Add Open/Save mode to the file selection dialogfile-selection

This patch adds the option to set a FileSelectionMode, either Open or
Save.  Not all backends might support this – currently, only zenity and
kdialog do.  Per default, the Open mode is used (as before).

1 files changed, 9 insertions, 1 deletions

diff --git a/examples/file_selection.rs b/examples/file_selection.rs
index 5436742..5d2d860 100644
--- a/examples/file_selection.rs
+++ b/examples/file_selection.rs
@@ -5,9 +5,17 @@ use dialog::DialogBox;
 
 fn main() -> dialog::Result<()> {
     let choice = dialog::FileSelection::new("Please select a file")
-        .title("File Chooser Example")
+        .title("File Chooser Example (Open)")
         .path("/etc")
         .show()?;
     println!("The user chose: {:?}", choice);
+
+    let choice = dialog::FileSelection::new("Please select a file")
+        .title("File Chooser Example (Save)")
+        .mode(dialog::FileSelectionMode::Save)
+        .path("/etc")
+        .show()?;
+    println!("The user chose: {:?}", choice);
+
     Ok(())
 }