
</spacer>
</item>
</layout>
</widget>
<resources/>
<connections/>
</ui>
您必须将 .ui 转换为 .py:
pyuic5 gui.ui -o gui.py -x
现在的问题是，逻辑是将图像更改过程集中在一个方法中，因为在这种情况下，一切都集中在与 QModelIndex 关联的项目的选择上，所以每次选择的项目发生变化时，图片必须更新，按钮只会改变选中的项目：
from PyQt5 import QtCore, QtGui, QtWidgets
from gui import Ui_Dialog
class Dialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
self.filemodel = QtWidgets.QFileSystemModel(self)
self.listview.setModel(self.filemodel)
self.select_folder_button.clicked.connect(self.select_folder)
self.listview.selectionModel().currentChanged.connect(self.update_image)
self.next_button.clicked.connect(self.next_image)
self.previous_button.clicked.connect(self.previous_image)
self.image_label.setFixedSize(400, 360)
@QtCore.pyqtSlot()
def select_folder(self):
dirname = QtWidgets.QFileDialog.getExistingDirectory()
if dirname:
self.filemodel.setRootPath(dirname)
self.listview.setRootIndex(self.filemodel.index(dirname))
@QtCore.pyqtSlot()
def next_image(self):
index = self.listview.moveCursor(
QtWidgets.QAbstractItemView.MoveNext, QtCore.Qt.NoModifier
)
self.listview.selectionModel().setCurrentIndex(
index, QtCore.QItemSelectionModel.SelectCurrent
)
@QtCore.pyqtSlot()
def previous_image(self):
index = self.listview.moveCursor(
QtWidgets.QAbstractItemView.MovePrevious, QtCore.Qt.NoModifier
)
self.listview.selectionModel().setCurrentIndex(
index, QtCore.QItemSelectionModel.SelectCurrent
)
def update_image(self, index):
fileinfo = self.filemodel.fileInfo(index)
if fileinfo and fileinfo.isFile():
filename = fileinfo.absoluteFilePath()
self.image_label.setPixmap(QtGui.QPixmap(filename))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Dialog()
w.show()
sys.exit(app.exec_())