我正在將我們的應用程序中的許多SWT標籤轉換爲文本小部件,因爲我們需要使我們的軟件更易於訪問。如果我們使用只讀文本小部件,屏幕閱讀器很難閱讀標籤值,但可以輕鬆進行。SWT佈局 - 無法在GridLayout中垂直居中Text小部件
將網格佈局中的多個標籤轉換爲只讀文本後,我們似乎無法使文本垂直居中。下面是一個簡單的計算器例子,我們看到了相同的行爲。我已經在GridData和Text上玩過SWT.CENTER,SWT.FILL,但似乎無法使控件垂直居中。
public void initUI() {
GridLayout g1 = new GridLayout(4, true);
g1.horizontalSpacing = 4;
g1.verticalSpacing = 4;
g1.marginBottom = 5;
g1.marginTop = 5;
shell.setLayout(g1);
String[] buttons = {
"Cls", "Bck", "", "Close", "7", "8", "9", "/", "4",
"5", "6", "*", "1", "2", "3", "-", "0", ".", "=", "+"
};
Text display = new Text(shell, SWT.SINGLE);
GridData gridData = new GridData();
gridData.horizontalSpan = 4;
gridData.horizontalAlignment = GridData.FILL;
display.setLayoutData(gridData);
for (int i = 0; i < buttons.length; i++) {
if (i == 2) {
Label lbl = new Label(shell, SWT.CENTER);
GridData gd = new GridData(SWT.FILL, SWT.FILL, false, false);
lbl.setLayoutData(gd);
} else {
Text btn = new Text(shell,SWT.SINGLE | SWT.READ_ONLY | SWT.BORDER);
btn.setText(buttons[i]);
GridData gd = new GridData(SWT.CENTER, SWT.CENTER, true, true);
gd.widthHint = 50;
gd.heightHint = 30;
btn.setLayoutData(gd);
btn.selectAll();
}
}
}