BUTTON
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BUTTON widgets are commonly used as the primary user interface element for touchscreens. Buttons may be displayed with text or with a bitmap.
| BUTTON | |
|---|---|
 | |
| Receives focus | Yes |
| Skinnable | Yes |
| OwnerDraw | No |
| Uses Memory Devices | No |
| Attached widgets | None |
Notification codes
The following events are sent from a BUTTON widget to its parent window as part of a WM_NOTIFY_PARENT message:
| Message | Description |
|---|---|
| WM_NOTIFICATION_CLICKED | BUTTON has been clicked. |
| WM_NOTIFICATION_RELEASED | BUTTON has been released. |
| WM_NOTIFICATION_MOVED_OUT | BUTTON has been clicked and pointer has been moved out of the BUTTON widget without releasing. |
Keyboard reaction
The BUTTON widget reacts to the following keys if it has the input focus:
| Message | Description |
|---|---|
| GUI_KEY_ENTER | If the key is pressed, the BUTTON reacts as it has been pressed and immediately released. |
| GUI_KEY_SPACE | If the key is pressed, the BUTTON state changes to pressed. If the keys is released, the BUTTON state changes to unpressed. |
Samples
Below are links to samples that demonstrate how to use BUTTON widgets in emWin.