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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

71 | Page

function GetCheckBoxState(ACol,ARow: Integer;var state: Boolean): Boolean;

function GetCheckBoxState(ACol,ARow: Integer;var state: TCheckBoxState):

Boolean;

function SetCheckBoxState(ACol,ARow: Integer;state: Boolean): Boolean;

function SetCheckBoxState(ACol,ARow: Integer;state: TCheckBoxState):

Boolean;

function ToggleCheckBox(ACol,ARow: Integer): Boolean;

procedure AddCheckBoxColumn(ACol: Integer);

procedure AddTriStateCheckBoxColumn (ACol: Integer);

procedure RemoveCheckBoxColumn(ACol: Integer);

Example: counting the number of checked checkboxes in a column

var

I,Num: integer;

State: Boolean;

begin

Num := 0;

for I := grid.FixedRows to grid.RowCount – 1 do

begin

if grid.GetCheckboxState(Col,I,State) then

if State then inc(Num);

end;

Example: alternative to count checked data checkboxes

Supposing the checkboxes have been added with grid.AddCheckBox(Col,Row,False,True);

var

I,Num: integer;

begin

Num := 0;

for I := grid.FixedRows to grid.RowCount – 1 do

begin

if grid.Cells[Col,I] = grid.CheckTrue then

inc(Num);

end;

Three events can be triggered from the checkbox, the OnCheckboxClick, OnCheckboxMouseUp and

the OnCheckBoxChange event. The OnCheckBoxChange event is triggered whenever the state of a

checkbox changes as a result from a click of the user on the grid. Note that the OnCheckBoxChange

event will also be triggered for each checkbox changing its state by a click on a column header

checkbox.

Sometimes, it is desirable to have a checkbox in a fixed column header cell that can immediately

check or uncheck all checkboxes in the column. It is easy to have this type of functionality in

TAdvStringGrid:

with AdvStringGrid1 do

Begin

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

72 | Page

Options := Options + [goEditing];

AddCheckBoxColumn(1);

AddCheckBox(1,0,false,false);

MouseActions.CheckAllCheck := true;

end;

Programmatically, the entire column of checkboxes can be checked or unchecked with the methods:

procedure CheckAll(Col: Integer);

procedure UnCheckAll(col: Integer);

Radiobuttongroups

To add a radiobuttongroup to the grid, a stringlist is used for the text associated with each

radiobutton. With the AddRadio and CreateRadio methods the same logic is applied to a stringlist

maintained by the grid and a stringlist maintained by the application as for a bitmap with the

AddBitmap and CreateBitmap methods. The direction of the radiobuttons in the grid cell is set with

the DirRadio parameter and can be horizontal (DirRadio = 0) or vertical (DirRadio = 1).

procedure AddRadio(ACol,ARow,DirRadio,IdxRadio: Integer; sl:TStrings);

function CreateRadio(ACol,ARow,DirRadio,IdxRadio: Integer): TStrings;

procedure RemoveRadio(ACol,ARow: Integer);

function IsRadio(ACol,ARow: Integer): Boolean;

function GetRadioIdx(ACol,ARow: Integer;var IdxRadio: Integer): Boolean;

function SetRadioIdx(ACol,ARow,IdxRadio: Integer): Boolean;

function GetRadioStrings(ACol,ARow: Integer): TStrings;

Example: adding radiobuttons maintained by the application

var

i:integer;

begin

radopt1 := TStringList.Create;

radopt1.Add('Delphi');

radopt1.Add('C++Builder');

radopt1.Add('JBuilder');

radopt2 := TStringList.Create;

radopt2.Add('Std');

radopt2.Add('Prof');

radopt2.Add('C/S');

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

73 | Page

with AdvStringGrid1 do

begin

for I := 1 to RowCount - 1 do

begin

AddRadio(1,i,0,-1,radopt1);

AddRadio(2,i,1,-1,radopt2);

end;

To get the radiobutton index, the GetRadioIdx can be used which returns in the RadioIdx parameter

the value of the selected radiobutton or -1 if no radiobutton is selected.

Example: getting the selected radiobutton

var

Idx: Integer;

if Grid.GetRadioIdx(2,3,idx) then

ShowMessage(‘Radiobutton ‘+inttostr(idx)+’ selected’);

The radiobuttongroups trigger two events : OnRadioClick and OnRadioMouseUp

RadioButton columns

Instead of having a radiogroup in a single cell, it is also possible to add a radiogroup in a column of

the grid. Following methods are provided to handle radio button groups in grid columns:

procedure AddRadioButton(ACol,ARow: integer; State:Boolean = false);

procedure AddRadioButtonGroup(ACol,ARow: integer; Group: TRadioButtonGroup;

State:Boolean = false);

procedure RemoveRadioButton(ACol,ARow: integer);

function HasRadioButton(ACol,ARow: integer): boolean;

function HasRadioButtonGroup(ACol,ARow: integer): boolean;

function IsRadioButtonChecked(ACol,ARow: integer): boolean;

function SetRadioButtonState(ACol, ARow: integer; State: boolean): boolean;

procedure AddRadioButtonColumn(ACol: integer);

procedure RemoveRadioButtonColumn(ACol: integer);

procedure SetRadioButtonColumnIndex(ACol, Index: integer);

function GetRadioButtonColumnIndex(ACol: integer): integer;

The radiobutton in a cell triggers the event : OnRadioButtonClick

In this sample code, two columns of 3 radiobutton cells are created:

procedure TForm1.FormCreate(Sender: TObject);

begin

AdvStringGrid1.Options := AdvStringGrid1.Options + [goEditing];

AdvStringGrid1.AddRadioButton(1,1,true);

AdvStringGrid1.AddRadioButton(1,2);

AdvStringGrid1.AddRadioButton(1,3);

AdvStringGrid1.Cells[1,1] := 'France';

AdvStringGrid1.Cells[1,2] := 'Germany';

AdvStringGrid1.Cells[1,3] := 'United Kingdom';

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

74 | Page

AdvStringGrid1.AddRadioButton(2,1,true);

AdvStringGrid1.AddRadioButton(2,2);

AdvStringGrid1.AddRadioButton(2,3);

AdvStringGrid1.Cells[2,1] := 'Paris';

AdvStringGrid1.Cells[2,2] := 'Berlin';

AdvStringGrid1.Cells[2,3] := 'London';

AdvStringGrid1.AutoSizeCol(1);

AdvStringGrid1.AutoSizeCol(2);

end;

To create small groups of cells that form a radiogroup, the method AddRadioButtonGroup can be

used. This method has an extra parameter with which it can be defined whether adjacent cells form

a row of radiobuttons or column of radiobuttons. Note that in groups each radiobutton remains

individually accessible and its state can be individually checked or unchecked.

This code snippet demonstrates how 3 groups of 2 radiobuttons can be created:

begin

AdvStringGrid1.AddRadioButtonGroup(1,1,rgRow);

AdvStringGrid1.AddRadioButtonGroup(2,1,rgRow);

AdvStringGrid1.Cells[1,1] := 'Group A1';

AdvStringGrid1.Cells[2,1] := 'Group A2';

AdvStringGrid1.AddRadioButtonGroup(4,1,rgRow);

AdvStringGrid1.AddRadioButtonGroup(5,1,rgRow);

AdvStringGrid1.Cells[4,1] := 'Group B1';

AdvStringGrid1.Cells[5,1] := 'Group B2';

AdvStringGrid1.AddRadioButtonGroup(3,4,rgCol);

AdvStringGrid1.AddRadioButtonGroup(3,5,rgCol);

AdvStringGrid1.Cells[3,4] := 'Group C1';

AdvStringGrid1.Cells[3,5] := 'Group C2';

end;

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

75 | Page

Button and BitButtons

Always visible buttons and buttons with a bitmap can be added to cells in the grid. The width and

height of these buttons can be set as well as the caption and/or glyph. This is achieved through

following methods:

procedure AddButton(ACol,ARow, bw, bh:

Integer;Caption:string;hal:TCellHalign;val:TCellValign);

procedure SetButtonText(ACol,ARow: Integer; Caption: string);

procedure PushButton(ACol,ARow: Integer;push: Boolean);

procedure RemoveButton(ACol,ARow: Integer);

function HasButton(ACol,ARow: Integer): Boolean;

procedure AddBitButton(ACol,ARow,bw,bh:Integer; Caption:string;

Glyph:TBitmap; hal:TCellHalign; val:TCellValign);

function CreateBitButton(ACol,ARow,bw,bh: Integer; Caption:string;

hal:TCellHalign; val:TCellValign): TBitmap;

Again the same approach for adding buttons with a bitmap maintained by the grid and one by the

application is provided with the AddBitButton and CreateBitButton method. For the first method

AddBitButton, the application needs to create, maintain and destroy the bitmap, for the

CreateBitButton method the grid creates, maintains and eventually destroys the bitmap.

The buttons fire the OnButtonClick event when clicked.

Note: by design, a button in a read-only cell is disabled. If this behavior is not desired, set

grid.ControlLook.NoDisabledButtonLook = True.

Expanding and collapsing rows

When cells contain more data than you want to have always visible, adding a row expand/collaps

button can be convenient. This is a small button in the top right corner of a cell. When clicked, it

will increase the row height, making more data visible and when clicked again, it reduces the row

height back to the normal height. Adding expand/collaps buttons in the grid is easy. Five functions

controls the expand/collaps behavior in the grid:

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

76 | Page

procedure AddExpandButton(ACol,ARow, ExpandedHeight: Integer);

function HasExpand(ACol,ARow: Integer): Boolean;

procedure RemoveExpand (ACol,ARow: Integer);

procedure ToggleExpand(ACol,ARow: Integer);

function GetExpandState(ACol,ARow: Integer): Boolean;

function GetExpandHeight(ACol,ARow:Integer; Expand:Boolean): Integer;

The AddExpandButton() function will add an expander button to a cell. The ExpandedHeight

parameter sets the height of the row in expanded state. The collapsed row height is by default the

height of the row before the row gets expanded. The function HasExpand() will return true when a

grid has such expand/collaps button and RemoveExpand() will remove any existing expand/collaps

button from the cell. ToggleExpand() will simply toggle the state of the row from collaps to expand

and vice versa. Finally, the function GetExpandState() will return true when the row is in expanded

state or false when not. The GetExpandHeight() function will return the height of an expanded row

when the Expand parameter is true and the normal height of the row when Expand parameter is

false.

Progressbars and ProgressPie

Two types of progress indicators can be displayed in a grid cell: a rectangular progress bar and a

circular pie type progress indicator. The AddProgress method provides two color parameters, one

for the zero to current position part of the progress bar and one for the current position to end part

of the bar. With the AddProgressEx method, additional color settings for font color in both parts is

possible. The progress bar fills the complete cell and as such the position of the progress bar

reflects a value between 0 and 100 set in the cell text.

procedure AddProgress(ACol,ARow: Integer;FGColor,BKColor: TColor);

procedure AddProgressEx(ACol,ARow:

Integer;FGColor,FGTextColor,BKColor,BKTextColor: TColor);

procedure AddProgressFormatted(ACol,ARow:

Integer;FGColor,FGTextColor,BKColor,BKTextColor: TColor; Fmt: string; Min,

Max: Integer);

procedure RemoveProgress(ACol,ARow: Integer);

procedure AddAdvProgress(ACol,ARow: Integer;Min:integer=0;Max:integer=100);

procedure RemoveAdvProgress(ACol,ARow: Integer);

Example: adding progressbar and setting position to 50

Grid.AddProgress(2,3,clRed,clWhite);

Grid.Ints[2,3] := 50;

A method is available AddProgressFormatted that allows to include the numeric formatting of the

value in the progressbar, as shown in this code snippet:

begin

AdvStringGrid1.AddProgressFormatted(1,1,clRed,clBlack,clInfoBk,clBlue,'%d

kb/sec',0,1000);

AdvStringGrid1.Ints[1,1] := 565;

end;

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TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

77 | Page

Adding an advanced progress bar:

Using grid.AddAdvProgress, it is possible to add a Windows themed style progressbar (available from

Windows XP or higher) with many additional options. The settings for the progressbar appearance

can be found under Grid.ProgressAppearance. This allows to have progressbars with colors

dependent on level of progress. This sample code adds three XP style progressbars to the grid with

default progress level color settings:

with AdvStringGrid1 do

begin

ProgressAppearance.CompletionSmooth := false;

AddAdvProgress(1,1);

Ints[1,1] := 50;

AddAdvProgress(1,2);

Ints[1,2] := 75;

AddAdvProgress(1,3);

Ints[1,3] := 91;

end;

The circular pie type progress bar allows a compact visual progress indication in a cell that can

contain text as well. The value of the progress pie is set with the method SetProgressPie.

procedure AddProgressPie(ACol,ARow: Integer; Color: TColor; Value:

Integer);

procedure SetProgressPie(ACol,ARow: Integer; Value: Integer);

procedure RemoveProgressPie(ACol,ARow: Integer);

Example: adding progress pie with text and position 25

Grid.AddProgressPie(2,3,clLime,25);

Grid.Cells[2,3] := ‘25% completion’;

The progress pie is always left aligned in the cell and before the optional text in the cell.

Note: the style of the progress bar is also affected by the ControlLook property. This is discussed in

detail for the ControlLook property.

Range Indicator

TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

78 | Page

A range indicator can show negative and positive ranges of value visually as bars in 2 different

colors, a color for negative range and a color for a positive range. The method to add a range

indicator is:

AddRangeIndicator(Col,Row,Range,NegColor,PosColor,ShowValue);

with:

Col,Row:

cell where to add range indicator

Range:

min/max boundaries of range, ie. From –Range to +Range (default 100)

NegColor:

color of negative range bar (default Red)

PosColor:

color of positive range bar (default Black)

ShowValue: when true shows value (default False)

Such range indicator is added with:

procedure TForm1.FormCreate(Sender: TObject);

var

i: integer;

begin

for i := 1 to AdvStringGrid1.RowCount - 1 do

begin

AdvStringGrid1.AddRangeIndicator(1,i,100,clRed,clGreen,false);

AdvStringGrid1.Ints[1,i] := -100 + Random(200);

end;

Balloons

A balloon appears when the mouse hovers over a cell. A balloon features 3 elements: a title, a text

and an icon. To add and remove balloons, following methods are available:

procedure AddBalloon(ACol,ARow: Integer; Title, Text:string; Icon:

TBalloonIcon);

procedure RemoveBalloon(ACol, ARow: integer);

function HasBalloon(ACol, ARow: integer): boolean;

function IsBalloon(ACol, ARow: integer; var Title, Text: string; var Icon:

TBalloonIcon): boolean;

TBalloonIcon is defined as:

biNone: no icon

biInfo: information icon

TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

79 | Page

biWarning: warning icon

biError: error icon

Adding a balloon can be done with:

procedure TForm2.FormCreate(Sender: TObject);

begin

AdvStringGrid1.Balloon.Enable := true;

AdvStringGrid1.AddBalloon(2,2,'Title A','Cell 2,2 is here', biError);

AdvStringGrid1.AddBalloon(3,3,'Title B','Cell 3,3 is here', biWarning);

end;

Note: in order to display a balloon, either via method AddBalloon or dynamically via the event

OnCellBalloon, grid.Balloon.Enable must be set to true. Further settings for the balloon tooltips are

available through grid.Balloon with properties:

AutoHideDelay: integer;

Sets the delay in milliseconds to auto hide the

balloon.

BackgroundColor: TColor;

Sets the background color of the balloon tooltip.

Enable: Boolean;

When true, displaying balloon tooltips is enabled.

InitialDelay: integer;

Sets the delay in milliseconds to wait before the

first balloon tooltip is shown.

ReshowDelay: integer;

Sets the delay in milliseconds to wait before a

new balloon tooltip is shown.

TextColor: TColor;

Sets the text color of the balloon tooltip.

Transparency: integer;

Sets the transparency of the balloon tooltip.

Shapes

Often it is desirable to have a little graphic representation and not having to resort to image

resources for this makes it easy to have graphics in many colours and many shapes in a resource

friendly way. The grid offers a range of such shapes that can be added via the method

grid.AddShape(ACol,ARow: integer; Shape: TCellShape; FillColor,LineColor: TColor; hal:

TCellHAlign; val: TCellVAlign);

The type TCellShape is defined in the unit AdvUtil and the supported shapes are:

TMS SOFTWARE

TADVSTRINGGRID

DEVELOPERS GUIDE

80 | Page

csRectangle

rectangular

csCircle

circle

csTriangleLeft

left oriented triangle

csTriangleRight

right oriented triangle

csTriangleUp

up oriented triangle

csTriangleDown

down oriented triangle

csDiamond

diamond shape

csLineVert

single vertical line

csLineHorz

single horizontal line

csRoundRect

rounded rectangle

csEllips

ellips

csSquare

square

csRoundSquare

rounded square

csStar

star

csArrowUp

arrow up

csArrowDown

arrow down

csArrowLeft

arrow left

csArrowRight

arrow right

csHalfStar

half star

To demonstrate this, following code adds 4 different shapes to the grid:

begin

AdvStringGrid1.AddShape(1,1,csDiamond,clLime, clSilver,

haBeforeText,vaTop);

AdvStringGrid1.AddShape(1,2,csCircle,clRed, clSilver,

haBeforeText,vaTop);

AdvStringGrid1.AddShape(1,3,csStar,clYellow, clSilver,

haBeforeText,vaTop);

AdvStringGrid1.AddShape(1,4,csArrowUp,clBlue, clSilver,

haBeforeText,vaTop);

end;

Rating control

As commonly seen in many web interfaces, the grid provides a specific graphic type to add a rating

control to a cell. The rating control consists of a number of star shapes. The number of fully or half

coloured stars represents the value. To add a rating control to a cell, call

grid.AddRating(ACol,ARow,Scale: integer; FullColor,EmtpyColor: TColor). The parameters

ACol,ARow set the cell where to add the rating control. The Scale parameter sets the number of

stars to use in the rating control and the parameters FullColor,EmptyColor set the color for fully

coloured stars and non coloured stars. When the grid cell is not read-only, the value of the rating

control can be change by clicking on the cell. The value can also be programmatically set and

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