kdialog: add page (#8071)

pages/linux/kdialog.md

@@ -0,0 +1,36 @@
+# kdialog
+
+> Show KDE dialog boxes from within shell scripts.
+> More information: <https://develop.kde.org/deploy/kdialog/>.
+
+- Open a dialog box displaying a specific message:
+
+`kdialog --msgbox "{{message}}" "{{optional_detailed_message}}"`
+
+- Open a question dialog with a `yes` and `no` button, returning `0` and `1`, respectively:
+
+`kdialog --yesno "{{message}}"`
+
+- Open a warning dialog with a `yes`, `no`, and `cancel` button, returning `0`, `1`, or `2` respectively:
+
+`kdialog --warningyesnocancel "{{message}}"`
+
+- Open an input dialog box and print the input to stdout when `OK` is pressed:
+
+`kdialog --inputbox "{{message}}" "{{optional_default_text}}"`
+
+- Open a dialog to prompt for a specific password and print it to stdout:
+
+`kdialog --password "{{message}}"`
+
+- Open a dialog containing a specific dropdown menu and print the selected item to stdout:
+
+`kdialog --combobx "{{message}}" "{{item1}}" "{{item2}}" "{{...}}"`
+
+- Open a file chooser dialog and print the selected file's path to stdout:
+
+`kdialog --getopenfilename`
+
+- Open a progressbar dialog and print a DBUS reference for communication to stdout:
+
+`kdialog --progressbar "{{message}}"`