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我有一個應用程序，其圖形被認爲以1024x768顯示。java JFrame使用虛擬繪圖空間縮放UI顯示
我想在大小靈活應用無需重寫所有的繪圖代碼，位置計算等。
爲了實現我試圖重寫的JFrame容器的paint方法以下列方式：
@Override
public void paint(Graphics g)
{
BufferedImage img = new BufferedImage(this.desiredWidth, this.desiredHeight, BufferedImage.TYPE_INT_ARGB);
Graphics2D gi = (Graphics2D) img.getGraphics();
gi.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB);
gi.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
gi.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
super.paint(gi);
gi.dispose();
((Graphics2D) g).drawImage(img, screenScale, null);
}
screenScale是我在構造函數中創建的AffineTransform對象，它根據目標大小進行適當的縮放。
現在的問題是：我的子組件會被繪製和縮放，但是會受到父JFrame的限制。因此，如果我的父框架的尺寸爲640x480，那麼我添加的子圖層只能在繪製的1024x768 BufferedImage的640x480分數內繪製。 我想在某些地方子組件使用JFrame父母的getPreferredSize，因爲孩子總是有這個值作爲邊界。所以最終我的縮放策略與孩子的繪畫行爲相沖突，因爲他們完全忽略了他們爲繪製而交付的圖形對象的邊界。
最終，曾經我做什麼，我的孩子層（從JPanel的衍生，如果該事項）當目標尺寸比我的「虛擬」屏幕尺寸更小的會被截斷。
任何人都可以提供更好的解決方案或提示我如何繞過圖形界限被忽略的奇怪行爲？
編輯：工作測試代碼
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.print.attribute.standard.OrientationRequested;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class AffineTransformTest
{
private static TransformingFrame canvas;
private static JButton button;
private static TestLayer layer;
public static void main(String[] args)
{
canvas = new TransformingFrame();
canvas.addMouseWheelListener(new ScaleHandler());
layer=new TestLayer(canvas.originalSize);
canvas.getContentPane().add(layer);
layer.setVisible(true);
button = new JButton("asdf");
canvas.setUndecorated(true);
button.setVisible(true);
canvas.getContentPane().add(button);
canvas.pack();
canvas.setLayout(new BorderLayout());
canvas.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
canvas.setPreferredSize(canvas.originalSize);
canvas.setSize(canvas.originalSize);
canvas.setLayout(null);
canvas.setVisible(true);
canvas.validate();
}
@SuppressWarnings("serial")
private static class TransformingFrame extends JFrame
{
private double scale;
private final Dimension originalSize;
private AffineTransform tx = new AffineTransform();
TransformingFrame()
{
originalSize=new Dimension(800,600);
scale = 1;
}
@Override
public void paint(Graphics g)
{
BufferedImage offscreenBuffer=new BufferedImage(originalSize.width,originalSize.height, BufferedImage.TYPE_INT_ARGB);
Graphics bufferGraphics=offscreenBuffer.getGraphics();
super.paint(bufferGraphics);
bufferGraphics.dispose();
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g.setColor(Color.black);
g.fillRect(0, 0, getWidth(), getHeight());
((Graphics2D) g).drawImage(offscreenBuffer, tx,null);
}
@Override
public void paintComponents(Graphics g)
{
BufferedImage offscreenBuffer=new BufferedImage(originalSize.width,originalSize.height, BufferedImage.TYPE_INT_ARGB);
Graphics bufferGraphics=offscreenBuffer.getGraphics();
super.paintComponents(bufferGraphics);
bufferGraphics.dispose();
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g.setColor(Color.black);
g.fillRect(0, 0, getWidth(), getHeight());
((Graphics2D) g).drawImage(offscreenBuffer, tx,null);
}
@Override
public void paintAll(Graphics g)
{
BufferedImage offscreenBuffer=new BufferedImage(originalSize.width,originalSize.height, BufferedImage.TYPE_INT_ARGB);
Graphics bufferGraphics=offscreenBuffer.getGraphics();
super.paintAll(bufferGraphics);
bufferGraphics.dispose();
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
((Graphics2D) g).setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g.setColor(Color.black);
g.fillRect(0, 0, getWidth(), getHeight());
((Graphics2D) g).drawImage(offscreenBuffer, tx,null);
}
}
@SuppressWarnings("serial")
private static class TestLayer extends JPanel{
public TestLayer(Dimension originalSize)
{
this.setPreferredSize(originalSize);
this.setSize(originalSize);
setOpaque(false);
setDoubleBuffered(false);
}
@Override
public void paint(Graphics g)
{
Graphics2D ourGraphics = (Graphics2D) g;
super.paint(ourGraphics);
ourGraphics.setColor(Color.green);
ourGraphics.fillRect(0, 0, getWidth(), getHeight());
ourGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
ourGraphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
ourGraphics.setColor(Color.BLACK);
ourGraphics.drawRect(50, 50, 50, 50);
ourGraphics.fillOval(100, 100, 100, 100);
ourGraphics.drawString("Test Affine Transform", 50, 30);
ourGraphics.drawString(canvas.tx.toString(), 50, 250);
}
}
private static class ScaleHandler implements MouseWheelListener
{
public void mouseWheelMoved(MouseWheelEvent e)
{
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL)
{
// make it a reasonable amount of zoom
// .1 gives a nice slow transition
canvas.scale += (.1 * e.getWheelRotation());
// don't cross negative threshold.
// also, setting scale to 0 has bad effects
canvas.scale = Math.max(0.00001, canvas.scale);
canvas.tx.setTransform(new AffineTransform());
canvas.tx.scale(canvas.scale, canvas.scale);
canvas.setPreferredSize(new Dimension((int)(canvas.originalSize.width*canvas.scale),(int)(canvas.originalSize.height*canvas.scale)));
canvas.setSize(new Dimension((int)(canvas.originalSize.width*canvas.scale),(int)(canvas.originalSize.height*canvas.scale)));
canvas.validate();
canvas.repaint();
}
}
}
}
由於某種原因該代碼工作：與未經換算的輸出，expectet輸出和產生的輸出
expected output resulted output
更新上述代碼更新結果（除了按鈕消失）..也許我的錯誤是在其他地方的兒童層..我會去調查，
好幾個小時與它周圍的擺弄之後，我得出的結論是，繪圖限制孩子小組在油漆（圖形G）方法獲得不允許畫比母體的規模。在這個例子中它可以工作，但在完整的應用程序中並不行似乎一些設置強制在我的應用程序上的行爲，但不是演示應用程序。
我在代碼中沒有使用標籤，並且我也以同樣的方式覆蓋Paintcomponents和PaintAll，它的確有部分功能。唯一的問題是在縮放發生之前，我添加到JPanel中的部分圖層被切斷。 – anubisviech
@anubisviech沒有開玩笑，真正的幫助你的問題，你必須編輯你的問題，並在這裏張貼代碼http://sscce.org/表格， – mKorbel
謝謝你的提示，虐待嘗試明天張貼減少可編譯的樣本 – anubisviech