In previous examples, we already use .Items several times (see Getting Started with DelphiVCL III: Overview of Commonly used VCL Components). We use it in ListBox, ComboBox, and RadioGroup. Items contain the strings that appear in the ListBox, ComboBox, and RadioGroup.
Use Items to add, insert, delete and move items. By default, the items in a list box are of type Strings. Use this item type to…
DelphiVCL.Memo is a wrapper for a Windows multiline edit control.
We use Memo to put a standard Windows multiline edit control on a form. Multiline edit boxes allow the user to enter more than one line of text. They are appropriate for representing lengthy…
DelphiVCL.StaticText or TStaticText is a windowed control that displays text on a form.
The DelphiVCL.StaticText or TStaticText component functions like TLabel, except that it descends from TWinControl and therefore has a window handle. Use TStaticText instead of…
DelphiVCL.Splitter or TSplitter divides the client area of a form into resizable panes.
Add a splitter to a form between two aligned controls to allow users to resize the controls at runtime. The splitter sits between a control aligned to one edge of the form and the controls that fill up the rest of the client area. Give the splitter the same alignment as the control that is anchored to…
DelphiVCL.SpinEdit or TSpinEdit combines a TEdit box with a TSpinButton.
DelphiVCL.SpinEdit component is a TEdit with a TSpinButton attached. The Value of the edit box is numerical. By pressing the up and down buttons of TSpinButton, the Value is increased or…
DelphiVCL.SpinButton or TSpinButton allows the user to navigate through a range of values using the arrow buttons.
DelphiVCL.SpinButton is a control with two TTimerSpeedButtons, each button displaying an arrow. TSpinButton allows the navigation through a range of…
TGridDrawState represents information useful when rendering the cell of a grid.
TGridDrawState represents state information about the cell of a grid that is being rendered. It is a set that includes one or more of the states listed in the following table:
Value
Meaning
gdSelected
The cell is currently selected.
gdFocused
The cell has input…
DelphiVCL.Button is a push-button control.
Use Button to put a standard push button on a form. Button introduces several properties to control its behavior in a dialog-box setting. To initiate actions, users choose button controls
To use a button that displays a…
DelphiVCL.SpeedButton or TSpeedButton is a button that is used to execute commands or set modes.
Use DelphiVCL.SpeedButton to add a button to a group of buttons in a form. TSpeedButton introduces properties that can be used to set graphical images that represent the…
DelphiVCL.Rect or TRect defines a rectangle.
TRect represents the dimensions of a rectangle. The coordinates are specified as either four separate integers representing the left, top, right, and bottom sides, or as two points representing the locations of the upper-left and lower-right corners.
Typically, DelphiVCL.Rect values represent pixel locations, where the origin of the pixel…
