CheckBox

Qualified name: delphifmx.CheckBox

class CheckBox

Bases: PresentedTextControl

Represents a FireMonkey styled check box that can be either on (selected) or off (cleared). TCheckBox represents a FireMonkey styled check box that can be either on (selected) or off (cleared). A TCheckBox component presents you an option. Select the box to turn on the option, or clear it to turn off the option. A FireMonkey TCheckBox control supports linking to a Boolean database field. The Boolean field can be null, so there are actually three states: True, False, Null. The TCheckBox control treats the Null state as False. The Text property can be used to define an accelerator key to a control. The accelerator key behavior for TCheckBox is to check and uncheck the box control.

Methods

ApplyStyleLookup	Gets and applies the style of a TStyledControl.
Inflate	Call this procedure to get and apply its style lookup.
KeyDown	Sends a PM_KEYDOWN message to the presentation layer through its presentation proxy when a key is pressed down while your presented control has the focus.
MouseDown	OnMouseDown event dispatcher.
MouseMove	OnMouseMove event dispatcher.
MouseUp	OnMouseUp event dispatcher.
NeedStyleLookup	Call this procedure to indicate that this control requires to get and apply its style lookup.
SetNewScene	Sets a new Scene for the current control.

Attributes

AbsoluteClipRect	Specifies the absolute rectangle of the control after all its parent controls clip it.
AbsoluteEnabled	Specifies whether the control is absolutely enabled.
AbsoluteHeight	Specifies the absolute height of the control.
AbsoluteMatrix	Specifies the absolute transformation matrix of the control.
AbsoluteOpacity	Specifies the absolute opacity of the control.
AbsoluteRect	Specifies the absolute rectangle that bounds the control.
AbsoluteScale	Specifies the absolute scale of the control.
AbsoluteWidth	Specifies the absolute width of the control.
Action	Specifies the action associated with the control.
ActionClient	Specifies whether the component object has an associated action.
AdjustSizeValue	Updates the width and height of this control according to its current style
AdjustType	Determines if and how the width and height of this control should be modified to take the fixed space dictated by the style of this control
Align	Specifies the alignment options (top, left, client, and so on) of this control.
Anchors	Specifies how the control is anchored to its parent.
ApplyingEffect	A flag that signals when a control is in the process of applying an effect.
AutoCapture	Specifies whether the control captures mouse events.
AutoTranslate	Specifies whether the control's text should be translated
AxisAlignedRect	A TRectF defined by the width and height of the control.
BoundsRect	Specifies the bounding rectangle of the control.
CanFocus	Specifies whether the current control can receive focus.
CanParentFocus	Specifies whether the parent of this control should be evaluated to receive focus.
Canvas	Provides the drawing surface of the control.
Children	Stores an array of children attached to this parent component.
ChildrenCount	Read-only property that specifies the number of children in the children list.
ChildrenRect	Specifies the bigger rectangle area occupied by parent and children controls.
ClassName	Returns the TObject.ClassName
ClipChildren	Specifies if children of the control should be clipped to the control's on-screen region.
ClipParent	Specifies whether the current control has clipped its parent.
ClipRect	Specifies the bound rectangle to be clipped.
ComObject	Specifies the interface reference implemented by the component.
ComponentCount	Returns the owned component count
ComponentIndex	Indicates the position of the component in its owner's Components property array.
ComponentState	Describes the current state of the component, indicating when a component needs to avoid certain actions.
ComponentStyle	Governs the behavior of the component.
Components	Returns an iterator over the owned components
ControlType	ControlType:
Controls	Returns an iterator over contained controls
ControlsCount	Returns the count of contained controls
Cursor	Image to use to represent the mouse pointer when it passes into the region covered by the control.
Data	Stores a Tvalue, which is a data structure that can store different kinds of data types.
DefaultSize	Embarcadero Technologies does not currently have any additional information.
DefaultStyleLookupName	Returns a string with the name of the default style of this control
DefaultTextSettings	Stores a TTextSettings type object that keeps the default values of the text representation properties.
DesignInfo	Contains information used by the Form designer.
DisableDisappear	Embarcadero Technologies does not currently have any additional information.
DisableFocusEffect	Specifies whether the control has the focus effect disabled.
DragMode	Specifies how the control initiates drag-and-drop operations.
EnableDragHighlight	Specifies whether the control is highlighted when the dragged object is over it.
Enabled	Specifies whether the control responds to mouse, keyboard, and timer events.
FixedSize	Embarcadero Technologies does not currently have any additional information.
Font	Specifies the font to use when displaying the text.
FontColor	Specifies the font color to use when displaying the text.
HasAfterPaintEffect	Specifies whether the control has an effect that is applied after the control is painted.
HasClipParent	Control that is a direct child of this control and has clipped this control.
HasDisablePaintEffect	Specifies whether the control's effect is painted.
HasEffect	Specifies whether the control has an applied effect.
Height	Height specifies the vertical size of the control (in dp).
HelpContext	Contains the numeric context ID that identifies the Help topic for the control.
HelpKeyword	Contains the keyword string that identifies the Help topic for the control.
HelpType	Specifies whether the control's context-sensitive Help topic is identified by a context ID or by keyword.
Hint	Specifies the text string that appears when the user moves the mouse over a control.
HitTest	Enables the control to capture mouse events.
InPaintTo	Specifies whether the control is currently being painted.
Index	Specifies the index of the child object in the children array attached to this object.
InheritedCursor	Image used to represent the mouse pointer when it passes into the region covered by the control.
InvertAbsoluteMatrix	Specifies the inverse matrix of AbsoluteMatrix.
IsChecked	Specifies whether the default state of this check box is selected or cleared.
IsDragOver	Specifies whether a dragged object is over the area of the current control.
IsFocused	Determines whether the control has input focus.
IsInflated	Whether the current style of this control has been actually applied to the control.
IsMouseOver	Specifies whether the mouse cursor is over the control.
IsPressed	Reads the pressed state of this check box.
IsVisible	Specifies whether the control is visible.
LocalRect	Specifies the local rectangle for painting the control.
Locked	Specifies whether the control is locked at design time.
Margins	Aligns the component to the margins points of other components.
Model	DataModel:
Name	Specifies the name of the component as referenced in code.
Observers	Indicates the TObservers object added to the TComponent.
OnCanFocus	Callable[[Object, bool], None]:
OnDragDrop	Callable[[Object, DragObject, PointF], None]:
OnDragEnter	Callable[[Object, DragObject, PointF], None]:
OnDragOver	Callable[[Object, DragObject, PointF, DragOperation], None]:
OnGesture	Callable[[Object, GestureEventInfo, bool], None]:
OnPaint	Callable[[Object, Canvas, RectF], None]:
OnPainting	Callable[[Object, Canvas, RectF], None]:
Opacity	Specifies the control opacity.
Owner	Returns the Component Owner
Padding	Aligns the component to the padding points of other components.
Parent	Returns/Sets the Control Visibility
ParentClassStyleLookupName	The name of the default style of the parent class of this control.
ParentControl	Specifies the parent control of this control.
ParentShowHint	If True, the value of the ShowHint property of this control inherits the value of the ShowHint property of the parent control.
ParentedRect	Specifies the bounding rectangle of the control within its parent.
ParentedVisible	Specifies whether all the control's parents are visible.
PopupMenu	Specifies the context (pop-up) menu object.
Position	Aligns the component to the position points of other components (Bounds points).
PrefixStyle	Determines whether the ampersand character (&) is considered as a special prefix character.
Presentation	Object:
PresentationProxy	PresentationProxy:
PresentationState	PresentationState:
Pressed	Indicates whether the control is currently pressed.
PressedPosition	A point that indicates where exactly on the control the click occured.
ResultingTextSettings	Keeps final values of text representation properties.
Root	Specifies the root parent of this object.
RotationAngle	Specifies the amount (in degrees) by which the control is rotated from the x-axis.
RotationCenter	Specifies the position of the pivot point of the control.
Scale	Specifies the scale of the control.
Scene	Specifies the current scene in which the control is drawn.
ShowHint	Specifies whether the Hint can be shown.
Size	Specifies the vertical and horizontal size (Size.Height and Size.Width) of the control (in pixels).
Stored	Specifies whether this object is stored in the .XFM file.
StyleLookup	Specifies the name of the resource object to which the current TStyledControl is linked
StyleName	Specifies the style name for this FMX component.
StyleState	This property allows you to define the current state of style
StyledSettings	Defines the set of styled text representation properties whose values are loaded from the current style and cannot be changed manually.
StylesData	Value:
TabOrder	Indicates the position of the control in its parent's tab order.
TabStop	Embarcadero Technologies does not currently have any additional information.
Tag	Stores a NativeInt integral value as a part of a component.
TagFloat	Custom property that stores any floating-point value.
TagObject	Custom property that stores any object value.
TagString	Custom property that stores any string value.
Text	Specifies the text that will be displayed over the surface of this control.
TextAlign	Specifies the horizontal alignment of the text in this control.
TextSettings	Keeps the values of styled text representation properties that are set in the Object Inspector or programmatically.
Touch	Specifies the touch manager component associated with the control.
TouchTargetExpansion	Set of optional pixel values you can specify to expand the touch target of a FireMonkey styled control.
Trimming	Specifies how the text is trimmed when it exceeds the edges of the text area in this control.
UpdateRect	Specifies the rectangle area of the control that needs to be updated.
VCLComObject	Represents information used internally by components that support COM.
VertTextAlign	Specifies the vertical alignment of the text in this control.
Visible	Specifies whether the component appears onscreen.
Width	Specifies the horizontal size of the control (in pixels).
WordWrap	Specifies whether to wrap the text inside the control when the text length exceeds the text area width.

Action

Specifies the action associated with the control. Action allows an application to centralize the response to user commands. When a control is associated with an action, the action determines the appropriate properties and events of the control (such as whether the control is enabled or how it responds to an OnClick event). If an object of the descendant from the TFmxObject class does not support actions, and when this object tries to assign a value to the Action property, the setter method for Action calls GetActionLinkClass that should return nil. In this case, attempting to set a value to the Action property raises the following exception:

StrEActionNoSuported = ‘Class %s does not support the action’

Type:

BasicAction

AdjustSizeValue

Updates the width and height of this control according to its current style

AdjustType

Determines if and how the width and height of this control should be modified to take the fixed space dictated by the style of this control

Align

Specifies the alignment options (top, left, client, and so on) of this control. Use Align to automatically set the alignment of the current control. Setting Align to a value different than None can affect the position, size (height and width), and anchors of the control. By default, Align is set to None. Descendants of TControl typically set the visibility and value for the Align property. For example, for TToolBar, Align defaults to TAlignLayout.Top. To see the possible values for Align and their visible effects over the control, see FMX.Types.TAlignLayout. Controls that have the Align or Anchors properties set can use a Scale that is different from the default (1,1), so that controls align together even when they have a custom scale.

Type:

AlignLayout

Anchors

Specifies how the control is anchored to its parent. Use Anchors to ensure that a control maintains its current position relative to the edges of its parent, even if the parent is resized. When its parent is resized, the control holds its position relative to the edges to which it is anchored. Anchors is enforced only when the parent control is resized. If a control is anchored to opposite edges at the same time, the control stretches horizontally or vertically to maintain constant the distance between the control edges and parent edges. If a control is anchored to all four edges of its parent, the control stretches in all directions. By default, a control is anchored to the top and left edges of its container (Anchors=[akTop,akLeft]). The automatic alignment may affect the anchors of a control. When Align is set to None, all the anchors are available. If Align is not None, the anchors affected by the automatic alignment are excluded. Changing the state of the anchors affected by the automatic alignment has no effect over the control. Controls that have the Align or Anchors properties set can use a Scale that is different from the default (1,1), so that controls align together even when they have a custom scale.

Type:

Anchors

ApplyStyleLookup()

Gets and applies the style of a TStyledControl.

AutoTranslate

Specifies whether the control’s text should be translated

CanFocus

Specifies whether the current control can receive focus. CanFocus is True if it can receive focus, and False otherwise. If it is set to False, the control cannot be selected when using the TAB key. A control can receive focus after it is created.

Type:

bool

CanParentFocus

Specifies whether the parent of this control should be evaluated to receive focus. CanParentFocus is True when the parent of this control should be evaluated to receive focus if this control cannot receive focus itself, and False otherwise.

Type:

bool

ClipChildren

Specifies if children of the control should be clipped to the control’s on-screen region. Set ClipChildren to

True if you want child controls to be clipped to the control’s on-screen region. False if you want child controls to be able to extend beyond the region of the parent control.

Type:

bool

ClipParent

Specifies whether the current control has clipped its parent. When ClipParent is True, TControl cuts off the portion of the parent that lies under the control when the control is painted by the Paint and Painting methods. Parts of the control that do not contain visible objects cut off holes in the parent’s image. ClipParent is ignored in PaintChildren and other painting methods. If one parent has more that one child control having ClipParent equals True, then only one of these child controls is painted with ClipParent equals True. Others child controls are painted as if ClipParent equals False.

Type:

bool

ControlType

ControlType:

Cursor

Image to use to represent the mouse pointer when it passes into the region covered by the control. Change the value of Cursor to provide feedback to the user when the mouse pointer enters the control. For a list of cursor constants, see System.UITypes Constants. The image representations of the cursor depend on the theme active on the current platform. If Cursor is set to the default cursor, this control might display a different cursor when the mouse pointer is over it. The actual cursor that this control displays is the cursor defined in InheritedCursor, a read-only property that is calculated based not only in the value of Cursor in this control, but also the value of Cursor in any ancestor of this control (parent, grand-parent, and so on until the parent form).

Type:

int

DefaultStyleLookupName

Returns a string with the name of the default style of this control

DisableFocusEffect

Specifies whether the control has the focus effect disabled. Set DisableFocusEffect to True so the control disables the effect applied when it receives focus. Usually, DisableFocusEffect for FireMonkey controls is False.

Type:

bool

DragMode

Specifies how the control initiates drag-and-drop operations. Use DragMode to control when the user can drag the control. Disable the drag-and-drop capability at run time by setting the DragMode property value to dmManual. Enable automatic dragging by setting DragMode to dmAutomatic.

Type:

DragMode

EnableDragHighlight

Specifies whether the control is highlighted when the dragged object is over it.

Type:

bool

Enabled

Specifies whether the control responds to mouse, keyboard, and timer events. Use Enabled to change the availability of the control to the user. To disable a control, set Enabled to False. Some disabled controls appear dimmed (for example: buttons, check boxes, labels), while others (container controls) simply lose their functionality without changing their appearance. If Enabled is set to False, the control ignores mouse, keyboard, and timer events. To re-enable a control, set Enabled to True. This property applies to all TControl descendants.

Type:

bool

Font

Specifies the font to use when displaying the text.

Type:

Font

Height

Height specifies the vertical size of the control (in dp). Use the Height property to read or change the height of the control.

Type:

float

HelpContext

Contains the numeric context ID that identifies the Help topic for the control. In case of a .chm Help file, you must symbolically map Context IDs of Help topics to numeric topic ID values in the [MAP] section of your project (.hhp) file. To enable Context ID-based context-sensitive Help for a control, set HelpType to htContext and set HelpContext to a numeric topic ID. A topic ID of 0 (default) means that no Help topic is provided for the control.

Type:

int

HelpKeyword

Contains the keyword string that identifies the Help topic for the control. To enable the keyword-based context-sensitive Help for a control, set the HelpType property to htKeyword and set HelpKeyword to a keyword string. No keyword (zero-length string, the default) means that no Help topic is provided for the control.

Type:

str

HelpType

Specifies whether the control’s context-sensitive Help topic is identified by a context ID or by keyword. If HelpType is htContext, the HelpContext property value identifies the control’s Help topic. If HelpType is htKeyword, the HelpKeyword property value identifies the control’s Help topic.

Type:

HelpType

Hint

Specifies the text string that appears when the user moves the mouse over a control. See Using Hints to Show Contextual Help in a FireMonkey Application for more information about hints.

Type:

str

HitTest

Enables the control to capture mouse events.

If you set HitTest to True, this control captures all mouse events. The example below shows the use of HitTest for an OnClick event. If you set HitTest to False, the mouse events will pass through this control, so that a control laid out behind this one receives the mouse events instead of this control. Note: The HitTest enables all mouse-related events, which also include the display of Hints and Hint-related events. For most controls, HitTest is True by default. However, this is not true for all the controls. For example, for TLabel and TPathLabel, HitTest is False by default; these two controls do not capture the mouse-related events unless you set HitTest to True.

Example of HitTest 1. On a form, place a TPanel component. 2. Inside the panel, place a TPathLabel component. 3. Implement the OnClick event for both the TPanel and the TPathLabel:

procedure TForm1.Panel1Click(Sender: TObject); begin

ShowMessage(‘OnClick event fired for TPanel’);

end;

procedure TForm1.PathLabel1Click(Sender: TObject); begin

ShowMessage(‘OnClick event fired for TPathLabel’);

end;

4. Set the TPathLabel HitTest property to False (this is the default setting). Run the application and click the label. The OnClick event is fired for the panel (not the label).

5. Set the TPathLabel HitTest property to True. Run the application and click the label. The OnClick event is fired for the TPathLabel.

Type:

bool

Inflate()

Call this procedure to get and apply its style lookup.

IsChecked

Specifies whether the default state of this check box is selected or cleared. Set the IsChecked property to True in order to force this check box’s default state to be selected. The check box becomes cleared once you click it again.

Type:

bool

IsPressed

Reads the pressed state of this check box. The IsPressed read-only property is True when this check box is pressed, False otherwise.

Type:

bool

KeyDown(Key: int, KeyChar: unicodechr(str), Shift: ShiftState) → None

Sends a PM_KEYDOWN message to the presentation layer through its presentation proxy when a key is pressed down while your presented control has the focus. FMX.StdCtrls.TCheckBox.KeyDown inherits from FMX.Controls.Presentation.TPresentedControl.KeyDown. All content below this line refers to FMX.Controls.Presentation.TPresentedControl.KeyDown. Sends a PM_KEYDOWN message to the presentation layer through its presentation proxy when a key is pressed down while your presented control has the focus. The message includes a TKeyInfo record that contains the data of the parameters (AKey, AKeyChar, AShift).

See Also

FMX.Controls.Presentation.TPresentedControl.PresentationProxy FMX.Presentation.Messages.TMessageSender.SendMessage FMX.Controls.Presentation.TKeyInfo FMX.Controls.TControl.KeyDown FMX.Forms.TCommonCustomForm.KeyDown FMX.Controls.Presentation.TPresentedControl.KeyUp

Locked

Specifies whether the control is locked at design time. A locked control prohibits to move the control at design time, all the other properties can be modified at design time. To lock the control, set Locked to True. By default, Locked is False, and the control can be modified at design time.

Type:

bool

Margins

Aligns the component to the margins points of other components. The Margins of a control are the distances (in pixels) from each edge (top, left, bottom, right) to another control within the same Parent or to the edge of its Parent. The Margins add space to the outer side of the control. It only applies for controls that do not use TAlignLayout None and the components are located to each other. If a margin is not 0, no other control will come closer to the control than the specified distance. If the distance from a Parent edge to the corresponding control edge is smaller than the specified Margins for that edge, the control is repositioned and resized, if necessary, to maintain the specified distance. If the Margins control has zero values, RAD Studio uses the default values (Left=4, Top=4, Right=4, Bottom=4). You can also set your own Margins values. It only applies to the IDE control’s guidelines, when you are dragging control. But if you use Align=Client (for example), it will use the specified values in Margins. The following image shows how Padding and Margins properties affect alignment, position, and size of controls.

Type:

Bounds

MouseDown(Button: MouseButton, Shift: ShiftState, X: float, Y: float) → None

OnMouseDown event dispatcher. FMX.StdCtrls.TCheckBox.MouseDown inherits from FMX.Controls.TControl.MouseDown. All content below this line refers to FMX.Controls.TControl.MouseDown. OnMouseDown event dispatcher. A control calls MouseDown in response to any of mouse-down messages, decoding the message parameters into the shift-key state and position, which it passes in the Shift, X, and Y parameters, respectively:

Button determines which mouse button is pressed: left, right, or middle. Shift indicates which shift keys–SHIFT, CTRL, ALT, and CMD (only for Mac)–were down when the user pressed the mouse button. X and Y are the pixel coordinates of the mouse pointer within the client area of the control. If Button is mbLeft, MouseDown sets PressedPosition as a TPointF(X,Y). Override the protected MouseDown method to provide other responses when a mouse button is down while the cursor is over the control.

MouseMove(Shift: ShiftState, X: float, Y: float) → None

OnMouseMove event dispatcher. FMX.StdCtrls.TCheckBox.MouseMove inherits from FMX.Controls.TControl.MouseMove. All content below this line refers to FMX.Controls.TControl.MouseMove. OnMouseMove event dispatcher. As the mouse cursor moves across a control, this method is called repeatedly. Each time it is called with the new coordinates that reflect the continuous path of the mouse cursor across the screen real estate covered by the control’s visual representation:

Shift indicates which shift keys–SHIFT, CTRL, ALT, and CMD (only for Mac)–were down when the mouse cursor is over the control. X and Y are the pixel coordinates of the mouse pointer within the client area of the control. Override the protected MouseMove method to provide other responses when the mouse cursor moves over the control.

MouseUp(Button: MouseButton, Shift: ShiftState, X: float, Y: float) → None

OnMouseUp event dispatcher. FMX.StdCtrls.TCheckBox.MouseUp inherits from FMX.Controls.TControl.MouseUp. All content below this line refers to FMX.Controls.TControl.MouseUp. OnMouseUp event dispatcher. A control calls MouseUp in response to any of mouse-up messages, decoding the message parameters into the shift-key state and position, which it passes in the Shift, X and Y parameters, respectively:

Button determines which mouse button was previously pressed: left, right, or middle. Shift indicates which shift keys–SHIFT, CTRL, ALT, and CMD (only for Mac)–were down when the pressed mouse button is released. X and Y are the pixel coordinates of the mouse pointer within the client area of the control. Override the protected MouseUp method to provide other responses when the mouse button previously pressed is released while the cursor is over the control.

NeedStyleLookup()

Call this procedure to indicate that this control requires to get and apply its style lookup.

OnCanFocus

Callable[[Object, bool], None]:

OnDragDrop

Callable[[Object, DragObject, PointF], None]:

OnDragEnter

Callable[[Object, DragObject, PointF], None]:

OnDragOver

Callable[[Object, DragObject, PointF, DragOperation], None]:

OnPaint

Callable[[Object, Canvas, RectF], None]:

OnPainting

Callable[[Object, Canvas, RectF], None]:

Opacity

Specifies the control opacity. Set Opacity to customize the transparency of the current control. Opacity takes values between 0 and 1. If Opacity is 1, the control is completely opaque; if it is 0, the control is completely transparent. The values over 1 are treated as 1, and the ones under 0 are treated as 0. Opacity applies to the control’s children.

Type:

float

Padding

Aligns the component to the padding points of other components. The Padding of a control specifies how close, in pixels, the control’s children can come to each of its edges (top, left, bottom, right). Padding adds space to the inner side of the control. The control’s children are repositioned and resized, if necessary, to maintain the Padding. If the Padding control has zero values, RAD Studio uses the default values (Left=4, Top=4, Right=4, Bottom=4). You can also set your own Padding values. The following image shows how Padding and Margins properties affect alignment, position, and size of controls.

Note: Padding constraints do not work for TScrollBox, TListBox, TTreeView, and TGrid based controls.

Type:

Bounds

ParentShowHint

If True, the value of the ShowHint property of this control inherits the value of the ShowHint property of the parent control. See Using Hints to Show Contextual Help in a FireMonkey Application - Enabling Hints for a Control for more information.

Type:

bool

PopupMenu

Specifies the context (pop-up) menu object. Use PopupMenu to set the context menu of the current control. The pop-up window is displayed when ShowContextMenu is called.

Type:

CustomPopupMenu

Position

Aligns the component to the position points of other components (Bounds points). Specifies the upper-left corner of the current control, relative to its parent. The Position can be affected by the Padding of its parent and the Margins of the control.

Type:

Position

RotationAngle

Specifies the amount (in degrees) by which the control is rotated from the x-axis. Positive angles correspond to clockwise rotation. For counterclockwise rotation, use negative values. To set the rotation center, use RotationCenter.

Type:

float

RotationCenter

Specifies the position of the pivot point of the control. The coordinates of the rotation center take values in the range from 0 through 1. The point with the coordinates (0,0) corresponds to the upper-left corner of the control, the point with the coordinates (1,1) corresponds to the lower-right corner of the control. The default center of rotation is (0.5, 0.5). Values outside of [0,0] and [1,1] can be clipped in some descendant classes. To set the rotation angle, use RotationAngle.

Type:

Position

Scale

Specifies the scale of the control. Set the Scale coordinates to specify the scale on each axis. The initial scale rate is 1 on each axis.

Note: Controls that have the Align or Anchors properties set can use a scale that is different from the default (1,1), so that controls align together even when they have a custom scale.

Type:

Position

SetNewScene(AScene: IScene) → None

Sets a new Scene for the current control. Sets a new Scene for the current control. FMX.StdCtrls.TCheckBox.SetNewScene inherits from FMX.Controls.TControl.SetNewScene. All content below this line refers to FMX.Controls.TControl.SetNewScene. Sets a new Scene for the current control. AScene specifies the new scene. If AScene is empty, SetNewScene does nothing. SetNewScene sets the same scene for the control’s children.

ShowHint

Specifies whether the Hint can be shown. If ShowHint is set to True, a Hint string is displayed when the user moves the mouse over the control.

Type:

bool

Size

Specifies the vertical and horizontal size (Size.Height and Size.Width) of the control (in pixels). Use the Size property to read or change the size of the control.

Type:

ControlSize

StyleLookup

Specifies the name of the resource object to which the current TStyledControl is linked

StyleState

This property allows you to define the current state of style

StyledSettings

Defines the set of styled text representation properties whose values are loaded from the current style and cannot be changed manually. Text representation properties are used as parameters for drawing texts in controls. The StyledSettings property is used in FMX controls such as TButton, TSpeedButton, TCheckBox, and others. Styles, for example Metropolis UI styles, define the default values of the text representation properties like font name, font size, word-wrapping, and others. The TTextSettings class define properties keeping values of the FontColor, TextAlign, VertTextAlign, Trimming, WordWrap, and Font (TFont.Family, TFont.Size, TFont.Style) elements defining visual parameters of a text representation. StyledSettings can contain the Family, Size, Style, FontColor, and Other values defined in TStyledSetting. The “Relation between TStyledSetting constants and TTextSettings properties” table shows which of the TStyledSetting constants control the handling of these TTextSettings text representation properties. Keep in mind that the values of all styled text representation properties listed in the StyledSettings are taken from a style and cannot be changed manually. For example, if you set a new value of the FontColor property of a TTextControl control, then the real updating of the font color takes place only if the StyledSettings property of this control does not contain TStyledSetting.FontColor. For more details, see the example in Setting Text Parameters in FireMonkey. To switch OFF a font property for a control, select the control in the Form Designer. In the Object Inspector, expand the StyledSettings property. Clear the check mark before the property. For example, the following figure shows a TButton control with Size turned OFF (for Button1) and ON (for Button2):

With StyledSettings you can also use the DefaultStyledSettings constant that defines the values of the styled properties that are taken from a style by default. Remember that the HorzAlign and VertAlign text representation properties stored in the TextSettings property of a control correspond to the TextAlign and VertTextAlign properties of the control.

Type:

StyledSettings

TabOrder

Indicates the position of the control in its parent’s tab order. TabOrder is the order in which child controls are visited when the user presses the TAB key. The control with the TabOrder value of 0 is the control that has the focus when the form first appears. Initially, the tab order is always the order in which the controls were added to the form. The first control added to the form has a TabOrder value of 0, the second is 1, the third is 2, and so on. Change this by changing the TabOrder property. Each control has a unique tab-order value within its parent. Assigning TabOrder a value greater than the number of controls contained in the parent control moves the control to the end of the tab order. The control does not take on the assigned value of TabOrder, but instead is given the number that ensures that the control is the last in the tab order.

Type:

int

TabStop

Embarcadero Technologies does not currently have any additional information.

Type:

bool

Text

Specifies the text that will be displayed over the surface of this control. In the Text property you can define an accelerator key. On Windows platforms, an accelerator key is shown as an underlined letter. To specify an accelerator key, precede an <accelerator_letter> with an ampersand & character. The letter after the ampersand appears underlined. For example, to set the S character as an accelerator key for a Save button, type &Save. On Windows platforms, accelerator keys enable the user to access controls pressing Alt+<accelerator_letter> key combination. When run on not Windows platforms, a single ampersand is simply stripped from the text. To show a single ampersand & character in a Text property specify doubled ampersand && characters.

Type:

str

TextAlign

Specifies the horizontal alignment of the text in this control. This property can take values of the TTextAlign enumeration.

Type:

TextAlign

TextSettings

Keeps the values of styled text representation properties that are set in the Object Inspector or programmatically. TextSettings references a TTextSettings type object that handles values of styled text representation properties that are set in the Object Inspector or programmatically. TextSettings references a TTextSettings type object, which handles styled text representation properties to be used for drawing texts in this control. TTextSettings type objects provide all styled text representation properties and methods to manage them. The styled text representation properties are FontColor, TextAlign, VertTextAlign, Trimming, WordWrap, and Font (TFont.Family, TFont.Size, and TFont.Style). TTextSettings objects provide both styled text representation properties, whose values are loaded from a style (specified in StyledSettings), so all other styled text representation properties, whose values can be set manually, and methods to manage these text representation properties. The text representation properties identified in StyledSettings are loaded from the style and cannot be set manually. Remember that the HorzAlign and VertAlign text representation properties stored in the TextSettings property of a control correspond to the TextAlign and VertTextAlign properties of the control.

Type:

TextSettings

TouchTargetExpansion

Set of optional pixel values you can specify to expand the touch target of a FireMonkey styled control. FMX.Controls.TControl.TouchTargetExpansion is a published property of all FireMonkey styled controls that support Touch. Defined as an FMX.Types.TBounds, TouchTargetExpansion takes four optional parameters representing the expansion of the four sides of the control in pixels (Bottom, Left, Right, Top). Each parameter specifies the size of an additional screen area that is to be treated as part of the touch target of the control. The following figure illustrates how TouchTargetExpansion expands the touch target for a FireMonkey control:

Type:

Bounds

Visible

Specifies whether the component appears onscreen. Use the Visible property to control the visibility of the control at run time. If Visible is True, the control appears. If Visible is False, the control is not visible.

Type:

bool

Width

Specifies the horizontal size of the control (in pixels). Use the Width property to read or change the width of the control.

Type:

float

WordWrap

Specifies whether to wrap the text inside the control when the text length exceeds the text area width.

Type:

bool