Question

我遇到以下主题中描述的问题：

Scroll chart with mouse wheel in TeeChart

我从oficcial网站设置了示例Java演示，我正常运行它，我可以看到不同类型的图形等。

问题是我无法将MouseWheelListener添加到TChart。在上面的帖子中，有人回答如下： “以下代码适用于我在Eclipse中的TeeChart Java SWT：” 另一位用户评论如下：
“确实是这样的。我有完全相同的代码，但直到我手动将焦点放在图表上才能生效。”

所有的拳头答案中给出的代码在Eclipse Indigo中不起作用。第二，自给出答案以来已经有一段时间了，lib已经在某种程度上发生了变化，没有更多的“mouseScrolled”事件。有一个名为“mouseWheelMoved”的事件。在我的生活中，我不能让这个事件被解雇。

非常感谢任何建议，范例和意见。

感谢。

示例代码：

JFrame frame = new Jframe();
JPanel contentPane; 
TChart tChart2 = new TChart();
tChart2.setGraphics3D(null);
tChart2.setBounds(new Rectangle(6, 71, 572, 268));
// Mouse Wheel Listener
tChart2.addMouseWheelListener(new MouseWheelListener() {
        public void mouseWheelMoved(MouseWheelEvent e) {
        // TODO Auto-generated method stub
           System.out.println("mouseWheelMoved worked");
        }
});
contentPane = (JPanel) frame.getContentPane();
contentPane.add(tChart2);

Answer 1

你是对的。 MouseWheel事件是在TeeChart Java for SWT中触发的，但在TeeChart Java for Swing中没有。

我已将其添加到公共跟踪器（here）并已修复它以用于下一个维护版本。

对于那些有资源的人来说，修复包含TChart.java上的一些小改动：

--- a/Swing/src/com/steema/teechart/TChart.java
+++ b/Swing/src/com/steema/teechart/TChart.java
@@ -21,6 +21,8 @@ import java.awt.Toolkit;
 import java.awt.datatransfer.*;

 import com.steema.teechart.events.FrameworkMouseEvent;
+import com.steema.teechart.events.FrameworkMouseWheelEvent;
+
 import java.awt.event.*;
 import java.beans.*;
 import java.io.*;
@@ -1405,7 +1407,16 @@ public class TChart extends JComponent implements Serializable, IChart,
                                       e.getX(),e.getY(),e.getClickCount(),
                                       true,e.getButton());
     }
-
+    
+    private FrameworkMouseWheelEvent getFrameworkEvent(MouseWheelEvent e)
+    {
+      return new FrameworkMouseWheelEvent(e.getComponent(), e.getID(),
+                                           e.getWhen(), e.getModifiers(),
+                                           e.getX(), e.getY(), e.getClickCount(),
+                                           true, e.getScrollType(),
+                                           e.getScrollAmount(), e.getWheelRotation());
+    }
+    
     protected void processMouseEvent(MouseEvent e) {
         chart.cancelMouse = false;

@@ -1439,6 +1450,15 @@ public class TChart extends JComponent implements Serializable, IChart,


     protected void processMouseWheelEvent(MouseWheelEvent e) {
+       chart.cancelMouse = false;
+       if (_allowMouse) {
+           FrameworkMouseWheelEvent fwe = getFrameworkEvent(e);
+           
+           if (!chart.cancelMouse) {
+                super.processMouseWheelEvent(fwe);
+            }
+        }
     }

     private boolean _allowMouse = true;
--

一个新类：FrameworkMouseWheelEvent.java：

package com.steema.teechart.events;

import java.awt.Component;

public class FrameworkMouseWheelEvent extends java.awt.event.MouseWheelEvent {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public FrameworkMouseWheelEvent(Component source, int id, long when, int modifiers, int x, int y, int clickCount,
            boolean popupTrigger, int scrollType, int scrollAmount, int wheelRotation) {
        super(source, id, when, modifiers, x, y, clickCount, popupTrigger, scrollType, scrollAmount, wheelRotation);
    }

    public FrameworkMouseWheelEvent(Component source, int id, long when, int modifiers, int x, int y, int xAbs,
            int yAbs, int clickCount, boolean popupTrigger, int scrollType, int scrollAmount, int wheelRotation) {
        super(source, id, when, modifiers, x, y, xAbs, yAbs, clickCount, popupTrigger, scrollType, scrollAmount, wheelRotation);
    }

    public FrameworkMouseWheelEvent(Component source, int id, long when, int modifiers, int x, int y, int xAbs,
            int yAbs, int clickCount, boolean popupTrigger, int scrollType, int scrollAmount, int wheelRotation,
            double preciseWheelRotation) {
        super(source, id, when, modifiers, x, y, xAbs, yAbs, clickCount, popupTrigger, scrollType, scrollAmount, wheelRotation,
                preciseWheelRotation);
    }
}

鼠标滚轮未在TeeChart中被移动

1 个答案: