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Recognition matrix. For example, this is a matrix of 2*3 (2 rows and 3 columns: Please wait until 3 1 4 then 2 5 0 then else Example of adding a matrix: Please refer to the following link for more information: when 1 9 then

A matrix rotation angle is associated with four data types: M11, M12, m21, and m22. The calculation formula is as follows: ┏ ┓ ┃ Cos (r) sin (r) 0 ┃-sin (r) Cos (r) 0 ┃ DX dy 1 ┃ ┗ ┛ // The r here is not the angle of the radian; The radian

Related attributes, methods, and functions: Igpimage. width; {width (in pixels)} igpimage. height; {height (in pixels)} igpimage. horizontalresolution; {obtain the horizontal resolution (in pixels/inches)} igpimage. verticalresolution;

Set the compoundarray attribute of the paint brush to obtain the composite paint brush. The corresponding type is igpcompoundarray (igpcompoundarray = igparray ). If the compound paint brush is composed of x lines, the array requires 2 x

Linejoin test: Linejoin TestCode: Uses gdiplus; Procedure tform1.formpaint (Sender: tobject); const PTS: array [0 .. 2] of tgppoint = (X: 90; Y: 80), (X: 240; Y: 30), (X: 240; Y: 80); var graphics: igpgraphics; pen: igppen;

// Add clientdataset1 and two buttons {initialize test data} procedure tform1.formcreate (Sender: tobject) in the form; begin with clientdataset1 do begin fielddefs. add ('id', ftinteger); fielddefs. add ('name', ftstring, 6); fielddefs. add ('age',

Uses xmldoc; Procedure tform1.formcreate (Sender: tobject); begin with clientdataset1 do begin fielddefs. add ('text', ftstring, 12); fielddefs. add ('num', ftinteger); createdataset; appendrecord (['abc', 123]); end; memo1.text: = formatxmldata

The array field (ftarray) is similar to the ADT field (the design process is the same). When defining an array field, you only need to define one element to describe the element type. In this example, the effects of true and false objectview are

I wanted to learn tclientdataset in May 2009, but I couldn't learn it at the time. Now I have a good idea. I have the source code (dbclient. Pas ). I hope that I can learn more about the memory coordination mode and learn about the database by

Put a bitbtn1 in the form and set the value of its property kind to bkclose. Then run it to see... The result is: not only the title and icon are automatically changed, but the window is closed. To be honest, I didn't know this small feature

Major members include: iregex, icapture, imatch, imatchcollection, igroup, and igroupcollection. First look: icapture; common imatch and igroup are inherited from it; as an underlying interface, they are generally not directly used.It provides

Tiff and GIF are multi-frame images. gif can also be associated with time to form an animation. The following two common values are used in the process of encoding or decoding multi-frame images:Framedimensionpage (For TIFF)Framedimensiontime

These infrastructures include tgpsize, tgpsizef, tgppoint, tgppointf, tgprect, and tgprectf. They provide some convenient functions.CodeMore streamlined. Convenient functions of tgppoint or tgppointf: 1. Because the add and subtract

Methods: 1. Filter and filtered 2. onfilterrecord 3. setrange, applyrange, setrangestart, setrangeend, and applyrange (Range: cancelrange, editrangestart, editrangeend, keyexclusive, and ranged) Before the test, we need to place clientdataset1,

Grouping statistics implemented during design: Running grouping statistics: // You only need to add clientdataset1, performance1, and dbgrid1 in the early stage; events only need to associate the oncreateunit unit1 of the form;

When I read image data from tclientdataset for the first time, I found that it is not an image! It is found that the first eight bytes are added (the first four bytes are 01 00 01, and the estimated size is the format identifier and header size;

Igpprivatefontcollection. addfontfile: loads the font from the file; Igpprivatefontcollection. addmemoryfont: loads fonts from memory Addfontfile test: Uses gdiplus; function getfontsdirectory: string; var Len: integer; Buf: array [0 .. MAX_PATH-

You can use igpcustomlinecap and igpadjustablearrowcap to customize the line cap. The latter inherits from the former and is used to modify the arrow caps. Igpadjustablearrowcap test: Igpadjustablearrowcap test code: uses GdiPlus;procedure

DrawLine();DrawLines();DrawArc();DrawBezier();DrawBeziers();DrawRectangle();DrawRectangles();DrawEllipse();DrawPie();DrawPolygon();DrawCurve();DrawClosedCurve();FillRectangle();FillRectangles();FillPolygon();FillEllipse();FillPie();FillClosedCurve();

This example uses: Tclientdataset. fields []; {field set; it has more functions than fieldlist, such as obtaining nested fields} tclientdataset. fieldlist []; {field list; it is lighter than fields, and it is faster if it is just a value}