The Button component implements a standard Windows button.
Generally, the Button component is used to initiate some events.
In the button text (the Text property) one can implement hotkeys; to do this, select one of the text characters by inserting an ampersand "&" before it. This character is not displayed in the button text, and the next character is underlined. As a result, the user can press ALT + <клавиша выделенного символа> the key of the selected character instead of clicking the button.
The main event of a button is OnClick, which occurs when the user clicks this button. In the handler of this event you can include a set of operators, which must be executed when the user clicks the button. The ImageButton component grants wider options for setting appearance.
Property name | Brief description | |
Align | The Align property determines component's behavior on resizing its parent component. | |
AllowDrag | The AllowDrag property determines whether an object can be dragged from the component. | |
AllowDrop | The AllowDrop property determines whether the component can accept a dragged object. | |
Anchors | The Anchors property returns settings that determine the percentage of the size change for the current component when the parent component is resized. | |
Brush | The Brush property determines the brush that is used to fill component area. | |
CancelButton | The CancelButton property determines whether the OnClick event is handled on clicking the ESC button. | |
ClientHeight | The ClientHeight property is used to receive or specify the height of the component’s client area. | |
ClientWidth | The ClientWidth property is used to receive or specify the width of the component’s client area. | |
Color | The Color property determines a component background color. | |
ComponentCount | The ComponentCount property returns the number of child components. | |
Components | The Components property returns the child component. | |
Cursor | The Cursor property determines the look of the cursor over the component. | |
Data | The Data property is used to store any custom data. | |
DefaultButton | The DefaultButton property determines that pressing the ENTER key is equivalent to clicking this button. | |
Enabled | The Enabled property determines whether the component is available for the user. | |
Focused | The Focused property returns True if the focus is set on the component. | |
Font | The Font property determines the set of characteristics describing the font that is used to display text. | |
Height | The Height property determines component height. | |
HelpContext | The HelpContext property determines a unique index for the context help section for this component. | |
Hint | The Hint property determines a component tooltip text. | |
Left | The Left property determines the coordinate of the left border of the component. | |
ModalResult | The ModalResult property determines the result returned after clicking the button on the modal form on closing this form. | |
Name | The Name property determines a component name. | |
Parent | The Parent property determines a parent component. | |
ParentColor | The ParentColor property determines whether the component inherits the color of the parent component. | |
ParentFont | The ParentFont property determines whether the component uses the font of the parent component. | |
ParentShowHint | The ParentShowHint property determines whether a tooltip is displayed. | |
PopupMenu | The PopupMenu property determines context menu, which opens on right-clicking the component. | |
Scrolls | The Scrolls property returns parameters of component's scrollbars. | |
ShowHint | The ShowHint property enables and disables showing a component tooltip. | |
TabOrder | The TabOrder property determines the component position in the tab order. | |
TabStop | The TabStop property determines whether the component gets focused when the TAB button is pressed. | |
Tag | The Tag property is not used by the compiler. The user can change the value of the Tag property and use it as he wishes. | |
Text | The Text property determines the row identifying a component for the user. | |
Top | The Top property determines the coordinate of the top border of the component. | |
Visible | The Visible property determines visibility of the component during execution. | |
Width | The Width property determines component width. |
Method name | Brief description | |
BringToFront | The BringToFront method brings a component to front. | |
ClientToScreen | The ClientToScreen method converts the coordinates of a point specified relative to the component coordinate system into screen coordinates. | |
DoDragDrop | The DoDragDrop method enables the user to start dragging operation. | |
GetImage | The GetImage method returns the image of the component with all the child components. | |
ScreenToClient | The ScreenToClient method converts screen coordinates of a point into coordinates specified relative to the component coordinate system. | |
SendToBack | The SendToBack method sends a component to back. | |
SetFocus | The SetFocus method sets focus to this component. |
Event name | Brief description | |
OnBeginDrag | The OnBeginDrag event occurs for a component when the user starts to drag an object from the component. | |
OnClick | The OnClick event occurs if the user clicks the component area. | |
OnDblClick | The OnDblClick event occurs if the user double-clicks the component area. | |
OnDragDrop | The OnDragDrop event occurs for the component if the user drops a dragged object over it. | |
OnDragEnter | The OnDragEnter event occurs when a dragged object crosses the borders of this component. | |
OnDragLeave | The OnDragLeave event occurs when a dragged object leaves the borders of this component. | |
OnDragOver | The OnDragOver event occurs for the component when the user drags an object over it. | |
OnEnter | The OnEnter event occurs when the component receives focus. | |
OnExit | The OnExit event occurs when the component loses focus. | |
OnHScroll | The OnHScroll event occurs when horizontal scrollbar slider changes its position. | |
OnKeyDown | The OnKeyDown event occurs if the component is focused and a keyboard key is pressed. | |
OnKeyPress | The OnKeyPress event occurs if the component is focused when the user presses a character key. | |
OnKeyPreview | The OnKeyPreview event occurs prior to each event related to key pressing. | |
OnKeyUp | The OnKeyUp event occurs if the component is focused and the user releases any button previously pressed. | |
OnMouseDown | The OnMouseDown event occurs if the pointer is in component's area and a mouse key is pressed. | |
OnMouseEnter | The OnMouseEnter event occurs when mouse cursor enters the component area. | |
OnMouseHover | The OnMouseHover event occurs when mouse cursor is held in the component area. | |
OnMouseLeave | The OnMouseLeave event occurs when mouse cursor leaves the component area. | |
OnMouseMove | The OnMouseMove event occurs on moving the cursor over component. | |
OnMouseUp | The OnMouseUp event occurs on releasing mouse button when the cursor is in component area. | |
OnMouseWheel | The OnMouseWheel event occurs if the component is focused when the mouse wheel is rotated. | |
OnVScroll | The OnVScroll event occurs when vertical scrollbar slider changes its position. |
See also: