Add new MouseCursor interface for setting the mouse cursor.

ppapi/examples/mouse_cursor/mouse_cursor.cc

+// Copyright (c) 2012 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 "ppapi/cpp/graphics_2d.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/mouse_cursor.h"
+#include "ppapi/cpp/view.h"
+
+void FillRect(pp::ImageData* image, int left, int top, int width, int height,
+              uint32_t color) {
+  for (int y = std::max(0, top);
+       y < std::min(image->size().height() - 1, top + height);
+       y++) {
+    for (int x = std::max(0, left);
+         x < std::min(image->size().width() - 1, left + width);
+         x++)
+      *image->GetAddr32(pp::Point(x, y)) = color;
+  }
+}
+
+class MyInstance : public pp::Instance {
+ public:
+  MyInstance(PP_Instance instance)
+      : pp::Instance(instance), width_(0), height_(0) {
+    RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
+  }
+
+  virtual ~MyInstance() {
+  }
+
+  virtual void DidChangeView(const pp::View& view) {
+    width_ = view.GetRect().width();
+    height_ = view.GetRect().height();
+  }
+
+  virtual bool HandleInputEvent(const pp::InputEvent& event) {
+    switch (event.GetType()) {
+      case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+        return true;
+      case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+        HandleMove(pp::MouseInputEvent(event));
+        return true;
+      case PP_INPUTEVENT_TYPE_KEYDOWN:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+  void HandleMove(const pp::MouseInputEvent& event) {
+    pp::Point point = event.GetPosition();
+    int segments = 3;
+    if (point.y() < height_ / segments) {
+      // Top part gets custom cursor of wait.
+      pp::MouseCursor::SetCursor(this, PP_MOUSECURSOR_TYPE_WAIT);
+    } else if (point.y() < (height_ / segments) * 2) {
+      // Next part gets custom image cursor.
+      pp::ImageData cursor(this, pp::ImageData::GetNativeImageDataFormat(),
+                           pp::Size(32, 32), true);
+      // Note that in real life you will need to handle the case where the
+      // native format is different.
+      FillRect(&cursor, 0, 0, 32, 32, 0x80000080);
+      pp::MouseCursor::SetCursor(this, PP_MOUSECURSOR_TYPE_CUSTOM, cursor,
+                                 pp::Point(16, 16));
+    } else {
+      // Next part gets no cursor.
+      pp::MouseCursor::SetCursor(this, PP_MOUSECURSOR_TYPE_NONE);
+    }
+  }
+
+
+ private:
+  int width_;
+  int height_;
+};
+
+class MyModule : public pp::Module {
+ public:
+  MyModule() : pp::Module() {}
+  virtual ~MyModule() {}
+
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    return new MyInstance(instance);
+  }
+};
+
+namespace pp {
+
+// Factory function for your specialization of the Module object.
+Module* CreateModule() {
+  return new MyModule();
+}
+
+}  // namespace pp