Index: ash/common/system/chromeos/palette/tools/laser_pointer_view.cc |
diff --git a/ash/common/system/chromeos/palette/tools/laser_pointer_view.cc b/ash/common/system/chromeos/palette/tools/laser_pointer_view.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e4ea524e1351abe0830eb646be176f52e2028b92 |
--- /dev/null |
+++ b/ash/common/system/chromeos/palette/tools/laser_pointer_view.cc |
@@ -0,0 +1,153 @@ |
+// Copyright 2016 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 "ash/common/system/chromeos/palette/tools/laser_pointer_view.h" |
+ |
+#include <memory> |
+ |
+#include "ash/common/shell_window_ids.h" |
+#include "ash/common/wm_root_window_controller.h" |
+#include "ash/common/wm_shell.h" |
+#include "ash/common/wm_window.h" |
+#include "third_party/skia/include/core/SkColor.h" |
+#include "third_party/skia/include/core/SkPaint.h" |
+#include "third_party/skia/include/core/SkRect.h" |
+#include "ui/compositor/layer.h" |
+#include "ui/gfx/canvas.h" |
+#include "ui/gfx/transform.h" |
+#include "ui/wm/core/coordinate_conversion.h" |
+ |
+namespace ash { |
+namespace { |
+ |
+const double kMouselaserUiStartRadius = 4; |
+const double kMouselaserUiEndRadius = 0.25; |
+const int kMouselaserUiStartOpacityValue = 200; |
+const int kMouselaserUiEndOpacityValue = 0; |
+ |
+views::Widget* CreateLaserPointerWidget() { |
+ views::Widget* widget = new views::Widget; |
+ views::Widget::InitParams params; |
+ params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS; |
+ params.name = "LaserOverlay"; |
+ params.accept_events = false; |
+ params.activatable = views::Widget::InitParams::ACTIVATABLE_NO; |
+ params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET; |
+ params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; |
+ WmShell::Get() |
+ ->GetRootWindowForNewWindows() |
+ ->GetRootWindowController() |
+ ->ConfigureWidgetInitParamsForContainer( |
+ widget, kShellWindowId_OverlayContainer, ¶ms); |
+ |
+ widget->Init(params); |
+ widget->SetOpacity(1.f); |
+ return widget; |
+} |
+ |
+float DistanceBetweenPoints(const gfx::Point& point1, |
+ const gfx::Point& point2) { |
+ float deltaX = point1.x() - point2.x(); |
+ float deltaY = point1.y() - point2.y(); |
+ return deltaX * deltaX + deltaY * deltaY; |
+} |
+ |
+void PaintLaser(gfx::Canvas* canvas, |
+ const LaserPointerPoints& points, |
+ const gfx::Rect& widget_bounds) { |
+ SkPaint paint; |
+ paint.setStyle(SkPaint::kStroke_Style); |
+ paint.setAntiAlias(true); |
+ paint.setStrokeJoin(SkPaint::kBevel_Join); |
+ SkColor paintColor; |
+ |
+ if (!points.IsEmpty()) { |
+ base::Time oldest = points.GetOldest().creationTime_; |
+ base::Time most_recent = points.GetMostRecent().creationTime_; |
+ gfx::Point last_point, current_point; |
+ int point_count = 0; |
+ int num_points = points.GetNumberOfPoints(); |
+ for (auto it = points.PointsStart(); it != points.PointsEnd(); |
+ it++, point_count++) { |
+ float normalized; |
+ // Only one point, the regular normalization will return undefined for |
+ // this case. |
+ if (oldest == most_recent) |
+ normalized = 1.0; |
+ else { // Normalize the distance. |
+ normalized = float{(it->creationTime_ - oldest).InMillisecondsF()} / |
+ float{(most_recent - oldest).InMillisecondsF()}; |
+ normalized = 1.0 - normalized; |
+ } |
+ |
+ float radius = |
+ float{kMouselaserUiStartRadius} - |
+ normalized * float{kMouselaserUiStartRadius - kMouselaserUiEndRadius}; |
+ int opacity = kMouselaserUiStartOpacityValue - |
+ int{normalized * float{kMouselaserUiStartOpacityValue - |
+ kMouselaserUiEndOpacityValue}}; |
+ gfx::Vector2d center = it->location_ - widget_bounds.origin(); |
+ current_point = gfx::Point(center.x(), center.y()); |
+ paintColor = SkColorSetARGB(opacity, 255, 0, 0); |
+ paint.setColor(paintColor); |
+ paint.setStrokeWidth(radius * 2); |
+ if (point_count == 0) { |
+ last_point = current_point; |
+ } else if (DistanceBetweenPoints(last_point, current_point) > |
+ radius * 4 * radius) { |
+ canvas->DrawLine(last_point, current_point, paint); |
+ last_point = current_point; |
+ } else if (point_count == num_points - 1) { |
+ canvas->DrawLine(last_point, current_point, paint); |
+ } |
+ } |
+ paintColor = SkColorSetARGB(kMouselaserUiStartOpacityValue, 255, 0, 0); |
+ paint.setColor(paintColor); |
+ paint.setStyle(SkPaint::kFill_Style); |
+ canvas->DrawCircle(current_point, kMouselaserUiStartRadius, paint); |
+ } |
+} |
+} // namespace |
+ |
+//////////////////////////////////////////////////////////////////////////////// |
+ |
+// LaserPointerView |
+LaserPointerView::LaserPointerView() |
+ : views::View(), laser_points_(base::TimeDelta()) { |
+ gfx::Rect newBoundingBox; |
+ newBoundingBox.SetRect(0, 0, 1388, 768); |
+ widget_.reset(CreateLaserPointerWidget()); |
+ widget_->SetBounds(newBoundingBox); |
+ widget_->Show(); |
+ widget_->SetContentsView(this); |
+} |
+ |
+LaserPointerView::~LaserPointerView() { |
+ Stop(); |
+} |
+ |
+void LaserPointerView::Stop() { |
+ laser_points_.Clear(); |
+ SetNewPoints(laser_points_); |
+} |
+ |
+void LaserPointerView::SetNewPoints(const LaserPointerPoints& laser_points) { |
+ laser_points_ = laser_points; |
+ gfx::Rect oldBoundingBox, newBoundingBox; |
+ oldBoundingBox = laser_points.GetBoundingBox(); |
+ newBoundingBox.SetRect( |
+ oldBoundingBox.x() - kMouselaserUiStartRadius, |
+ oldBoundingBox.y() - kMouselaserUiStartRadius, |
+ oldBoundingBox.width() + 2 * kMouselaserUiStartRadius, |
+ oldBoundingBox.height() + 2 * kMouselaserUiStartRadius); |
+ widget_->SetBounds(newBoundingBox); |
+ SchedulePaint(); |
+} |
+ |
+void LaserPointerView::OnPaint(gfx::Canvas* canvas) { |
+ canvas->Save(); |
+ PaintLaser(canvas, laser_points_, widget_->GetWindowBoundsInScreen()); |
+ canvas->Restore(); |
+} |
+} // namespace ash |