13.11. Screen Information
13.11.1. Screen Name
$name = $widget->screen;
The name returned will be formatted as "displayName.screenIndex". For more details refer to Chapter 11, " Frame, MainWindow,and Toplevel Widgets".
13.11.2. Screen Height and Width
The screen height and width is really just the resolution of the screen. Sometimes you might need information to determine how large a window can fit on a user's display. To get the height and width of the screen in pixels, use the screenheight and screenwidth methods:
$height = $widget->screenheight; $width = $widget->screenwidth;
$heightmm = $widget->screenmmheight; $widthmm = $widget->screenmmwidth;
The same resolution, 1024x768, returns 203 millimeters as the height and 270 millimeters as the width.
13.11.3. Cell Count
$count = $widget->screencells;
13.11.4. Screen Depth
$depth = $widget->screendepth;
13.11.5. Color Type
The type of color is defined by one of the following classes: "directcolor", "grayscale", "pseudocolor", "staticcolor", "staticgray", or "truecolor". To determine the class for the screen that contains the widget, use screenvisual:
$type = $widget->screenvisual;
$type = $widget->visual;
$xid = $widget->visualid;
@list = $widget->visualsavailable
Each element in @list describes the visual and the color depth for that visual. For instance, you might see:
pseudocolor 8 directcolor 8 grayscale 8 staticcolor 8 truecolor 8 staticgray 8
13.11.6. Server Type
$server_type = $widget->server;
An older Win32 machine has a server type of "Windows 4.0 67109975 Win32". Regardless, this information is generally inconsistent, if not incorrect, so treat it as suspect data.
13.11.7. Is the Widget Viewable?
$isviewable = $widget->viewable;
viewable returns 1 if the widget can be viewed and if not.
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