macOS: Implement with_resize_increments (#519)

Fixes #135

CHANGELOG.md

@@ -11,6 +11,8 @@
 - Fixed bug on macOS where using `with_decorations(false)` would cause `set_decorations(true)` to produce a transparent titlebar with no title.
 - Implemented `MonitorId::get_position` on macOS.
 - On macOS, `Window::get_current_monitor` now returns accurate values.
+- Added `WindowBuilderExt::with_resize_increments` to macOS.
+- **Breaking:** On X11, `WindowBuilderExt::with_resize_increments` and `WindowBuilderExt::with_base_size` now take `u32` values rather than `i32`.
 
 # Version 0.14.0 (2018-05-09)
 

src/os/macos.rs

@@ -71,64 +71,72 @@ impl From<ActivationPolicy> for NSApplicationActivationPolicy {
 ///  - `with_titlebar_buttons_hidden`
 ///  - `with_fullsize_content_view`
 pub trait WindowBuilderExt {
+    /// Sets the activation policy for the window being built.
     fn with_activation_policy(self, activation_policy: ActivationPolicy) -> WindowBuilder;
+    /// Enables click-and-drag behavior for the entire window, not just the titlebar.
     fn with_movable_by_window_background(self, movable_by_window_background: bool) -> WindowBuilder;
+    /// Makes the titlebar transparent and allows the content to appear behind it.
     fn with_titlebar_transparent(self, titlebar_transparent: bool) -> WindowBuilder;
+    /// Hides the window title.
     fn with_title_hidden(self, title_hidden: bool) -> WindowBuilder;
+    /// Hides the window titlebar.
     fn with_titlebar_hidden(self, titlebar_hidden: bool) -> WindowBuilder;
+    /// Hides the window titlebar buttons.
     fn with_titlebar_buttons_hidden(self, titlebar_buttons_hidden: bool) -> WindowBuilder;
+    /// Makes the window content appear behind the titlebar.
     fn with_fullsize_content_view(self, fullsize_content_view: bool) -> WindowBuilder;
+    /// Build window with `resizeIncrements` property. Values must not be 0.
+    fn with_resize_increments(self, width_inc: u32, height_inc: u32) -> WindowBuilder;
 }
 
 impl WindowBuilderExt for WindowBuilder {
-    /// Sets the activation policy for the window being built
     #[inline]
     fn with_activation_policy(mut self, activation_policy: ActivationPolicy) -> WindowBuilder {
         self.platform_specific.activation_policy = activation_policy;
         self
     }
 
-    /// Enables click-and-drag behavior for the entire window, not just the titlebar
     #[inline]
     fn with_movable_by_window_background(mut self, movable_by_window_background: bool) -> WindowBuilder {
         self.platform_specific.movable_by_window_background = movable_by_window_background;
         self
     }
 
-    /// Makes the titlebar transparent and allows the content to appear behind it
     #[inline]
     fn with_titlebar_transparent(mut self, titlebar_transparent: bool) -> WindowBuilder {
         self.platform_specific.titlebar_transparent = titlebar_transparent;
         self
     }
 
-    /// Hides the window titlebar
     #[inline]
     fn with_titlebar_hidden(mut self, titlebar_hidden: bool) -> WindowBuilder {
         self.platform_specific.titlebar_hidden = titlebar_hidden;
         self
     }
 
-    /// Hides the window titlebar buttons
     #[inline]
     fn with_titlebar_buttons_hidden(mut self, titlebar_buttons_hidden: bool) -> WindowBuilder {
         self.platform_specific.titlebar_buttons_hidden = titlebar_buttons_hidden;
         self
     }
 
-    /// Hides the window title
     #[inline]
     fn with_title_hidden(mut self, title_hidden: bool) -> WindowBuilder {
         self.platform_specific.title_hidden = title_hidden;
         self
     }
 
-    /// Makes the window content appear behind the titlebar
     #[inline]
     fn with_fullsize_content_view(mut self, fullsize_content_view: bool) -> WindowBuilder {
         self.platform_specific.fullsize_content_view = fullsize_content_view;
         self
     }
+
+    #[inline]
+    fn with_resize_increments(mut self, width_inc: u32, height_inc: u32) -> WindowBuilder {
+        self.platform_specific.resize_increments = Some((width_inc, height_inc));
+        self
+    }
 }
 
 /// Additional methods on `MonitorId` that are specific to MacOS.

src/os/unix.rs

@@ -199,9 +199,9 @@ pub trait WindowBuilderExt {
     fn with_x11_screen(self, screen_id: i32) -> WindowBuilder;
 
     /// Build window with resize increment hint. Only implemented on X11.
-    fn with_resize_increments(self, width_inc: i32, height_inc: i32) -> WindowBuilder;
+    fn with_resize_increments(self, width_inc: u32, height_inc: u32) -> WindowBuilder;
     /// Build window with base size hint. Only implemented on X11.
-    fn with_base_size(self, base_width: i32, base_height: i32) -> WindowBuilder;
+    fn with_base_size(self, base_width: u32, base_height: u32) -> WindowBuilder;
 }
 
 impl WindowBuilderExt for WindowBuilder {
@@ -220,13 +220,13 @@ impl WindowBuilderExt for WindowBuilder {
     }
 
     #[inline]
-    fn with_resize_increments(mut self, width_inc: i32, height_inc: i32) -> WindowBuilder {
+    fn with_resize_increments(mut self, width_inc: u32, height_inc: u32) -> WindowBuilder {
         self.platform_specific.resize_increments = Some((width_inc, height_inc));
         self
     }
 
     #[inline]
-    fn with_base_size(mut self, base_width: i32, base_height: i32) -> WindowBuilder {
+    fn with_base_size(mut self, base_width: u32, base_height: u32) -> WindowBuilder {
         self.platform_specific.base_size = Some((base_width, base_height));
         self
     }

src/platform/linux/mod.rs

@@ -42,8 +42,8 @@ const BACKEND_PREFERENCE_ENV_VAR: &str = "WINIT_UNIX_BACKEND";
 pub struct PlatformSpecificWindowBuilderAttributes {
     pub visual_infos: Option<XVisualInfo>,
     pub screen_id: Option<i32>,
-    pub resize_increments: Option<(i32, i32)>,
+    pub resize_increments: Option<(u32, u32)>,
-    pub base_size: Option<(i32, i32)>,
+    pub base_size: Option<(u32, u32)>,
 }
 
 lazy_static!(

src/platform/macos/window.rs

@@ -488,6 +488,7 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub titlebar_hidden: bool,
     pub titlebar_buttons_hidden: bool,
     pub fullsize_content_view: bool,
+    pub resize_increments: Option<(u32, u32)>,
 }
 
 pub struct Window2 {
@@ -772,6 +773,13 @@ impl Window2 {
                     window.setMovableByWindowBackground_(YES);
                 }
                 
+                if let Some((x, y)) = pl_attrs.resize_increments {
+                    if x >= 1 && y >= 1 {
+                        let size = NSSize::new(x as _, y as _);
+                        window.setResizeIncrements_(size);
+                    }
+                }
+
                 window.center();
                 window
             });