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Diffstat (limited to 'doc/src/examples/scribble.qdoc')
| -rw-r--r-- | doc/src/examples/scribble.qdoc | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/doc/src/examples/scribble.qdoc b/doc/src/examples/scribble.qdoc index d9386843a5..5d801bf9cc 100644 --- a/doc/src/examples/scribble.qdoc +++ b/doc/src/examples/scribble.qdoc @@ -55,9 +55,9 @@ The example consists of two classes: \list - \o \c ScribbleArea is a custom widget that displays a QImage and + \li \c ScribbleArea is a custom widget that displays a QImage and allows to the user to draw on it. - \o \c MainWindow provides a menu above the \c ScribbleArea. + \li \c MainWindow provides a menu above the \c ScribbleArea. \endlist We will start by reviewing the \c ScribbleArea class. Then we will @@ -85,14 +85,14 @@ We also need the following private variables: \list - \o \c modified is \c true if there are unsaved + \li \c modified is \c true if there are unsaved changes to the image displayed in the scribble area. - \o \c scribbling is \c true while the user is pressing + \li \c scribbling is \c true while the user is pressing the left mouse button within the scribble area. - \o \c penWidth and \c penColor hold the currently + \li \c penWidth and \c penColor hold the currently set width and color for the pen used in the application. - \o \c image stores the image drawn by the user. - \o \c lastPoint holds the position of the cursor at the last + \li \c image stores the image drawn by the user. + \li \c lastPoint holds the position of the cursor at the last mouse press or mouse move event. \endlist @@ -176,18 +176,18 @@ good reasons for this: \list - \o The window system requires us to be able to redraw the widget + \li The window system requires us to be able to redraw the widget \e{at any time}. For example, if the window is minimized and restored, the window system might have forgotten the contents of the widget and send us a paint event. In other words, we can't rely on the window system to remember our image. - \o Qt normally doesn't allow us to paint outside of \c + \li Qt normally doesn't allow us to paint outside of \c paintEvent(). In particular, we can't paint from the mouse event handlers. (This behavior can be changed using the Qt::WA_PaintOnScreen widget attribute, though.) - \o If initialized properly, a QImage is guaranteed to use 8-bit + \li If initialized properly, a QImage is guaranteed to use 8-bit for each color channel (red, green, blue, and alpha), whereas a QWidget might have a lower color depth, depending on the monitor configuration. This means that if we load a 24-bit or |