FastReport Engine: Der Report-Erzeuger: Unterschied zwischen den Versionen
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Version vom 21. Dezember 2015, 18:25 Uhr
1 Allgemeines
Die sog. FastReport-"Engine" ist der Kern von FastReport. Die Engine ist der Programmteil, der der report ausführt, also die Ausgabe erzeugt.
Die Enging stellt einige wichtige Funktionen und Variablen zur Verfügung, die man zur Ausführung von speziellen Aufgaben benutzen kann.
1.1 Eigenschaften
| Eigenschaft | Typ | Beschreibung |
|---|---|---|
| CurColumn | Integer | the index of the current column in a multi-columned report
a value can be assigned to this property. |
| CurX | Extended | the current print position on the X-axis
a value can be assigned to this property. |
| CurY | Extended | the current print position on the Y-axis
a value can be assigned to this property. |
| DoublePass | Boolean | equals “True” if the report is a two-pass one
analogous to Report.EngineOptions.DoublePass. |
| FinalPass | Boolean | equals “True” when in last pass of a two-pass report |
| PageHeight | Extended | printable region’s height, in pixels |
| PageWidth | Extended | printable region’s width, in pixels |
| StartDate, StartTime | TDateTime | time of report running, the same as the <Date> und |
| TotalPages | Integer | the number of pages in a report, the same as the < TotalPages> system variable the report should be a two-pass one, if this variable is used |
| SecondScriptcall | Boolean | flag returning 'repeat-call' status of an event (in some cases an event can be called repeatedly during grouping) if True then the script has already been called |
Methods:
Method Description procedure AddAnchor (const Text: String) adds “Text” to the list of anchors see more below procedure NewColumn creates a new column in a multi-column report after the last column a page break is automatically inserted procedure NewPage creates a new page (page break) procedure ShowBand (Band: TfrxBand) displays a band with a specified name after displaying the band the “CurY” position is automatically incremented function FreeSpace: Extended returns height of the white space left on page in pixels. function GetAnchorPage (const Text: String): Integer returns the page number where the specified anchor has been placed
