如何设置 QComboBox 宽度以适合最大的项目? [英] How do I set the QComboBox width to fit the largest item?

问题描述

我有一个 QComboBox，我用 QString 填充:

I have a QComboBox that I fill with QString using:

comboBox->addItem(someString);

当我启动我的 GUI 应用程序时，QComboBox 的宽度总是 70，即使最小的项目要大得多.例如，如何将 QComboBox 的宽度动态设置为 comboBox 中最大的 QString?

When I start my GUI application the width of the QComboBox is always 70, even if the smallest item is much larger. How can I dynamically set the width of a QComboBox, for instance, to the largest QString within the comboBox?

经过进一步测试后，我找到了以下解决方案:

After some further testing I found the following solution:

// get the minimum width that fits the largest item.
int width = ui->sieveSizeComboBox->minimumSizeHint().width();
// set the ComboBoxe to that width.
ui->sieveSizeComboBox->setMinimumWidth(width);

推荐答案

Qt (4.6) 在线文档对 QComboBox 有这样的说法:

Qt (4.6) online documentation has this to say about QComboBox:

enum    SizeAdjustPolicy  { AdjustToContents, AdjustToContentsOnFirstShow, AdjustToMinimumContentsLength, AdjustToMinimumContentsLengthWithIcon }

我建议

1. 确保SizeAdjustPolicy被实际使用

将枚举设置为 AdjustToContents.正如您提到的 .ui 文件，我建议在 Designer 中执行此操作.通常，您的构造函数中根本不应该有任何与您在 Designer 中所做的事情有关的花哨的东西.

setting the enum to AdjustToContents. As you mention a .ui file I suggest doing that in Designer. Normally there shouldn't be anything fancy in your constructor at all concerning things you do in Designer.

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