TelepathyQt4: Common debug support

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# Common debug support

## Functions

- void Tp::enableDebug (bool enable)
- void Tp::enableWarnings (bool enable)

## Detailed Description

TelepathyQt4 has an internal mechanism for displaying debugging output. It uses the Qt4 debugging subsystem, so if you want to redirect the messages, use qInstallMsgHandler() from <QtGlobal>.

Debugging output is divided into two categories: normal debug output and warning messages. Normal debug output results in the normal operation of the library, warning messages are output only when something goes wrong. Each category can be invidually enabled.

## Function Documentation

void Tp::enableDebug | ( | bool | enable | ) |

Enable or disable normal debug output from the library. If the library is not compiled with debug support enabled, this has no effect; no output is produced in any case.

The default is `false` ie. no debug output.

Parameters:

  | enable | Whether debug output should be enabled or not.

void Tp::enableWarnings | ( | bool | enable | ) |

Enable or disable warning output from the library. If the library is not compiled with debug support enabled, this has no effect; no output is produced in any case.

The default is `true` ie. warning output enabled.

Parameters:

  | enable | Whether warnings should be enabled or not.