输入: - 几何形状的point2d的ArrayList
并将其转换为:
private void SetScale1(Graphics2D gr, int gr_width , int gr_height, double left_x , double right_x , double top_y , double bottom_y ){
Rectangle2D drawing_rect = new Rectangle2D.Double(left_x, top_y, right_x - left_x, bottom_y - top_y);
drawing_cx=(left_x+ right_x) / 2;
drawing_cy =(top_y + bottom_y) / 2;
at= AffineTransform.getTranslateInstance( -1* drawing_cx, -1*drawing_cy);
//gr.translate(-1 * drawing_cx, -1 * drawing_cy);
//gr.TranslateTransform(0, 0)
double scale_x=gr_width / drawing_rect.getWidth();
double scale_y=gr_height / Math.abs(drawing_rect.getHeight());
scale_x = Math.min(scale_x, scale_y);
scale_y = scale_x;
scale_x = Math.abs(scale_x);
// at = AffineTransform.getScaleInstance(scale_x, -1 * scale_y);
gr.scale(Math.round(scale_x), Math.round( scale_y));
//gr.scale(1.2, 1.2);
//gr.transform(tt);
gr.transform(at);
//' Translate to center over the drawing area.
graphics_cx =gr_width / 2;
graphics_cy = gr_height / 2;
gr.translate(graphics_cx, graphics_cy);
//
}
:======并在面板上显示
我想让zoomin找到一个特定点并从某些操作中选择它。
请帮我找一个关于如何放大这个Jpanel的解决方案......
答案 0 :(得分:0)
我想放大到特定位置,最简单的方法是首先转换到该位置,然后相应缩放,最后转换回来。