issue in opacity of the parent form and panel

Question

Hi ,

my other problem is there is a scenario in which i have a form named child which is opened inside a panel of a form named father . what i am trying is when i press F2 on my keyboard a new form opens asking for current date . at this moment i want to blur the parent form as well as the child form so that until the date form is closed , the user cannot do anything except to close the date form first .in other words the previous form controls should be blocked until i close the date form . Any suggestion would be much grateful .

Answer 1

prepared two types. Press F2 or F3 to see it working.

using System;
using System.Drawing;
using System.Windows.Forms;

public partial class Father : Form
{
    public Father() {
        InitializeComponent();
    }

    protected override void OnShown(EventArgs e) {
        base.OnShown(e);
        TransparencyKey = Color.Magenta;
    }

    protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
        if (keyData == (Keys.F2)) {
            BeginInvoke((Action)ShowDateForm1);
            return true;
        }
        if (keyData == (Keys.F3)) {
            BeginInvoke((Action)ShowDateForm2);
            return true;
        }
        return base.ProcessCmdKey(ref msg, keyData);
    }

    private void ShowDateForm1() {
        Opacity = 0.5d;
        using (var dateForm = new DateForm()) {
            dateForm.ShowDialog();
        }
        Opacity = 1.0d;
    }

    Color panelBackColor;
    Color formBackColor;

    private void ShowDateForm2() {
        // save BacColor
        formBackColor = BackColor;
        panelBackColor = FatherPanel.BackColor;
        // make transparent
        BackColor = TransparencyKey;
        FatherPanel.BackColor = TransparencyKey;
        FatherPanel.Enabled = false;
        // Open DateForm
        var dateForm = new DateForm();
        dateForm.FormClosed += DateForm_FormClosed;
        dateForm.Show();
    }

    private void DateForm_FormClosed(object sender,
                                    FormClosedEventArgs e) {
        // restore BacColor
        BackColor = formBackColor;
        FatherPanel.BackColor = panelBackColor;
        FatherPanel.Enabled = true;
        // activate
        Activate();
    }
}