Java JNA-更改Windows光标
我试图从一个名为cursorOptions的数组中将Windows游标设置为随机游标,该数组保存每种游标类型的值Java JNA-更改Windows光标,java,winapi,jna,Java,Winapi,Jna,我试图从一个名为cursorOptions的数组中将Windows游标设置为随机游标,该数组保存每种游标类型的值 int[] cursorOptions = new int[]{32650, 32515, 32649, 32651, 32513, 32648, 32646, 32643, 32645, 32642, 32644, 32516, 32514, 32512}; 我正在使用SetCursor(WinDef.LONG hcur)JNA方法(在第1157行:)但不知道应该为hcur设置什
int[] cursorOptions = new int[]{32650, 32515, 32649, 32651, 32513, 32648, 32646, 32643, 32645, 32642, 32644, 32516, 32514, 32512};
我正在使用SetCursor(WinDef.LONG hcur)JNA方法(在第1157行:)但不知道应该为hcur设置什么值。我试图从数组中发送新的游标值,但结果为false
WinDef.LONG u = new WinDef.LONG(cursorOptions[rand.nextInt(cursorOptions.length-1)]);
user32.SetCursor(u);
user32.ShowCursor(true);
接下来,我尝试分配不同游标值的hashCode值(对于IBar游标为65541),该值的计算结果为true,但没有改变游标值
WinDef.LONG g = new WinDef.LONG(65541);
user32.SetCursor(g);
user32.ShowCursor(true);
hcur的什么值会改变光标?为什么游标的hashCode值计算为true,但在SetCursor(WinDef.LONG hcur)中发送时不更改游标
完整代码:
import com.sun.jna.Native;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.WinDef;
import com.sun.jna.win32.W32APIOptions;
import java.awt.*;
import java.util.*;
import java.util.List;
import java.util.concurrent.TimeUnit;
class MouseManipulation {
private User32 user32;
MouseManipulation() {
user32 = User32.INSTANCE;
}
/**
* @return cursorInfo.hCursor Returns the HCURSOR of the cursor on screen
*/
WinDef.HCURSOR getCurrentCursor(){
CursorInfo cursorInfo = new CursorInfo();
this.user32.GetCursorInfo(cursorInfo);
return cursorInfo.hCursor;
}
/*
* Set the cursor to be a random cursor within the defined scope of cursorOptions
*/
void ChangeMouseCursor() {
try {
int[] cursorOptions = new int[]{32650, 32515, 32649, 32651, 32513, 32648, 32646, 32643, 32645, 32642, 32644, 32516, 32514, 32512};
Random rand = new Random();
WinDef.HCURSOR hc = getCurrentCursor();
System.out.println("The HCURSOR: "+hc.toString());
System.out.println("The HCURSOR hashCode: "+hc.hashCode());
//I want this to randomly pick from the Array of cursor values and set that as the newest cursor icon
//but I have no clue what value for WinDef.LONG should be
WinDef.LONG u = new WinDef.LONG(cursorOptions[rand.nextInt(cursorOptions.length-1)]);
user32.SetCursor(u);
user32.ShowCursor(true);
System.out.println("When using the array: "+user32.SetCursor(u));
//This evaluates to true yet doesn't change the cursor icon on screen;
//for instance 65541 is the hashCode for IBar and when cursor is NormalPointer it doesn't change.
WinDef.LONG g = new WinDef.LONG(65541);
user32.SetCursor(g);
user32.ShowCursor(true);
System.out.println("When using the hashCode: "+user32.SetCursor(g));
}
//Sometimes the cursor won't be found so we catch the NullPointerException
catch (NullPointerException e){
e.printStackTrace();
}
}
/*
* Take advantage of the JNA 4.5.2 and the JNA 4.5.2 platform to interact with the Win32 API
*/
public interface User32 extends com.sun.jna.Library {
MouseManipulation.User32 INSTANCE = (MouseManipulation.User32) Native.loadLibrary("user32", MouseManipulation.User32.class, W32APIOptions.DEFAULT_OPTIONS);
boolean SetCursor(WinDef.LONG hcur);
int GetCursorInfo(CursorInfo cursorInfo);
int ShowCursor(boolean bShow);
}
/*
* This class was made to get the cursor's information such as its pointer and then later gets its hashCode value
Credits: deFreitas at: https://stackoverflow.com/questions/47634213/get-mouse-type-in-java-using-jna
*/
public static class CursorInfo extends Structure {
public int cbSize;//Access must be public
public int flags;
public WinDef.HCURSOR hCursor;//Access must be public
public WinDef.POINT ptScreenPos;
CursorInfo() {
this.cbSize = Native.getNativeSize(CursorInfo.class, null);
}
@Override
protected List<String> getFieldOrder() {
return Arrays.asList("cbSize", "flags", "hCursor", "ptScreenPos");
}
}
}
电话:
final MouseManipulation mouse = new MouseManipulation();
mouse.ChangeMouseCursor();
注意:即使不是在java应用程序上,我也希望windows光标发生变化,因此JFrame解决方案和其他类似的事情是没有根据的
我先谢谢你 设置光标的效果仅持续到下一次
SetCursor
调用。SetCursor
在windows过程中被多次调用,以响应windows管理器发送的消息,从而在您将鼠标移动到windows上时改变光标形状,并在较新的windows版本中(即使鼠标处于静止状态)提供用户反馈
要永久更改光标,可以使用SetClassLongPtr(hwnd、GCLP\u HCURSOR、光标句柄)代码>或子类窗口过程,并处理WM_SETCURSOR
消息(不幸的是在C中):
光标\u句柄
必须是进程窗口的有效句柄
final MouseManipulation mouse = new MouseManipulation();
mouse.ChangeMouseCursor();
case WM_SETCURSOR:
// If you omit test below, you will change cursor also for scrollbars, frames, etc.
if ( LOWORD( lparam ) == HTCLIENT )
SetCursor( cursor_handle );
else
// This will also handle cursor for scrollbars and frames.
return DefWindowProc( hwnd, msg, wparam, lparam );
return TRUE;