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GocStyledItem

GocStyledItem — Styled items

Properties

gboolean scale-line-width Read / Write
GOStyle * style Read / Write

Signals

void style-changed Run Last

Types and Values

Object Hierarchy

    GObject
    ╰── GocItem
        ╰── GocStyledItem
            ├── GocArc
            ├── GocCircle
            ├── GocEllipse
            ├── GocLine
            ├── GocPath
            ├── GocPolygon
            ├── GocPolyline
            ├── GocRectangle
            ╰── GocText

Implemented Interfaces

GocStyledItem implements GOStyledObject.

Description

The virtual base object for canvas items with style.

Functions

goc_styled_item_set_cairo_line ()

gboolean
goc_styled_item_set_cairo_line (GocStyledItem const *gsi,
                                cairo_t *cr);

Prepares the cairo context cr to draw a line according to the item style and canvas scale. The line width is scaled only if the scale-line-width property is set to TRUE. This function calls go_styled_object_set_cairo_line().

If the item drawing used goc_group_cairo_transform(), scale-line-width should be FALSE to avoid scaling twice, or go_styled_object_set_cairo_line() should be called directly instead.

Parameters

gsi

GocStyledItem

 

cr

cairo_t

 

Returns

TRUE if the line is not invisible


goc_styled_item_get_scale_line_width ()

gboolean
goc_styled_item_get_scale_line_width (GocStyledItem const *gsi);

This function returns TRUE if the line width needs to be scaled. It will always return FALSE if the line width is 0.

Parameters

gsi

GocStyledItem

 

Returns

whether the line width needs to be scaled.


goc_styled_item_set_scale_line_width ()

void
goc_styled_item_set_scale_line_width (GocStyledItem *gsi,
                                      gboolean scale_line_width);

Sets whether the line width needs to be scaled according to the current canvas resolution and the item transformation. It will be ignored if the line width is 0. Default value is TRUE.

Parameters

gsi

GocStyledItem

 

scale_line_width

boolean

 

Types and Values

GocStyledItem

typedef struct _GocStyledItem GocStyledItem;


struct GocStyledItemClass

struct GocStyledItemClass {
	/* virtual */
	void	  (*init_style)     	(GocStyledItem *item, GOStyle *style);
	void (*reserved1) (void);
	void (*reserved2) (void);
};

Members

init_style ()

style initialization handler.

 

reserved1 ()

   

reserved2 ()

   

Property Details

The “scale-line-width” property

  “scale-line-width”         gboolean

Whether to scale the line width when zooming.

Flags: Read / Write

Default value: TRUE


The “style” property

  “style”                    GOStyle *

A pointer to the GOStyle object.

Flags: Read / Write

Signal Details

The “style-changed” signal

void
user_function (GocStyledItem *gsi,
               GObject       *style,
               gpointer       user_data)

The ::style-changed signal is emitted when a new style has been set on a styled item.

Parameters

gsi

the object on which the signal is emitted

 

style

the new GOStyle.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last

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