Blackberry - 如何使用复选框在 ListField 中进行文本换行？

发布于 2024-08-12 23:47:21 字数 2187 浏览 7 评论 0原文

我正在创建一个带有复选框的 ListField 如何 - 创建带有复选框的 ListField
但我不知道如何在该 ListField 中将文本换行。
我提到了线程列表字段项中文本的文本换行

这里写为

如果您显示的只是文本，那么我会采用 rab 建议的方法。

我仅在 ListField 中显示文本，如果它不适合设备屏幕，我想将其换行。
但我没有得到“rab 建议的方法”，其中如何计算？

String[]linesToDraw = 根据行宽计算行数

我被困在这个问题上，所以关于这个问题的任何细节？

按照你的逻辑，我知道

* split text on words
* create string array and while words array not empty do
      o create string lineStr
      o while getFont().getAdvance(lineStr+" "+words[i]) < row width move words[i] to lineStr

我正在这样做

if(getFont().getAdvance(lineStr+" "+words[i]) < Display.getWidth())
{
    lineStr += words[i];
}

&我将 lineStr 存储在 VectorlinesToDraw 中，与我用于存储下一行文本的 lineStr 相同。

&最后我正在做绘图，

for (int i = 0; i < linesToDraw.size(); i++)
{ 
          String textToDraw = (String)linesToDraw.elementAt(i);
          graphics.drawText(textToDraw, 0, y, 0, w);
          y += fontHeight;
}

但如何计算没有。一行的行&行高？

这样，有了这个行高，我就可以编写 setRowHeight(rowHeight) ，因为不同行的行高不同。

我得到了没有。根据行宽和行数正确排列行将其存储在 Vector & 中我

int fontHeight = this.getFont().getHeight();

     for (int i = 0; i < linesToDraw .size(); i++)
    {           
        textToDraw = (String)linesToDraw.elementAt(i);
        graphics.drawText(textToDraw, xpos, ypos, 0 , width);
        ypos += fontHeight;
    }

现在正在绘制线条，但在前一条上，默认情况下 listField.setRowHeight() 仅占用一行。如果有 r 2 行，那么我在 drawListRow() 中写入 setRowHeight(getFont().getHeight()*2) 但随后它会进入循环

如果我在创建 ListField 时写入 setRowHeight() 那么它会正常显示，但对于所有行，行高相同已设置。

我得到要在运行时绘制的字符串&行高对于不同的行应该是可变的，那么我如何使用什么参数来 setRowHeight() ？用哪种方法？

原文

I m creating a ListField with Checkboxes from How To - Create a ListField with check boxes
But I m not getting how to wrap Text in a row in that ListField.
I referred the thread
Text Wrapping for text in List Field items

Here its written as

If all you are displaying is text, then I would go with the approach suggested by rab.

I m displaying Text only in ListField which I want to wrap if it doesnt fit within device screen.
But i m not getting "approach suggested by rab" in which How to calculate?

String [] linesToDraw = calculate the number of lines depending on the row width

I m stucked at this so any details on this issue ?

With ur logic I got

* split text on words
* create string array and while words array not empty do
      o create string lineStr
      o while getFont().getAdvance(lineStr+" "+words[i]) < row width move words[i] to lineStr

I m doing it like

if(getFont().getAdvance(lineStr+" "+words[i]) < Display.getWidth())
{
    lineStr += words[i];
}

& I m storing lineStr in a Vector linesToDraw as the same lineStr I m using for storing text of next row.

& in the end for drawing I m doing

for (int i = 0; i < linesToDraw.size(); i++)
{ 
          String textToDraw = (String)linesToDraw.elementAt(i);
          graphics.drawText(textToDraw, 0, y, 0, w);
          y += fontHeight;
}

but how to calculate no. of lines of a row & row height?

so that with this row height I can write setRowHeight(rowHeight) as the row height is different for different rows.

I got the no. of lines properly according to row width & stored it in a Vector & i m doing

int fontHeight = this.getFont().getHeight();

     for (int i = 0; i < linesToDraw .size(); i++)
    {           
        textToDraw = (String)linesToDraw.elementAt(i);
        graphics.drawText(textToDraw, xpos, ypos, 0 , width);
        ypos += fontHeight;
    }

now its drawing the lines but over the previous one as by default listField.setRowHeight() is taking only one row. If there r 2 rows then I write setRowHeight(getFont().getHeight()*2) in drawListRow() but then it goes in loop

If I write setRowHeight() while creating ListField then it comes properly but for all rows same row height is set.

I gets the String to draw at Runtime & the row height should be variable for different rows then how can I setRowHeight() with what parameter & in which method ?

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