Golang C.gdouble函数代码示例

// LevelBarNewForInterval() is a wrapper around gtk_level_bar_new_for_interval().
func LevelBarNewForInterval(min_value, max_value float64) (*LevelBar, error) {
	c := C.gtk_level_bar_new_for_interval(C.gdouble(min_value), C.gdouble(max_value))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapLevelBar(wrapObject(unsafe.Pointer(c))), nil
}

func (self RGBA) ToNative() unsafe.Pointer {
	crgba := C._new_rgba()

	crgba.red = C.gdouble(self.Red)
	crgba.green = C.gdouble(self.Green)
	crgba.blue = C.gdouble(self.Blue)
	crgba.alpha = C.gdouble(self.Alpha)

	return unsafe.Pointer(crgba)
}

//-----------------------------------------------------------------------
// GValue
//-----------------------------------------------------------------------
func GValueFromNative(value interface{}) *C.GValue {
	var gv *C.GValue

	if _, ok := value.(WrappedObject); ok {
		value = value.(WrappedObject).GetInternalValue()
	}
	if _, ok := value.(GObject); ok {
		value = value.(GObject).Object
	}
	if _, ok := value.(GValue); ok {
		value = value.(GValue).Value
	}

	switch value.(type) {
	case bool:
		gv = C.init_gvalue_bool(gbool(value.(bool)))
		break
	case byte:
		gv = C.init_gvalue_byte(C.guchar(value.(byte)))
		break
	case int:
		gv = C.init_gvalue_int(C.gint(value.(int)))
		break
	case uint:
		gv = C.init_gvalue_uint(C.guint(value.(uint)))
		break
	case int64:
		gv = C.init_gvalue_int64(C.gint64(value.(int64)))
		break
	case float32:
		gv = C.init_gvalue_double(C.gdouble(value.(float32)))
		break
	case float64:
		gv = C.init_gvalue_double(C.gdouble(value.(float64)))
		break
	case string:
		{
			pval := C.CString(value.(string))
			defer C.free_string(pval)
			gv = C.init_gvalue_string(C.to_gcharptr(pval))
		}
		break
	default:
		//gv = C.init_gvalue_pointer(C.gpointer(unsafe.Pointer(&value)));
		break
	}
	return gv
}

func NewRGBA(values ...float64) *RGBA {
	c := &RGBA{}
	if len(values) > 0 {
		c.RGBA.red = C.gdouble(values[0])
	}
	if len(values) > 1 {
		c.RGBA.green = C.gdouble(values[1])
	}
	if len(values) > 2 {
		c.RGBA.blue = C.gdouble(values[2])
	}
	if len(values) > 3 {
		c.RGBA.alpha = C.gdouble(values[3])
	}
	return c
}

func NewRGBA(values ...float64) *RGBA {
	cval := C.GdkRGBA{}
	c := &RGBA{&cval}
	if len(values) > 0 {
		c.rgba.red = C.gdouble(values[0])
	}
	if len(values) > 1 {
		c.rgba.green = C.gdouble(values[1])
	}
	if len(values) > 2 {
		c.rgba.blue = C.gdouble(values[2])
	}
	if len(values) > 3 {
		c.rgba.alpha = C.gdouble(values[3])
	}
	return c
}

func cListDouble(value []float64) *C.gdouble {
	var clist *C.gdouble
	clist = (*C.gdouble)(C.malloc(C.size_t(int(unsafe.Sizeof(*clist)) * len(value))))
	for i, e := range value {
		(*(*[999999]C.gdouble)(unsafe.Pointer(clist)))[i] = C.gdouble(e)
	}
	return clist
}

func newSpinbox(min int, max int) Spinbox {
	// gtk_spin_button_new_with_range() initially sets its value to the minimum value
	widget := C.gtk_spin_button_new_with_range(C.gdouble(min), C.gdouble(max), 1)
	s := &spinbox{
		controlSingleWidget: newControlSingleWidget(widget),
		spinbutton:          (*C.GtkSpinButton)(unsafe.Pointer(widget)),
		changed:             newEvent(),
	}
	C.gtk_spin_button_set_digits(s.spinbutton, 0)       // integers
	C.gtk_spin_button_set_numeric(s.spinbutton, C.TRUE) // digits only
	// this isn't specifically documented as the signal to connect to until 3.14
	// it has existed as far back as 3.4, though, if not earlier
	// there's also ::change-value which is for keyboard changing
	g_signal_connect(
		C.gpointer(unsafe.Pointer(s.spinbutton)),
		"value-changed",
		C.GCallback(C.spinboxChanged),
		C.gpointer(unsafe.Pointer(s)))
	return s
}

// Seek() is a wrapper around gst_element_seek().
func (v *Element) Seek(rate float64, format Format, flags SeekFlags, startType SeekType, start int64, stopType SeekType, stop int64) bool {
	c := C.gst_element_seek(v.native(),
		C.gdouble(rate),
		C.GstFormat(format),
		C.GstSeekFlags(flags),
		C.GstSeekType(startType),
		C.gint64(start),
		C.GstSeekType(stopType),
		C.gint64(stop))
	return gobool(c)
}

// Set value to i
func (v *Value) Set(i interface{}) {
	if vg, ok := i.(ValueGetter); ok {
		vg.Value().Copy(v)
		return
	}
	// Other types
	r := reflect.ValueOf(i)
	switch r.Kind() {
	case reflect.Invalid:
		C.g_value_reset(v.g())

	case reflect.Bool:
		C.g_value_set_boolean(v.g(), gBoolean(r.Bool()))

	case reflect.Int:
		C.g_value_set_long(v.g(), C.glong(i.(int)))

	case reflect.Int8:
		C.g_value_set_schar(v.g(), C.gint8(i.(int8)))

	case reflect.Int32:
		C.g_value_set_int(v.g(), C.gint(i.(int32)))

	case reflect.Int64:
		C.g_value_set_int64(v.g(), C.gint64(i.(int64)))

	case reflect.Uint:
		C.g_value_set_ulong(v.g(), C.gulong(i.(uint)))

	case reflect.Uint8:
		C.g_value_set_uchar(v.g(), C.guchar(i.(uint8)))

	case reflect.Uint32:
		C.g_value_set_uint(v.g(), C.guint(i.(uint32)))

	case reflect.Uint64:
		C.g_value_set_uint64(v.g(), C.guint64(i.(uint64)))

	case reflect.Float32:
		C.g_value_set_float(v.g(), C.gfloat(i.(float32)))

	case reflect.Float64:
		C.g_value_set_double(v.g(), C.gdouble(i.(float64)))

	case reflect.Ptr:
		C.g_value_set_pointer(v.g(), C.gpointer(r.Pointer()))

	case reflect.String:
		C.g_value_set_static_string(v.g(), (*C.gchar)(C.CString(r.String())))

	default:
		panic("Can't represent Go value in Glib type system.")
	}
}

func (s *spinbox) SetValue(value int) {
	var min, max C.gdouble

	C.gtk_spin_button_get_range(s.spinbutton, &min, &max)
	if value < int(min) {
		value = int(min)
	}
	if value > int(max) {
		value = int(max)
	}
	C.gtk_spin_button_set_value(s.spinbutton, C.gdouble(value))
}

// Set is a generic wrapper around g_key_file_set_xxx() with type assertion.
func (kf *KeyFile) Set(group string, key string, uncasted interface{}) error {
	cGroup := (*C.gchar)(C.CString(group))
	defer C.g_free(C.gpointer(cGroup))
	cKey := (*C.gchar)(C.CString(key))
	defer C.g_free(C.gpointer(cKey))

	switch value := uncasted.(type) {
	case bool:
		C.g_key_file_set_boolean(kf.cKey, cGroup, cKey, cBool(value))

	case int:
		C.g_key_file_set_integer(kf.cKey, cGroup, cKey, C.gint(value))

	case float64:
		C.g_key_file_set_double(kf.cKey, cGroup, cKey, C.gdouble(value))

	case string:
		cstr := (*C.gchar)(C.CString(value))
		defer C.g_free(C.gpointer(cstr))
		C.g_key_file_set_string(kf.cKey, cGroup, cKey, cstr)

	case []bool:
		clist := cListBool(value)
		defer C.g_free(C.gpointer(clist))
		C.g_key_file_set_boolean_list(kf.cKey, cGroup, cKey, clist, C.gsize(len(value)))

	case []int:
		clist := cListInt(value)
		defer C.g_free(C.gpointer(clist))
		C.g_key_file_set_integer_list(kf.cKey, cGroup, cKey, clist, C.gsize(len(value)))

	case []float64:
		clist := cListDouble(value)
		defer C.g_free(C.gpointer(clist))
		C.g_key_file_set_double_list(kf.cKey, cGroup, cKey, clist, C.gsize(len(value)))

	case []string:
		clist := cListString(value)
		C.g_key_file_set_string_list(kf.cKey, cGroup, cKey, clist, C.gsize(len(value)))
		for i := range value {
			C.g_free(C.gpointer((*(*[999999]*C.gchar)(unsafe.Pointer(clist)))[i]))
		}
		C.g_free(C.gpointer(clist))

	default:
		return errors.New("type unknown")
	}
	return nil
}

func (self *Label) SetAngle(angle float64) {
	C.gtk_label_set_angle(self.object, C.gdouble(angle))
}

func (o *dockIcon) SetY(f float64)                { o.Ptr.fY = C.gdouble(f) }

// SetDouble is a wrapper around g_settings_set_double().
func (v *Settings) SetDouble(name string, value float64) bool {
	cstr1 := (*C.gchar)(C.CString(name))
	defer C.free(unsafe.Pointer(cstr1))

	return gobool(C.g_settings_set_double(v.native(), cstr1, C.gdouble(value)))
}

func (p *progressbar) SetPercent(percent int) {
	if percent < 0 || percent > 100 {
		panic(fmt.Errorf("given ProgressBar percentage %d out of range", percent))
	}
	C.gtk_progress_bar_set_fraction(p.pbar, C.gdouble(percent)/100)
}