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我有一個JFrame,在窗口的左上角添加一個窗格。這工作正常。出於某種原因,構成左上角窗格的gridbaglayout並不像我想要的那樣。GridBagLayout ipadY和定位
我添加的前三個按鈕位於第一個y行內部並且水平添加,但添加到gridY = 1的informationPane不會轉到下一行,它只會像按鈕一樣添加到右側。
另外,我不得不在每個按鈕上使用set preferred size,因爲iPadY並沒有垂直擴展按鈕。
private JPanel setUpTop()
{
JPanel pane = new JPanel();
pane.setLayout(new GridLayout(1, 2));
JPanel controlPane = new JPanel();
pane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
controlPane.setBackground(Color.RED);
c.gridx = 0;
c.gridy = 0;
previousSongBT = new JButton("<<");
previousSongBT.setPreferredSize(new Dimension(CTRL_BT_WIDTH, CTRL_BT_HEIGHT));
controlPane.add(previousSongBT, c);
c.gridx = 1;
c.gridy = 0;
playBT = new JButton(">");
playBT.setPreferredSize(new Dimension(CTRL_BT_WIDTH, CTRL_BT_HEIGHT));
controlPane.add(playBT, c);
c.gridx = 2;
c.gridy = 0;
nextSongBT = new JButton(">>");
nextSongBT.setPreferredSize(new Dimension(CTRL_BT_WIDTH, CTRL_BT_HEIGHT));
controlPane.add(nextSongBT, c);
c.gridx = 0;
c.gridy = 1;
c.weighty = 1;
c.gridwidth = 3;
c.anchor = GridBagConstraints.PAGE_END;
JPanel informationPane = new JPanel();
informationPane.add(new JButton("Bottom pane"));
informationPane.setBackground(Color.GREEN);
controlPane.add(informationPane, c);
pane.add(controlPane);
return pane;
}
下面是一個補充說,面板的代碼:
//Top-Left
c.anchor = GridBagConstraints.FIRST_LINE_START;
c.insets = new Insets(20,20,0,0); //top padding
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.weighty = 0.5;
this.getContentPane().add(setUpTop(), c);
這裏有一個更清晰的圖片,我想綠色面板要低於其他三個按鈕:
我不會用gridbag保持穩定,但是您是否嘗試將gridy設置爲更大的值? – cerealy