Class tthreadcomp
Unit
Declaration
type tthreadcomp = class(tactcomponent)
Description
Runs onexecute in a separate thread, so the main event loop (and the user interface) stays responsive during a long operation. onexecute must poll sender.terminated itself and return when it becomes True, e.g. while not sender.terminated do begin ... end; — terminate only requests termination, it does not stop the thread by itself. To access widgets or other main-thread data from onexecute, wrap the access in application.lock/ application.unlock. To close a form once its worker thread is done, call release (not free) on the form from onterminate. Killing a thread outright (via the underlying thread.kill) can lose resources and should only be used as a last resort.
Hierarchy
- TObject
- tpersistent
- tcomponent
- tmsecomponent
- tactcomponent
- tthreadcomp
Overview
Methods
| Protected | procedure setactive(const Value: boolean); override; |
| Protected | procedure loaded; override; |
| Public | constructor create(aowner: tcomponent); override; |
| Public | destructor destroy; override; |
| Public | procedure run(const adatapo: pointer = nil); |
| Public | procedure terminate; |
| Public | procedure waitfor; |
| Public | function lock: boolean; |
| Public | procedure unlock; |
| Public | procedure postevent(event: tmseevent); |
| Public | function waitevent(const timeoutus: integer = -1): tmseevent; |
Properties
| Public | property datapo: pointer read fdatapo; |
| Public | property thread: teventthread read getthread; |
| Public | property terminated: boolean read getterminated; |
| Published | property options: threadcompoptionsty read foptions write foptions default []; |
| Published | property stacksizekb: integer read fstacksizekb write fstacksizekb default 0; |
| Published | property active: boolean read getactive write setactive default false; |
| Published | property onstart: threadcompeventty read fonstart write fonstart; |
| Published | property onexecute: threadcompeventty read fonexecute write fonexecute; |
| Published | property onterminate: threadcompeventty read fonterminate write fonterminate; |
| Published | property onterminated: threadcompeventty read fonterminated write fonterminated; |
Description
Methods
| Protected | procedure setactive(const Value: boolean); override; |
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This item has no description. | |
| Protected | procedure loaded; override; |
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This item has no description. | |
| Public | constructor create(aowner: tcomponent); override; |
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This item has no description. | |
| Public | destructor destroy; override; |
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This item has no description. | |
| Public | procedure run(const adatapo: pointer = nil); |
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| Public | procedure terminate; |
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| Public | procedure waitfor; |
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| Public | function lock: boolean; |
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| Public | procedure unlock; |
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| Public | procedure postevent(event: tmseevent); |
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| Public | function waitevent(const timeoutus: integer = -1): tmseevent; |
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Properties
| Public | property datapo: pointer read fdatapo; |
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| Public | property thread: teventthread read getthread; |
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| Public | property terminated: boolean read getterminated; |
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| Published | property options: threadcompoptionsty read foptions write foptions default []; |
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| Published | property stacksizekb: integer read fstacksizekb write fstacksizekb default 0; |
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| Published | property active: boolean read getactive write setactive default false; |
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| Published | property onstart: threadcompeventty read fonstart write fonstart; |
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| Published | property onexecute: threadcompeventty read fonexecute write fonexecute; |
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| Published | property onterminate: threadcompeventty read fonterminate write fonterminate; |
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| Published | property onterminated: threadcompeventty read fonterminated write fonterminated; |
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