因此,我们正在尝试实施3个文本编辑区,让用户在我们的黑莓应用程序中输入他们的用户凭据。然而,当用户的名字比editfield框长时,我们遇到了麻烦(该字段必须位于一个框内,并且该框必须保持静止,文本必须水平滚动。)如何实现适当的Horizontal Scrollable Custom EditField?
这是我的自定义滚动条编辑字段类based on the scrollable edit field here:
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.component.EditField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
public class ScrollableEditField extends Manager {
private final static int DEFAULT_TOP_PADDING = 1;
private final static int DEFAULT_BOTTOM_PADDING = 1;
private final static int DEFAULT_LEFT_PADDING = 1;
private final static int DEFAULT_RIGHT_PADDING = 1;
private int TOTAL_VERTICAL_PADDING = DEFAULT_TOP_PADDING + DEFAULT_BOTTOM_PADDING;
private int TOTAL_HORIZONTAL_PADDDING = DEFAULT_LEFT_PADDING + DEFAULT_RIGHT_PADDING;
private int width = -1;
private int height = -1;
private HorizontalFieldManager hfm = new HorizontalFieldManager(HORIZONTAL_SCROLL);
private EditField ef;
public ScrollableEditField(String label, String initialValue, int maxNumChars, long innerEditFieldStyle) {
super(NO_HORIZONTAL_SCROLL);
ef = new EditField(label, initialValue, maxNumChars, innerEditFieldStyle);
hfm.add(ef);
add(hfm);
}
protected void sublayout(int width, int height) {
if (this.width != -1) {
width = this.width;
}
if (this.height != -1) {
height = this.height;
} else {
height = ef.getFont().getHeight();
}
layoutChild(hfm, width-TOTAL_HORIZONTAL_PADDDING, height-TOTAL_VERTICAL_PADDING);
setPositionChild(hfm, DEFAULT_LEFT_PADDING, DEFAULT_TOP_PADDING);
setExtent(width, height); // Maybe not..
}
public EditField getEditField() {
return ef;
}
public void setWidth(int width) {
this.width = width;
}
public void setHeight(int height) {
this.height = height;
}
protected void onFocus(int direction) {
super.onFocus(direction);
ef.setCursorPosition(0);
}
protected void onUnfocus() {
hfm.setHorizontalScroll(0);
super.onUnfocus();
}
};
这是我在我的代码使用这个类:
我把这些场为HorizontalFieldManager
,然后将一个网格单元内这个HFM(具有固定尺寸)。下面是几行字:
GridFieldManager gfm = new GridFieldManager(1, 2, 0);
gfm.setColumnProperty(0, GridFieldManager.FIXED_SIZE, Display.getWidth()* 1/5);
gfm.setColumnProperty(1, GridFieldManager.PREFERRED_SIZE_WITH_MAXIMUM, Display.getWidth()* 4/5);
HorizontalFieldManager hfm1e = new HorizontalFieldManager(USE_ALL_WIDTH|USE_ALL_HEIGHT);
ScrollableEditField sef1 = new ScrollableEditField("", "", 32, EditField.FILTER_EMAIL);
sef1.setWidth((Display.getWidth()* 4/5)-5);
sef1.setHeight(getFont().getHeight());
sef1.setBorder(BorderFactory.createRoundedBorder(new XYEdges(1,1,1,1)));
hfm1e.add(sef1);
gfm2.add(hfm1e);
那些最后几行只是在这里和那里采取从一个更大的类,但他们说明我想自定义编辑字段添加到GUI的方式。
现在由于某种原因,当我运行这段代码的时候,这个字段就在那里,我可以输入它,但是它就好像字段是一个字符宽,我看不到右边的任何东西,边界。任何人都可以帮助发现我做错了什么?
香蕉人!!! 。 – tipycalFlow 2012-03-30 08:39:35
我想你使用的是我在这里发布的'ScrollableEditField',http://stackoverflow.com/a/9524509/396949。如果您觉得它有用,请考虑提升它。 – mrvincenzo 2012-03-30 08:40:18