Adding the label to the document influences the selected font (keyword:
inheritance). So it is quite logical that the size depends on that.
Sebastian
dperez schrieb:
> Very interesting this test from the Firebug Console:
>
> Test 1:
>
> new qx.ui.basic.Label('david')._computePreferredInnerWidth()==38
>
> Test 2:
>
> var et = new qx.ui.basic.Label('david');
> et.setLocation(200,200);
> et.setZIndex(1000);
> et.addToDocument()
> et.setBackgroundColor('#ff0')
> et._computePreferredInnerWidth()==26
>
>
> Conclusion: the value reported depends on if the label has been added or
> not.
>
> Is this normal?
>
> Relevant source code of Label.js:
>
> _computeObjectNeededDimensions : function()
> {
> // get node
> var element = this.self(arguments)._getMeasureNode();
> var style = element.style;
>
> // sync styles
> var source = this._styleProperties;
> style.fontFamily = source.fontFamily || "";
> style.fontSize = source.fontSize || "";
> style.fontWeight = source.fontWeight || "";
> style.fontStyle = source.fontStyle || "";
>
> // apply html
> if (this._isHtml)
> {
> element.innerHTML = this._content;
> }
> else
> {
> element.innerHTML = "";
> qx.dom.Element.setTextContent(element, this._content);
> }
>
> // store values
> this._cachedPreferredInnerWidth = element.scrollWidth;
> this._cachedPreferredInnerHeight = element.scrollHeight;
> },
>
> _computePreferredInnerWidth : function()
> {
> this._computeObjectNeededDimensions();
> return this._cachedPreferredInnerWidth;
> },
>
>
>
> dperez wrote:
>> Hi,
>>
>> In qooxdoo 0.6.6 I used to use this code for measuring the width of text:
>>
>> (new qx.ui.basic.Label('My text')).getPreferredBoxWidth()
>>
>> In qooxdoo 0.7, I receive very high values. For instance for a label
>> whose measured real width is 170 pixels, a value of 240 is returned.
>>
>> What may be the cause of this inaccuracy?
>> Is this the best method of measuring width of text?
>>
>> Thanx for any answer.
>>
>> Regards,
>> David
>>
>
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