Resizable and movable option (#15)

* Add FileDialog::resizable

* Add FileDialog::movable

* Update CHANGELOG.md

CHANGELOG.md

@@ -7,6 +7,8 @@
 ### ✨ Features
 - Added `FileDialog::anchor` to overwrite the window anchor [#11](https://github.com/fluxxcode/egui-file-dialog/pull/11)
 - Added `FileDialog::title` to overwrite the window title [#12](https://github.com/fluxxcode/egui-file-dialog/pull/12)
+- Added `FileDialog::resizable` to set if the window is resizable [#15](https://github.com/fluxxcode/egui-file-dialog/pull/15)
+- Added `FileDialog::movable` to set if the window is movable [#15](https://github.com/fluxxcode/egui-file-dialog/pull/15)
 
 ### 🔧 Changes
 - Removed the version of `egui-file-dialog` in the examples [#8](https://github.com/fluxxcode/egui-file-dialog/pull/8)

src/file_dialog.rs

@@ -104,6 +104,10 @@ pub struct FileDialog {
     window_default_size: egui::Vec2,
     /// The anchor of the window.
     window_anchor: Option<(egui::Align2, egui::Vec2)>,
+    /// If the window is resizable
+    window_resizable: bool,
+    /// If the window is movable
+    window_movable: bool,
 
     /// The dialog that is shown when the user wants to create a new directory.
     create_directory_dialog: CreateDirectoryDialog,
@@ -153,6 +157,8 @@ impl FileDialog {
             window_overwrite_title: None,
             window_default_size: egui::Vec2::new(650.0, 370.0),
             window_anchor: None,
+            window_resizable: true,
+            window_movable: true,
 
             create_directory_dialog: CreateDirectoryDialog::new(),
 
@@ -199,6 +205,20 @@ impl FileDialog {
         self
     }
 
+    /// Sets if the window is resizable.
+    pub fn resizable(mut self, resizable: bool) -> Self {
+        self.window_resizable = resizable;
+        self
+    }
+
+    /// Sets if the window is movable.
+    ///
+    /// Has no effect if an anchor is set.
+    pub fn movable(mut self, movable: bool) -> Self {
+        self.window_movable = movable;
+        self
+    }
+
     /// Sets the default file name when opening the dialog in `DialogMode::SaveFile` mode.
     pub fn default_file_name(mut self, name: &str) -> Self {
         self.default_file_name = name.to_string();
@@ -351,6 +371,8 @@ impl FileDialog {
             .default_size(self.window_default_size)
             .min_width(355.0)
             .min_height(200.0)
+            .resizable(self.window_resizable)
+            .movable(self.window_movable)
             .collapsible(false);
 
         if let Some((anchor, offset)) = self.window_anchor {