McBasic™Get McBasic™ ↗Left
Horizontal position in device-independent points.
Range: -100000 to 100000.
Sparkline
Plot a small sequence without turning it into a full chart.
Use it in a Form#
A sparkline communicates direction and shape. It needs surrounding context: what is measured and in what order. Preserve the ordering of samples, and test short or empty sequences before using live data.
Add Sparkline to its intended parent and name it sparklineSales for this example:
| Property | Example value |
|---|---|
Values | "12,18,16,25,22,31,28,40" |
Minimum | 0 |
Maximum | 50 |
Caption | "Weekly activity" |
ShowPoints | True |
Visible | True |
Enabled | True |
A complete handler from Forms/frmMain.bas. The linked lesson includes its surrounding controls, declarations and helpers.
Forms/frmMain.bas
Private Sub sparklineSales_Change()
lblHelp.Caption = "Weekly activity updated."
End SubProperties#
Contract defaults are shown below. Where a new control has a different Designer starting value, that value is listed separately.
Top
Vertical position in device-independent points.
Range: -100000 to 100000.
Width
Sparkline width in device-independent points.
Range: 0 to 100000.
Designer starting value: 300.
Height
Sparkline height in device-independent points.
Range: 0 to 100000.
Designer starting value: 84.
MinWidth
Minimum control width in device-independent points; 0 lets the parent layout choose.
Range: 0 to 100000.
MinHeight
Minimum control height in device-independent points; 0 lets the parent layout choose.
Range: 0 to 100000.
MaxWidth
Maximum control width in device-independent points.
Range: 0 to 100000.
MaxHeight
Maximum control height in device-independent points.
Range: 0 to 100000.
TabIndex
Keyboard navigation order.
Range: 0 to 100000.
ZIndex
Stacking order among sibling controls; larger values appear in front. Equal values preserve document order.
Range: -100000 to 100000.
Anchor
Edges kept at their authored distance when the parent resizes. Use a comma-separated combination of Left, Top, Right and Bottom; Dock overrides the effective anchor without deleting it.
Dock
Automatic placement within the parent: None, Left, Top, Right, Bottom or Fill. Dock overrides effective Anchor layout without deleting the stored anchors.
Margin
External spacing as one non-negative DIP value or Left,Top,Right,Bottom.
Visible
Whether the sparkline is shown.
Enabled
Whether the sparkline is enabled.
HitTestVisible
Whether the running control participates in pointer hit testing. The control remains selectable in the Designer.
AllowDrop
Whether this running control accepts application drag-and-drop operations; Designer movement is separate.
DragMode
VB control drag: 0 Manual (code starts a drag with the Drag method) or 1 Automatic (a left-button press starts a drag, and the control raises no Click, MouseDown or MouseUp for that press).
Range: 0 to 1.
DragIcon
Case-insensitive name of a declared project image resource shown under the pointer while this control is dragged; empty shows a grey outline of the control.
Values
Two to 256 finite invariant numbers separated by commas, whitespace, semicolons or newlines.
Minimum
Lowest value represented by the sparkline.
Range: -1000000000 to 1000000000.
Maximum
Highest value represented by the sparkline.
Range: -1000000000 to 1000000000.
Caption
Optional text displayed above the sparkline.
Designer starting value: "Sparkline".
ShowPoints
Displays a point marker at each value.
Font
Font as Family|Size or Family|Size|Regular/Bold|Normal/Italic, size 6–96 DIP. Empty uses the theme font.
ForeColor
Caption, line and point color as #RRGGBB. Empty uses the Form or theme color.
BackColor
Sparkline surface fill as #RRGGBB. Empty uses the theme fill.
AccessibleName
Name announced by assistive technology. Empty uses the stable control Name.
Cursor
Pointer shown over the control: Default, Arrow, Hand, IBeam, Cross, Wait, Help, SizeAll, SizeNS, SizeWE, SizeNWSE, SizeNESW or NotAllowed.
Opacity
Visual opacity from 0 (transparent) to 1 (opaque).
Range: 0 to 1.
DesignLocked
Prevents movement and resizing in the Designer without changing runtime interaction.
AccessibleDescription
Additional help text announced by assistive technology.
AccessibleRole
Accessibility role override. Auto preserves the native semantic role; explicit values use the corresponding platform automation role.
AutomationId
Stable automation identifier; empty uses the component Name.
ToolTipText
Help text shown when the pointer rests over the running control; empty disables the tooltip.
Tag
Application-defined text associated with this control; McBasic™ does not interpret it.
Index
Position of this control in its control array, 0 to 32767. Several controls share one name only when every one of them has an Index. Absent from the layout, and -1 in code, when the control is not in an array.
Designer values: 0 to 32767. Clear the dedicated Index row for a non-array control; BASIC then reads -1.
Events and parameters#
Replace control with the object’s Name when creating a handler. ByRef arguments may be changed by your handler; ByVal arguments report an input value.
Change
Occurs after the component value changes according to its McBasic™ change policy.
Signature — see the complete lesson for an implementation
Private Sub control_Change()No parameters.
DragEnter
Occurs when runtime drag data enters this control; set Effect to Copy, Move, Link or None.
Signature — see the complete lesson for an implementation
Private Sub control_DragEnter(ByVal Data As DragData, ByRef Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByRef |
X | Double | ByVal |
Y | Double | ByVal |
DragOver
Occurs while runtime drag data moves over this control; Effect may be updated for the current position.
Signature — see the complete lesson for an implementation
Private Sub control_DragOver(ByVal Data As DragData, ByRef Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByRef |
X | Double | ByVal |
Y | Double | ByVal |
DragOver
Occurs while a control dragged inside the app (DragMode or the Drag method) moves over this control: State is 0 when it enters, 2 while it moves over and 1 when it leaves; Source is the dragged control and X, Y are local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_DragOver(ByVal Source As Control, ByVal X As Single, ByVal Y As Single, ByVal State As Integer)| Parameter | Type | Direction |
|---|---|---|
Source | Control | ByVal |
X | Single | ByVal |
Y | Single | ByVal |
State | Integer | ByVal |
DragLeave
Occurs when runtime drag data leaves this control without a drop.
Signature — see the complete lesson for an implementation
Private Sub control_DragLeave()No parameters.
Drop
Occurs when runtime drag data is dropped on this control with a stable McBasic™ effect and local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_Drop(ByVal Data As DragData, ByVal Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
DragDrop
Occurs when a control dragged inside the app (DragMode or the Drag method) is released over this control; Source is the dragged control and X, Y are local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_DragDrop(ByVal Source As Control, ByVal X As Single, ByVal Y As Single)| Parameter | Type | Direction |
|---|---|---|
Source | Control | ByVal |
X | Single | ByVal |
Y | Single | ByVal |
MouseDown
Occurs when a pointing-device button is pressed over this control; Button is stable McBasic™ identity and X/Y are control-local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_MouseDown(ByVal Button As MouseButton, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButton | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
MouseUp
Occurs when a pointing-device button is released for this control; Button is stable McBasic™ identity and X/Y are control-local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_MouseUp(ByVal Button As MouseButton, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButton | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
MouseMove
Occurs when the pointer moves over the logical McBasic™ control; Button contains the currently held buttons and X/Y are local DIP coordinates.
Signature — see the complete lesson for an implementation
Private Sub control_MouseMove(ByVal Button As MouseButtons, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButtons | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
MouseEnter
Occurs once when the pointer enters the effective bounds of the logical McBasic™ control.
Signature — see the complete lesson for an implementation
Private Sub control_MouseEnter()No parameters.
MouseLeave
Occurs once when the pointer leaves the effective bounds of the logical McBasic™ control.
Signature — see the complete lesson for an implementation
Private Sub control_MouseLeave()No parameters.
DoubleClick
Occurs when native system timing recognizes a primary-button double activation on the same logical McBasic™ control.
Signature — see the complete lesson for an implementation
Private Sub control_DoubleClick()No parameters.
Methods#
No methods are declared in this component’s built-in metadata. Use its documented properties and events; do not infer APIs from a similarly named control in another framework.
Source baseline
20f4bfed6b · Build manifest