Ewl_Histogram: A Simple Histogram widget
Detailed Description
- Remarks:
- Inherits from Ewl_Image.
Tutorial
Data Structures | |
| struct | Ewl_Histogram |
| Inherit from the Ewl_Image and extends to create a histogram widget. More... | |
Defines | |
| #define | EWL_HISTOGRAM(histogram) ((Ewl_Histogram *)histogram) |
| #define | EWL_HISTOGRAM_IS(w) (ewl_widget_type_is(EWL_WIDGET(w), EWL_HISTOGRAM_TYPE)) |
| #define | EWL_HISTOGRAM_TYPE "histogram" |
Typedefs | |
| typedef Ewl_Histogram | Ewl_Histogram |
Functions | |
| void | ewl_histogram_cb_configure (Ewl_Widget *w, void *event, void *data) |
| Ewl_Histogram_Channel | ewl_histogram_channel_get (Ewl_Histogram *histogram) |
| Sets the color channel to graph in the histogram. | |
| void | ewl_histogram_channel_set (Ewl_Histogram *histogram, Ewl_Histogram_Channel channel) |
| Sets the color channel to graph in the histogram. | |
| void | ewl_histogram_color_get (Ewl_Histogram *histogram, unsigned int *r, unsigned int *g, unsigned int *b, unsigned int *a) |
| Get the current color values for drawing the histogram. | |
| void | ewl_histogram_color_set (Ewl_Histogram *histogram, unsigned int r, unsigned int g, unsigned int b, unsigned int a) |
| Changes the drawing color of a histogram. | |
| Ewl_Image * | ewl_histogram_image_get (Ewl_Histogram *histogram) |
| Get the source image used to generate the histogram. | |
| void | ewl_histogram_image_set (Ewl_Histogram *histogram, Ewl_Image *image) |
| Change the source image used to generate the histogram. | |
| int | ewl_histogram_init (Ewl_Histogram *histogram) |
| Initialize a histogram widget to starting values. | |
| Ewl_Widget * | ewl_histogram_new (void) |
| Create a new Ewl_Histogram widget. | |
Define Documentation
| #define EWL_HISTOGRAM | ( | histogram | ) | ((Ewl_Histogram *)histogram) |
Typecast a pointer to an Ewl_Histogram pointer.
| #define EWL_HISTOGRAM_IS | ( | w | ) | (ewl_widget_type_is(EWL_WIDGET(w), EWL_HISTOGRAM_TYPE)) |
Returns TRUE if the widget is an Ewl_Histogram, FALSE otherwise
| #define EWL_HISTOGRAM_TYPE "histogram" |
The type name for the Ewl_Histogram widget
Typedef Documentation
| typedef struct Ewl_Histogram Ewl_Histogram |
The Ewl_Histogram
Function Documentation
| void ewl_histogram_cb_configure | ( | Ewl_Widget * | w, | |
| void * | event, | |||
| void * | data | |||
| ) |
| Ewl_Histogram_Channel ewl_histogram_channel_get | ( | Ewl_Histogram * | hist | ) |
Sets the color channel to graph in the histogram.
- Parameters:
-
hist,: the histogram to change the channel drawn
- Returns:
- Returns the currently drawn color channel.
| void ewl_histogram_channel_set | ( | Ewl_Histogram * | hist, | |
| Ewl_Histogram_Channel | channel | |||
| ) |
Sets the color channel to graph in the histogram.
- Parameters:
-
hist,: the histogram to change the channel drawn channel,: the color channel to draw in the histogram
- Returns:
- Returns no value.
| void ewl_histogram_color_get | ( | Ewl_Histogram * | hist, | |
| unsigned int * | r, | |||
| unsigned int * | g, | |||
| unsigned int * | b, | |||
| unsigned int * | a | |||
| ) |
Get the current color values for drawing the histogram.
- Parameters:
-
hist,: the histogram widget to retrieve display color r,: red value for histogram drawing color g,: green value for histogram drawing color b,: blue value for histogram drawing color a,: apha value for histogram drawing color
- Returns:
- Returns no value.
| void ewl_histogram_color_set | ( | Ewl_Histogram * | hist, | |
| unsigned int | r, | |||
| unsigned int | g, | |||
| unsigned int | b, | |||
| unsigned int | a | |||
| ) |
Changes the drawing color of a histogram.
- Parameters:
-
hist,: the histogram widget to change display color r,: red value for histogram drawing color g,: green value for histogram drawing color b,: blue value for histogram drawing color a,: apha value for histogram drawing color
- Returns:
- Returns no value.
| Ewl_Image* ewl_histogram_image_get | ( | Ewl_Histogram * | hist | ) |
Get the source image used to generate the histogram.
- Parameters:
-
hist,: the histogram to get source image
- Returns:
- Returns a pointer to the current source image.
| void ewl_histogram_image_set | ( | Ewl_Histogram * | hist, | |
| Ewl_Image * | image | |||
| ) |
Change the source image used to generate the histogram.
- Parameters:
-
hist,: the histogram to change source image image,: the new source image for the histogram
- Returns:
- Returns no value.
| int ewl_histogram_init | ( | Ewl_Histogram * | hist | ) |
Initialize a histogram widget to starting values.
- Parameters:
-
hist,: the histogram widget to initialize
- Returns:
- Returns TRUE on success, FALSE on failure.
| Ewl_Widget* ewl_histogram_new | ( | void | ) |