Adding split view divider widget.

athena/common/drag_handle_unittest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "athena/common/drag_handle.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/test/aura_test_base.h"
+#include "ui/aura/window.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace athena {
+
+class DragHandleDelegateTest : public DragHandle::ScrollDelegate {
+ public:
+  explicit DragHandleDelegateTest()
+      : can_scroll_(true),
+        begin_delta_(0),
+        got_scroll_end_(false),
+        update_delta_(0) {}
+
+  virtual ~DragHandleDelegateTest() {}
+
+  void Reset() {
+    can_scroll_ = true;
+    begin_delta_ = 0;
+    got_scroll_end_ = false;
+    update_delta_ = 0;
+  }
+
+  float begin_delta() { return begin_delta_; }
+  bool got_scroll_end() { return got_scroll_end_; }
+  float update_delta() { return update_delta_; }
+
+  void set_can_scroll(bool can_scroll) { can_scroll_ = can_scroll; }
+
+ private:
+  // DragHandle::ScrollDelegate:
+  virtual void HandleScrollBegin(float delta) OVERRIDE {
+    begin_delta_ = delta;
+  }
+
+  virtual void HandleScrollEnd() OVERRIDE {
+    got_scroll_end_ = true;
+  }
+
+  virtual void HandleScrollUpdate(float delta) OVERRIDE {
+    update_delta_ = delta;
+  }
+
+  virtual bool HandleCanScroll() OVERRIDE {
+    return can_scroll_;
+  }
+
+  bool can_scroll_;
+  float begin_delta_;
+  bool got_scroll_end_;
+  float update_delta_;
+
+  DISALLOW_COPY_AND_ASSIGN(DragHandleDelegateTest);
+};
+
+typedef aura::test::AuraTestBase DragHandleTest;
+
+const int kDragHandleWidth = 10;
+const int kDragHandleHeight = 100;
+const int kDragHandleMargin = 2;
+
+ui::GestureEvent CreateGestureEvent(ui::EventType type,
+                                    float x,
+                                    float delta_x) {
+  ui::GestureEvent event(
+      x,
+      kDragHandleMargin + 1,
+      0,
+      base::TimeDelta::FromInternalValue(base::Time::Now().ToInternalValue()),
+      ui::GestureEventDetails(type, delta_x, 0));
+  event.set_root_location(gfx::PointF(x, kDragHandleMargin + 1));
+  return event;
+}
+
+TEST_F(DragHandleTest, ScrollTest) {
+  DragHandleDelegateTest delegate;
+  scoped_ptr<views::View> drag_handle(
+      CreateDragHandleView(DragHandle::ScrollDirection::HORIZONTAL,
+                           &delegate,
+                           kDragHandleWidth,
+                           kDragHandleHeight,
+                           kDragHandleMargin));
+
+  views::Widget widget;
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params.parent = root_window();
+  params.accept_events = true;
+  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  widget.Init(params);
+  widget.SetContentsView(drag_handle.get());
+  const gfx::Size& size = gfx::Size(kDragHandleWidth, kDragHandleHeight);
+  widget.SetSize(size);
+  widget.SetBounds(gfx::Rect(0, 0, size.width(), size.height()));
+
+  const float begin_x = 4.0;
+  const float begin_delta = 10.0;
+  const float update_delta = 15.0;
+
+  ui::GestureEvent scroll_begin_model =
+      CreateGestureEvent(ui::ET_GESTURE_SCROLL_BEGIN, begin_x, begin_delta);
+  ui::GestureEvent scroll_update_model =
+      CreateGestureEvent(ui::ET_GESTURE_SCROLL_UPDATE,
+                         begin_x + update_delta,
+                         update_delta - begin_delta);
+  ui::GestureEvent scroll_end_model =
+      CreateGestureEvent(ui::ET_GESTURE_SCROLL_END, begin_x + update_delta, 0);
+  ui::GestureEvent fling_start_model =
+      CreateGestureEvent(ui::ET_SCROLL_FLING_START, begin_x + update_delta, 0);
+
+  // Normal scroll
+  ui::GestureEvent e(scroll_begin_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(begin_delta, delegate.begin_delta());
+  EXPECT_EQ(0, delegate.update_delta());
+  EXPECT_FALSE(delegate.got_scroll_end());
+  e = ui::GestureEvent(scroll_update_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(update_delta, delegate.update_delta());
+  EXPECT_FALSE(delegate.got_scroll_end());
+  e = ui::GestureEvent(scroll_end_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(update_delta, delegate.update_delta());
+  EXPECT_TRUE(delegate.got_scroll_end());
+
+  delegate.Reset();
+
+  // Scroll ending with a fling
+  e = ui::GestureEvent(scroll_begin_model);
+  widget.OnGestureEvent(&e);
+  e = ui::GestureEvent(scroll_update_model);
+  widget.OnGestureEvent(&e);
+  e = ui::GestureEvent(fling_start_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_TRUE(delegate.got_scroll_end());
+
+  delegate.Reset();
+
+  // Changing CanScroll mid-scroll should't prevent events for the current
+  // scroll from coming through.
+  e = ui::GestureEvent(scroll_begin_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(begin_delta, delegate.begin_delta());
+  delegate.set_can_scroll(false);
+  e = ui::GestureEvent(scroll_update_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(update_delta, delegate.update_delta());
+  e = ui::GestureEvent(scroll_end_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_TRUE(delegate.got_scroll_end());
+
+  delegate.Reset();
+
+  // When CanScroll is false, new scroll events should be ignored
+  delegate.set_can_scroll(false);
+  e = ui::GestureEvent(scroll_begin_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(0, delegate.begin_delta());
+  e = ui::GestureEvent(scroll_update_model);
+  widget.OnGestureEvent(&e);
+  EXPECT_EQ(0, delegate.update_delta());
+  e = ui::GestureEvent(scroll_end_model);
+  widget.OnGestureEvent(&e);
+
+  drag_handle.reset();
+}
+
+}  // namespace athena