如何阻止 JFace 组合框在调整窗口大小时调整大小? [英] How to stop JFace combo box from re sizing on a window re size?

问题描述

我有一个 Java Eclipse RCP 程序，其中 JFace 组合框内有一个长字符串.现在，当我在同一个视图中时，组合框会在它上面附加一个滚动条以显示全名.但是一旦我重新调整应用程序窗口的大小，组合框就会自行伸展以容纳长字符串.

I have a Java Eclipse RCP program in which I have a a long string inside a JFace combobox. Now when I am in the same view,The combobox attaches a scroll over it to show the full name. but as soon as I re size the window of the application, the combobox stretches itself to accommodate the lengthy string.

如何使组合框保持相同的大小.即使在我调整窗口大小之后，它的大小也应该保持固定.这里有两个屏幕截图来演示这个问题.

How do i make the combobox stay the same size. Like the size of it should remain fixed even after I resize the window. Here are two screen shots to demonstrate the issue.

附言我使用的是一个 comboViewer，里面有一个 comboBox.

P.S. I am using a comboViewer and inside it a comboBox.

提前致谢.

推荐答案

如果您使用 GridLayout 和 GridData 作为布局，您可以在 >widthHint 字段来建议组合的宽度.

If you are using GridLayout and GridData as your layout you can specify a value in the widthHint field to suggest the width for the Combo.

GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);

data.widthHint = 100;

preferredResourceCombo.setLayoutData(data);

如果用户使用大字体，使用这样的固定值可能会导致问题.所以另一种计算宽度的方法是使用 Dialog.convertWidthInCharsToPixels:

Using a fixed value like this might cause problems if the user uses a large font. So an alternative way of calculating the width is to use Dialog.convertWidthInCharsToPixels:

GC gc = new GC(control);
gc.setFont(control.getFont());
FontMetrics fontMetrics = gc.getFontMetrics();
gc.dispose();

data.widthHint = Dialog.convertWidthInCharsToPixels(fontMetrics, charCount);

如果您的代码在 Dialog 中，您可以将其简化为:

If your code is in a Dialog you can simplify this to just:

data.widthHint = convertWidthInCharsToPixels(charCount);

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