CanvasDrawRoundedRect
int CanvasDrawRoundedRect (int panelHandle, int controlID, Rect rectangle, int ovalHeight, int ovalWidth, int drawMode);
Purpose
Draws a rounded rectangle on the canvas control at the position and with the dimensions specified by the rect parameter. Each corner of the rectangle is drawn as a quadrant of an oval.
CanvasDrawRoundedRect draws the frame of the rectangle using the current value of the following attributes:
ATTR_PEN_COLOR
ATTR_PEN_MODE
ATTR_PEN_WIDTH
ATTR_PEN_STYLE (ignored when pen width is greater than one)
CanvasDrawRoundedRect draws the interior of the rectangle using the current value of the following attributes:
ATTR_PEN_FILL_COLOR
ATTR_PEN_MODE
ATTR_PEN_PATTERN
Supported Controls
You can use CanvasDrawRoundedRect with canvas controls.
Parameters
| Input | ||
| Name | Type | Description |
| panelHandle | int | Specifier for a particular panel that is currently in memory. You can obtain this handle from functions such as LoadPanel and NewPanel. |
| controlID | int | The defined constant, located in the .uir header file, that you assigned to the control in the User Interface Editor, or the ID returned by functions such as NewCtrl and DuplicateCtrl. |
| rectangle | Rect | Rect structure specifying the location and size of the rectangle to be drawn. The Rect structure is defined as follows: typedef struct { int top; int left; int height; int width; } Rect; You can create a Rect without having to declare a variable by using the following function: Rect MakeRect (int top, int left, int height, int width); ExampleCanvasDrawRoundedRect (panelHandle, controlID, MakeRect(20,30,150,200), 5, 5, VAL_DRAW_FRAME); |
| ovalHeight | int | Vertical diameter of the oval whose quadrants are drawn at the corners of the rounded rectangle. |
| ovalWidth | int | Horizontal diameter of the oval whose quadrants are drawn at the corners of the rounded rectangle. |
| drawMode | int | Specifies whether to draw the rectangle frame, or interior, or both. The following lists the valid
values: VAL_DRAW_FRAME VAL_DRAW_INTERIOR VAL_DRAW_FRAME_AND_INTERIOR |
Return Value
| Name | Type | Description |
| status | int | Return value indicating whether the function was successful. A negative number indicates that an error occurred. |
Additional Information
Library: User Interface Library
Include file: userint.h
LabWindows/CVI compatibility: LabWindows/CVI 4.0 and later