1/*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <windowsx.h>
27#include <jni.h>
28#include <jni_util.h>
29#include "awt.h"
30#include "awt_Object.h"
31#include "awt_Component.h"
32
33extern "C" {
34
35/*
36 * Class:     sun_awt_windows_WMouseInfoPeer
37 * Method:    isWindowUnderMouse
38 * Signature: (Ljava/awt/Window)Z
39 */
40JNIEXPORT jboolean JNICALL
41Java_sun_awt_windows_WMouseInfoPeer_isWindowUnderMouse(JNIEnv *env, jclass cls,
42                                                        jobject window)
43{
44    POINT pt;
45
46    if (env->EnsureLocalCapacity(1) < 0) {
47        return JNI_FALSE;
48    }
49
50    jobject winPeer = AwtObject::GetPeerForTarget(env, window);
51    PDATA pData;
52    pData = JNI_GET_PDATA(winPeer);
53    env->DeleteLocalRef(winPeer);
54    if (pData == NULL) {
55        return JNI_FALSE;
56    }
57
58    AwtComponent * ourWindow = (AwtComponent *)pData;
59    HWND hwnd = ourWindow->GetHWnd();
60    VERIFY(::GetCursorPos(&pt));
61
62    AwtComponent * componentFromPoint = AwtComponent::GetComponent(::WindowFromPoint(pt));
63
64    while (componentFromPoint != NULL
65        && componentFromPoint->GetHWnd() != hwnd
66        && !AwtComponent::IsTopLevelHWnd(componentFromPoint->GetHWnd()))
67    {
68        componentFromPoint = componentFromPoint->GetParent();
69    }
70
71    return ((componentFromPoint != NULL) && (componentFromPoint->GetHWnd() == hwnd)) ? JNI_TRUE : JNI_FALSE;
72
73}
74
75/*
76 * Class:     sun_awt_windows_WMouseInfoPeer
77 * Method:    fillPointWithCoords
78 * Signature: (Ljava/awt/Point)I
79 */
80JNIEXPORT jint JNICALL
81Java_sun_awt_windows_WMouseInfoPeer_fillPointWithCoords(JNIEnv *env, jclass cls, jobject point)
82{
83    static jclass pointClass = NULL;
84    static jfieldID xID, yID;
85    POINT pt;
86
87    VERIFY(::GetCursorPos(&pt));
88    if (pointClass == NULL) {
89        jclass pointClassLocal = env->FindClass("java/awt/Point");
90        DASSERT(pointClassLocal != NULL);
91        if (pointClassLocal == NULL) {
92            return (jint)0;
93        }
94        pointClass = (jclass)env->NewGlobalRef(pointClassLocal);
95        env->DeleteLocalRef(pointClassLocal);
96    }
97
98    HMONITOR monitor = MonitorFromPoint(pt, MONITOR_DEFAULTTOPRIMARY);
99    int screen = AwtWin32GraphicsDevice::GetScreenFromHMONITOR(monitor);
100    Devices::InstanceAccess devices;
101    AwtWin32GraphicsDevice *device = devices->GetDevice(screen);
102
103    xID = env->GetFieldID(pointClass, "x", "I");
104    CHECK_NULL_RETURN(xID, (jint)0);
105    yID = env->GetFieldID(pointClass, "y", "I");
106    CHECK_NULL_RETURN(yID, (jint)0);
107
108    int x = (device == NULL) ? pt.x : device->ScaleDownX(pt.x);
109    int y = (device == NULL) ? pt.y : device->ScaleDownY(pt.y);
110
111    env->SetIntField(point, xID, x);
112    env->SetIntField(point, yID, y);
113
114    // Always return 0 on Windows: we assume there's always a
115    // virtual screen device used.
116    return (jint)0;
117}
118
119} // extern "C"
120