Question

打破我的旧习惯，我使用GridBagLayout创建了一个GUI。我对这个容器还很新，所以很明显我的代码会有缺陷。

当我运行程序时，GUI看起来像这样：http://i.imgur.com/90J0paH.png

第一次尝试并不算太糟糕，但窗户高度比我预期的要大！我将滚动窗格添加到单独的面板，以便我可以使应用程序更小。因为我没有设置窗口大小的限制，我认为滚动条没有显示，因为Java自动调整窗口大小，以便尽可能多的组件显示。

此外，底部标签“0 out of ..”有点向右偏移。没什么大不了的。

但真正的恐怖表现在我调整窗口大小时。 http://i.imgur.com/njI9cgn.png

现在我们得到了滚动条，但是底部面板突然变大了，其他三个面板变得奇怪了。（水平滚动条甚至不应该显示）

这是我的代码。感谢所有可以提供帮助的GUI专家！

...create the components blah blah blah
//----------------------- ADD COMPONENTS TO PANELS -----------------------

    c.fill = GridBagConstraints.BOTH;
    c.weightx = 0.5;
    c.weighty = 0.5;
    c.ipadx = 3;
    c.ipady = 3;

    //TODO: Add "Level", "Amount", etc. labels

    for (int i = 0; i < 10; i++)    //Normal troops
    {
        c.gridy = i;

        c.gridx = 0;
        c.insets = new Insets(0, 0, 0, 0);
        normalTroopPanel.add(icon[i], c);

        c.insets = new Insets(10, 10, 10, 0);
        c.gridx = 1;
        normalTroopPanel.add(setLevel[i], c);

        c.gridx = 2;
        normalTroopPanel.add(setAmount[i], c);

        c.insets = new Insets(10, 20, 10, 0);
        c.gridx = 3;
        normalTroopPanel.add(typeTotalCost[i], c);

        c.gridx = 4;
        normalTroopPanel.add(typeTotalTime[i], c);
    }
    normalTroopPanel.setPreferredSize(new Dimension(400, 520));

    for (int i = 10; i < 15; i++)   //Dark troops
    {
        c.gridy = i;

        c.gridx = 0;
        c.insets = new Insets(0, 0, 0, 0);
        darkTroopPanel.add(icon[i], c);

        c.insets = new Insets(10, 10, 10, 0);
        c.gridx = 1;
        darkTroopPanel.add(setLevel[i], c);

        c.gridx = 2;
        darkTroopPanel.add(setAmount[i], c);

        c.insets = new Insets(10, 20, 10, 0);
        c.gridx = 3;
        darkTroopPanel.add(typeTotalCost[i], c);

        c.gridx = 4;
        darkTroopPanel.add(typeTotalTime[i], c);
    }
    darkTroopPanel.setPreferredSize(new Dimension(400, 250));

    for (int i = 15; i < 20; i++)   //Spells
    {
        c.gridy = i;

        c.gridx = 0;
        c.insets = new Insets(0, 0, 0, 0);
        spellPanel.add(icon[i], c);

        c.insets = new Insets(10, 10, 10, 0);
        c.gridx = 1;
        spellPanel.add(setLevel[i], c);

        c.gridx = 2;
        spellPanel.add(setAmount[i], c);

        c.insets = new Insets(10, 20, 10, 0);
        c.gridx = 3;
        spellPanel.add(typeTotalCost[i], c);

        c.gridx = 4;
        spellPanel.add(typeTotalTime[i], c);
    }
    spellPanel.setPreferredSize(new Dimension(400, 250));

    //Totals panel
    c.gridx = 0;
    c.gridy = 0;
    totalsPanel.add(spaceTaken, c);
    c.gridx = 1;
    totalsPanel.add(setHousingLimit, c);
    c.gridx = 2;
    totalsPanel.add(totalElixirCost, c);
    c.gridx = 3;
    totalsPanel.add(totalDarkCost, c);
    c.gridx = 4;
    totalsPanel.add(totalTime, c);

    //Add scrollbars to our troop/spell panels so they can all fit in a reasonable window
    JScrollPane normalTroopScroll = new JScrollPane(normalTroopPanel);
    JScrollPane darkTroopScroll = new JScrollPane(darkTroopPanel);
    JScrollPane spellScroll = new JScrollPane(spellPanel);

    //Bundle it all up!
    c.gridx = 0;
    c.gridy = 0;
    c.gridheight = 2;
    armyEntryPanel.add(normalTroopScroll, c);
    c.gridx = 1;
    c.gridheight = 1;
    armyEntryPanel.add(darkTroopScroll, c);
    c.gridy = 1;
    armyEntryPanel.add(spellScroll, c);
    c.gridy = 2;
    c.gridx = 0;
    c.gridwidth = 2;
    armyEntryPanel.add(totalsPanel, c);
}

Answer 1

fill和weighty的组合导致了主要问题。

尝试为顶部的组件（滚动窗格）设置weighty到1，为底部的组件设置weighty到0。您也可以考虑将填充设置为NONE（对于底部组件）

基本上，你永远不会重置约束

Answer 2

我建议您根据屏幕分辨率，字体大小等对底部彩色面板进行preferredDimension。这样，它可以保持您希望它保持的方式。

另外，请尝试为这些组件设置Insets，看看是否有帮助。

新手GridBagLayout问题

2 个答案: