diff options
Diffstat (limited to 'examples/widgets/doc/src')
| -rw-r--r-- | examples/widgets/doc/src/wiggly.qdoc | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/examples/widgets/doc/src/wiggly.qdoc b/examples/widgets/doc/src/wiggly.qdoc index 2c7ea5db9e0..30a2a34f1b3 100644 --- a/examples/widgets/doc/src/wiggly.qdoc +++ b/examples/widgets/doc/src/wiggly.qdoc @@ -52,7 +52,7 @@ {QLineEdit::textChanged()}{textChanged()} signal to the wiggly widget's \c setText() slot to obtain the real time interaction with the wiggly widget. The widget's default text is "Hello - world!". + world!", with an emoji thrown in for fun. \section1 WigglyWidget Class Definition @@ -115,13 +115,16 @@ Each time the \c paintEvent() function is called, we create a QPainter object \c painter to draw the contents of the widget. - For each character in \c text, we determine the color and the - position on the wiggly line based on \c step. In addition, \c x - is incremented by the character's width. + Since we are going to paint the character symbols individually, we + extract the unique unicode code point for each character from \c + text, and convert it to a string \c symbol. For each \c symbol, we + determine the color and the position on the wiggly line based on + \c step and its \c offset from the start of the text. In addition, + \c x is incremented by the symbol's width. For simplicity, we assume that QFontMetrics::horizontalAdvance(\c text) returns the sum of the individual character advances - (QFontMetrics::horizontalAdvance(\c text[i])). In practice, this is not + (QFontMetrics::horizontalAdvance(\c symbol)). In practice, this is not always the case because QFontMetrics::horizontalAdvance(\c text) also takes into account the kerning between certain letters (e.g., 'A' and 'V'). The result is that the text isn't perfectly centered. You |