如果C＃中的窗口大小发生变化，如何调用方法

Question

While I know a bit about event handlers, but not really enough about how to impement them.

So the question is: How can I call my method

redrawWidgets();

without manually checking everytime if the main window changed size?

Note that I did not use XAML and instead coded the GUI by hand, since that how I stupidally started this project. The next one I will definetly do with XAML.

My mainWindow looks as follows:

using AlgorithmComparer.src.View.Main;
using System.Windows;
using AlgorithmComparer.src.Model;
using System.Collections.Generic;
using System;
using System.Windows.Threading;

namespace AlgorithmComparer.src.View
{
    public class MainWindow : Window, IView
    {
        ControllerClass _controller;

        private AlgorithmRuntimeView _leftAlgorithmRuntimeView;
        private AlgorithmRuntimeView _rightAlgorithmRuntimeView;
        public MainWindow(ControllerClass controller, AlgorithmRuntimeView leftAlgorithmRuntimeView, AlgorithmRuntimeView rightAlgorithmRuntimeView)
        {
            this._leftAlgorithmRuntimeView = leftAlgorithmRuntimeView;
            this._rightAlgorithmRuntimeView = rightAlgorithmRuntimeView;
            this._controller = controller;
            Title = "Algorithm Comparer";
            Height = 530;
            Width = 800;
            InitLayout();
        }

        public void InitLayout()
        {
            Content = new MainView(_controller, _leftAlgorithmRuntimeView, _rightAlgorithmRuntimeView);
        }

        public int[] getWindowSize()
        {
            return (new int[2] { (int)this.ActualHeight, (int)this.ActualWidth });
        }
    }
}

Answer 1

You dont need to invoce this method yourself. The Windowclass already offers you this functionallity with the SizeChanged event. You can use this bit of code to make use of it:

    YourWindow.SizeChanged += functionName;
    //If you are in your code behind use:
    //this.SizeChanged += functionName;

    private void functionName(object sender, SizeChangedEventArgs e)
    {
        //do what you want to do if size changed 
    }

Answer 2

In your window's constructor, you can hook up to the SizeChanged event:

SizeChanged += window_SizeChanged;

You'll get a handler method that you can make your call in. Be warned: this will fire very rapidly whenever the size changes, as it is changing, and for any reason it changes. It'll fire at launch as the window is first being sized, for instance. On minimize, maximize, edge drag...everything.