Synopsis
GocStyledItem; struct GocStyledItemClass; gboolean goc_styled_item_set_cairo_line (GocStyledItem const *gsi
,cairo_t *cr
); gboolean goc_styled_item_get_scale_line_width (GocStyledItem const *gsi
); void goc_styled_item_set_scale_line_width (GocStyledItem *gsi
,gboolean scale_line_width
);
Object Hierarchy
GObject +----GocItem +----GocStyledItem +----GocArc +----GocCircle +----GocEllipse +----GocLine +----GocPath +----GocPolygon +----GocPolyline +----GocRectangle +----GocText
Details
struct GocStyledItemClass
struct GocStyledItemClass { /* virtual */ void (*init_style) (GocStyledItem *item, GOStyle *style); void (*reserved1) (void); void (*reserved2) (void); };
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.
|
GocStyledItem |
|
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.
|
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
.
|
GocStyledItem |
|
boolean |
Property Details
The "scale-line-width"
property
"scale-line-width" gboolean : Read / Write
Whether to scale the line width when zooming.
Default value: TRUE
Signal Details
The "style-changed"
signal
void user_function (GocStyledItem *gsi,
GObject *style,
gpointer user_data) : Run Last
The ::style-changed signal is emitted when a new style has been set on a styled item.
|
the object on which the signal is emitted |
|
the new GOStyle. |
|
user data set when the signal handler was connected. |