Resize column width to fit into the QTableWidget pyqt

Resize column width to fit into the QTableWidget pyqt

In PyQt, you can resize column widths to fit the contents of a QTableWidget using the resizeColumnsToContents() method. This method adjusts the width of each column to fit the longest item in that column. Here's an example of how you can use it:

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTableWidget, QTableWidgetItem

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Resize Columns Example")
        self.setGeometry(100, 100, 500, 300)

        self.table_widget = QTableWidget(self)
        self.table_widget.setGeometry(50, 50, 400, 200)

        self.table_widget.setColumnCount(3)
        self.table_widget.setHorizontalHeaderLabels(["Name", "Age", "Country"])

        data = [
            ("Alice", "25", "USA"),
            ("Bob", "30", "Canada"),
            ("Charlie", "28", "UK")
        ]

        for row, (name, age, country) in enumerate(data):
            self.table_widget.insertRow(row)
            self.table_widget.setItem(row, 0, QTableWidgetItem(name))
            self.table_widget.setItem(row, 1, QTableWidgetItem(age))
            self.table_widget.setItem(row, 2, QTableWidgetItem(country))

        # Resize columns to fit contents
        self.table_widget.resizeColumnsToContents()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

In this example, we create a simple QTableWidget with three columns: "Name", "Age", and "Country". We populate the table with some data and then call resizeColumnsToContents() to automatically adjust the width of each column to accommodate the longest content in that column.

Keep in mind that while this method is convenient, it can sometimes lead to columns that are too wide, especially if the content is much longer in some cells than others. You might want to combine this with setting a maximum width for columns if you need more control over the appearance of your table.

Examples

  1. Automatically resize QTableWidget columns to content

    • To automatically resize the columns of a QTableWidget based on their content, use the resizeColumnsToContents method.
    pip install PyQt6

    from PyQt6.QtWidgets import QApplication, QTableWidget, QTableWidgetItem
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Add some data
table.setItem(0, 0, QTableWidgetItem("Hello"))
table.setItem(0, 1, QTableWidgetItem("World"))
table.setItem(0, 2, QTableWidgetItem("!"))

# Automatically resize columns
table.resizeColumnsToContents()

table.show()
sys.exit(app.exec())

  2. Set fixed column width in QTableWidget

    • To set a fixed width for each column, use the setColumnWidth method.
    from PyQt6.QtWidgets import QApplication, QTableWidget
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Set fixed width for columns
table.setColumnWidth(0, 100)  # Column 1 with 100px width
table.setColumnWidth(1, 150)  # Column 2 with 150px width
table.setColumnWidth(2, 200)  # Column 3 with 200px width

table.show()
sys.exit(app.exec())

  3. Resize QTableWidget columns to fit parent widget

    • To make columns automatically resize to fit the parent widget, set the resize mode to QHeaderView.Stretch.
    from PyQt6.QtWidgets import QApplication, QTableWidget, QHeaderView
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Set columns to stretch and fill the table
table.horizontalHeader().setSectionResizeMode(QHeaderView.SectionResizeMode.Stretch)

table.show()
sys.exit(app.exec())

  4. Set proportional column resizing in QTableWidget

    • To set different column resize modes, apply the appropriate SectionResizeMode to each column.
    from PyQt6.QtWidgets import QApplication, QTableWidget, QHeaderView
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Different resize modes for each column
table.horizontalHeader().setSectionResizeMode(0, QHeaderView.SectionResizeMode.Interactive)
table.horizontalHeader().setSectionResizeMode(1, QHeaderView.SectionResizeMode.Stretch)
table.horizontalHeader().setSectionResizeMode(2, QHeaderView.SectionResizeMode.Fixed)

table.setColumnWidth(2, 100)  # Fixed width for Column 3

table.show()
sys.exit(app.exec())

  5. Fit QTableWidget columns to content when resized

    • To automatically resize columns to fit content upon user resizing, connect the resizeEvent to a slot.
    from PyQt6.QtWidgets import QApplication, QTableWidget
import sys

class AutoResizeTable(QTableWidget):
    def resizeEvent(self, event):
        # Resize columns to fit content on resizing
        super().resizeEvent(event)
        self.resizeColumnsToContents()

app = QApplication(sys.argv)

table = AutoResizeTable(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Add sample data
table.setItem(0, 0, QTableWidgetItem("LongTextInColumnOne"))
table.setItem(0, 1, QTableWidgetItem("Short"))
table.setItem(0, 2, QTableWidgetItem("Average"))

table.show()
sys.exit(app.exec())

  6. Auto-resize QTableWidget columns with signals in PyQt

    • Connect signals to automatically resize columns based on content or parent widget resizing.
    from PyQt6.QtWidgets import QApplication, QTableWidget, QTableWidgetItem
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Add some data
table.setItem(0, 0, QTableWidgetItem("Hello"))
table.setItem(0, 1, QTableWidgetItem("World"))
table.setItem(0, 2, QTableWidgetItem("!"))

# Connect signals for auto-resizing
table.horizontalHeader().sectionResized.connect(lambda: table.resizeColumnsToContents())
table.show()

sys.exit(app.exec())

  7. Set custom resize mode in QTableWidget

    • Customize the resize behavior for specific columns in a QTableWidget.
    from PyQt6.QtWidgets import QApplication, QTableWidget, QHeaderView
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Set custom resize modes for columns
table.horizontalHeader().setSectionResizeMode(0, QHeaderView.SectionResizeMode.ResizeToContents)
table.horizontalHeader().setSectionResizeMode(1, QHeaderView.SectionResizeMode.Stretch)
table.horizontalHeader().setSectionResizeMode(2, QHeaderView.SectionResizeMode.Interactive)

table.show()
sys.exit(app.exec())

  8. Set minimum and maximum column widths in QTableWidget

    • To control the minimum and maximum widths of columns, use the setMinimumSectionSize and setMaximumSectionSize methods.
    from PyQt6.QtWidgets import QApplication, QTableWidget, QHeaderView
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Set minimum and maximum widths for columns
table.horizontalHeader().setMinimumSectionSize(50)  # Min width for all columns
table.horizontalHeader().setMaximumSectionSize(200)  # Max width for all columns

table.show()
sys.exit(app.exec())

  9. Resize QTableWidget columns to equal widths

    • To ensure all columns have equal widths, calculate the width based on the table's width and the number of columns.
    from PyQt6.QtWidgets import QApplication, QTableWidget
import sys

app = QApplication(sys.argv)

table = QTableWidget(3, 3)  # 3x3 table
table.setHorizontalHeaderLabels(["Column 1", "Column 2", "Column 3"])

# Ensure all columns have equal widths
total_width = 300  # Example total width
num_columns = 3
column_width = total_width // num_columns  # Equal width for each column

for i in range(num_columns):
    table.setColumnWidth(i, column_width)

table.show()
sys.exit(app.exec())

  10. Manually adjust column width in QTableWidget based on content

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