![]() On text editors and word processors of modern design on bitmapped displays, the vertical bar is typically used instead. In situations where a block was used, the block was usually created by inverting the pixels of the character using the boolean math exclusive or function. In text mode displays, it was not possible to show a vertical bar between characters to show where the new text would be inserted, so an underscore or block cursor was used instead. In most command-line interfaces or text editors, the text cursor, also known as a caret, is an underscore, a solid rectangle, or a vertical line, which may be flashing or steady, indicating where text will be placed when entered (the insertion point). POINTER CURSORS WINDOWSThe cursor for the Windows Command Prompt (appearing as an underscore at the end of the line) He wrote that the "bug" would be "easier" and "more natural" to use, and unlike a stylus, it would stay still when let go, which meant it would be "much better for coordination with the keyboard." Īccording to Roger Bates, a young hardware designer at ARC under Bill English, the cursor on the screen was for some unknown reason also referred to as "CAT" at the time, which led to calling the new pointing device a "mouse" as well. POINTER CURSORS HOW TOOn 14 November 1963, while attending a conference on computer graphics in Reno, Nevada, Douglas Engelbart of Augmentation Research Center (ARC) first expressed his thoughts to pursue his objective of developing both hardware and software computer technology to "augment" human intelligence by pondering how to adapt the underlying principles of the planimeter to inputting X- and Y-coordinate data, and envisioned something like the cursor of a mouse he initially called a "bug", which, in a "3-point" form, could have a "drop point and 2 orthogonal wheels". The term was then transferred to computers through analogy. A cursor is a name given to the transparent slide engraved with a hairline used to mark a point on a slide rule. How to simulate mouse events (Windows Forms.How to distinguish between clicks and double-clicks (Windows Forms.Overview of using the mouse (Windows Forms.To display the wait pointer, which resembles an hourglass, whenever the mouse pointer is on the control, use the UseWaitCursor property of the Control class. ![]() The following example changes the cursor of the mouse pointer for a button to a hand: button2.Cursor = .Hand īutton2.Cursor = .Hand In addition, the Cursors class exposes a set of Cursor objects for many different types of pointers, such as a pointer that resembles a hand. POINTER CURSORS CODEFor examples of changing the mouse pointer, see the code example in the Cursor class. The primary way to change the mouse pointer is by setting the Control.Cursor or DefaultCursor property of a control to a new Cursor. Sometimes, the mouse pointer will change because of system events, such as when your application is involved in a drag-and-drop operation. For example, the mouse pointer can be modified in the handlers of the MouseEnter and MouseLeave events to tell the user that computations are occurring and to limit user interaction in the control. Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.ClickĬhanging the mouse pointer is an important way of providing feedback to the user. Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Private void button2_Click(object sender, EventArgs e) =>Ĭursor.Position = PointToScreen(button1.Location) The following example positions the mouse pointer between two buttons when they are clicked: private void button1_Click(object sender, EventArgs e) =>Ĭursor.Position = PointToScreen(button2.Location) ![]() The clip area, by default, is the entire screen. ![]() In addition, you can limit the area the mouse pointer can be used be setting the Clip property. You can get or set the current location of the mouse using the Position property of the Cursor. Sometimes you may want to limit the area in which the mouse pointer can be used or change the position the mouse. Private Sub Button1_MouseLeave(sender As Object, e As EventArgs) Handles Button1.MouseLeave Private Sub Button1_MouseEnter(sender As Object, e As EventArgs) Handles Button1.MouseEnter Private void button1_MouseLeave(object sender, EventArgs e) => The following example hides the cursor when the cursor is over a button: private void button1_MouseEnter(object sender, EventArgs e) => The Cursor class contains properties that describe the pointer, such as the Position and HotSpot properties, and methods that can modify the appearance of the pointer, such as the Show, Hide, and DrawStretched methods. The mouse pointer is represented by the Cursor class, and each Control has a Control.Cursor property that specifies the pointer for that control. ![]()
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