MyThemeTabTitleDrawProc

Draws a tab title.

Here's how to declare a tab title drawing function, if you were to name the function MyThemeTabTitleDrawProc :

pascal void MyThemeTabTitleDrawProc (
                     const Rect *bounds,
                     ThemeTabStyle style,
                     ThemeTabDirection direction,
                     SInt16 depth,
                     Boolean isColorDev,
                     UInt32 userData);

bounds

A pointer to a structure of type Rect . The rectangle you are passed is set to the area in which you should draw your tab title content. Your tab title drawing function is called clipped to the rectangle in which you are allowed to draw your content; do not draw outside this region.

style

A value of type ThemeTabStyle . You are passed a constant specifying the relative position (front or non-front) and state of the tab. See Theme Tab Style Constants for descriptions of possible values.

direction

A value of type ThemeTabDirection . You are passed a constant specifying the direction in which the tab is oriented. See Theme Tab Direction Constants for descriptions of possible values.

depth

A signed 16-bit value. You are passed the bit depth (in bits per pixel) of the current graphics port.

isColorDev

A value of type Boolean . If true , indicates that you are drawing on a color device; a value of false indicates a monochrome device.

userData

An unsigned 32-bit value. You are passed data specifying how to draw the tab title content, from the userData parameter of DrawThemeTab .

DISCUSSION

At the time your tab title drawing function is called, the foreground text color and mode is already set to draw in the correct state (active or inactive) and correct color for the theme. You do not need to set the color unless you have special drawing needs. If you do have special drawing needs, you should supply the depth value and the value of the isColorDevice parameter to the function IsThemeInColor to determine whether or not you should draw the tab title content in color. Note that the Appearance Manager calls your MyThemeTabTitleDrawProc function for every device that the bounds rectangle intersects.

SPECIAL CONSIDERATIONS

The Appearance Manager draws the tab background prior to calling your tab title drawing function, so you should not erase the tab background from your title drawing function.

VERSION NOTES

Available with Appearance Manager 1.1 and later.