我正在使用Netbeans的视觉设计编辑器。 我有两张幻灯片和相应的 JLabels 。 我想要的是一个矩形, 当滑动器移动时会改变颜色。 我如何将它与设计师生成的代码整合在一起?
我如何在滑板旁边画我的矩形?
我正在使用Netbeans的视觉设计编辑器。 我有两张幻灯片和相应的 JLabels 。 我想要的是一个矩形, 当滑动器移动时会改变颜色。 我如何将它与设计师生成的代码整合在一起?
我如何在滑板旁边画我的矩形?
Java 中的颜色由 RGB
值组成。
Color c = new Color(red, green, blue)
Red
, Green
和 Blue
,在 0 和 255 之间都有 integer
值。 Netbeans 视觉编辑器允许您为您的滑块设定 最大
和 minimum
值。
将透明度添加到颜色用途
Color c = new Color(red, green, blue, alpha)
Red
, Green
, Blue
和 Alpha
都有0.0至1.0之间的浮点值。
要移动滑块时更改颜色, 请在拖动鼠标时添加一个事件( 您可以使用视觉编辑器这样做), 并使用 < code> slider. getValue () code > 获取值 。
要在 < em> sliders em > (至少应该有3个滑动器, 每个 rbg 组件各有一个) 附近绘制矩形( 至少应该有 3 个滑动器, 每个 rbg 组件各有一个), 以 < code> slider. getBounds () (边界包含 < code>x 和 code> < /code > 坐标加上
width
和 h88
) 检索滑动器的位置和尺寸。
示例( 绘制一个矩形 30x30 20 像素右侧的滑动符)
private void mouseDragged(java.awt.event.MouseEvent evt) {
color = new Color(sliderRed.getValue(), sliderGreen.getValue(), sliderBlue.getValue());
this.repaint();
}
public void paint(Graphics g) {
g.setColor(color)
g.fillRect(sliderRed.getBounds().x + sliderRed.getBounds().width + 20, sliderRed.getBounds().y, 30, 30);
}
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