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use std::os::raw::c_void;
use std::ptr;
use crate::internal::{DataTypeKind, InclusiveRangeBounds};
use crate::string::ImStr;
use crate::sys;
use crate::widget::slider::SliderFlags;
use crate::Ui;
/// Builder for a drag slider widget.
#[derive(Copy, Clone, Debug)]
#[must_use]
pub struct Drag<'a, T: DataTypeKind> {
label: &'a ImStr,
speed: f32,
min: Option<T>,
max: Option<T>,
display_format: Option<&'a ImStr>,
flags: SliderFlags,
}
impl<'a, T: DataTypeKind> Drag<'a, T> {
/// Constructs a new drag slider builder.
pub fn new(label: &ImStr) -> Drag<T> {
Drag {
label,
speed: 1.0,
min: None,
max: None,
display_format: None,
flags: SliderFlags::empty(),
}
}
/// Sets the range (inclusive)
#[inline]
pub fn range<R: InclusiveRangeBounds<T>>(mut self, range: R) -> Self {
self.min = range.start_bound().copied();
self.max = range.end_bound().copied();
self
}
/// Sets the value increment for a movement of one pixel.
///
/// Example: speed=0.2 means mouse needs to move 5 pixels to increase the slider value by 1
#[inline]
pub fn speed(mut self, speed: f32) -> Self {
self.speed = speed;
self
}
/// Sets the display format using *a C-style printf string*
#[inline]
pub fn display_format(mut self, display_format: &'a ImStr) -> Self {
self.display_format = Some(display_format);
self
}
/// Replaces all current settings with the given flags
#[inline]
pub fn flags(mut self, flags: SliderFlags) -> Self {
self.flags = flags;
self
}
/// Builds a drag slider that is bound to the given value.
///
/// Returns true if the slider value was changed.
pub fn build(self, _: &Ui, value: &mut T) -> bool {
unsafe {
sys::igDragScalar(
self.label.as_ptr(),
T::KIND as i32,
value as *mut T as *mut c_void,
self.speed,
self.min
.as_ref()
.map(|min| min as *const T)
.unwrap_or(ptr::null()) as *const c_void,
self.max
.as_ref()
.map(|max| max as *const T)
.unwrap_or(ptr::null()) as *const c_void,
self.display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.flags.bits() as i32,
)
}
}
/// Builds a horizontal array of multiple drag sliders attached to the given slice.
///
/// Returns true if any slider value was changed.
pub fn build_array(self, _: &Ui, values: &mut [T]) -> bool {
unsafe {
sys::igDragScalarN(
self.label.as_ptr(),
T::KIND as i32,
values.as_mut_ptr() as *mut c_void,
values.len() as i32,
self.speed,
self.min
.as_ref()
.map(|min| min as *const T)
.unwrap_or(ptr::null()) as *const c_void,
self.max
.as_ref()
.map(|max| max as *const T)
.unwrap_or(ptr::null()) as *const c_void,
self.display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.flags.bits() as i32,
)
}
}
}
/// Builder for a drag slider widget.
#[derive(Copy, Clone, Debug)]
#[must_use]
pub struct DragRange<'a, T: DataTypeKind> {
label: &'a ImStr,
speed: f32,
min: Option<T>,
max: Option<T>,
display_format: Option<&'a ImStr>,
max_display_format: Option<&'a ImStr>,
flags: SliderFlags,
}
impl<'a, T: DataTypeKind> DragRange<'a, T> {
/// Constructs a new drag slider builder.
pub fn new(label: &ImStr) -> DragRange<T> {
DragRange {
label,
speed: 1.0,
min: None,
max: None,
display_format: None,
max_display_format: None,
flags: SliderFlags::empty(),
}
}
#[inline]
pub fn range<R: InclusiveRangeBounds<T>>(mut self, range: R) -> Self {
self.min = range.start_bound().copied();
self.max = range.end_bound().copied();
self
}
/// Sets the value increment for a movement of one pixel.
///
/// Example: speed=0.2 means mouse needs to move 5 pixels to increase the slider value by 1
#[inline]
pub fn speed(mut self, speed: f32) -> Self {
self.speed = speed;
self
}
/// Sets the display format using *a C-style printf string*
#[inline]
pub fn display_format(mut self, display_format: &'a ImStr) -> Self {
self.display_format = Some(display_format);
self
}
/// Sets the display format for the max value using *a C-style printf string*
#[inline]
pub fn max_display_format(mut self, max_display_format: &'a ImStr) -> Self {
self.max_display_format = Some(max_display_format);
self
}
/// Replaces all current settings with the given flags
#[inline]
pub fn flags(mut self, flags: SliderFlags) -> Self {
self.flags = flags;
self
}
}
impl<'a> DragRange<'a, f32> {
/// Builds a drag range slider that is bound to the given min/max values.
///
/// Returns true if the slider value was changed.
pub fn build(self, _: &Ui, min: &mut f32, max: &mut f32) -> bool {
unsafe {
sys::igDragFloatRange2(
self.label.as_ptr(),
min as *mut f32,
max as *mut f32,
self.speed,
self.min.unwrap_or(0.0),
self.max.unwrap_or(0.0),
self.display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.max_display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.flags.bits() as i32,
)
}
}
}
impl<'a> DragRange<'a, i32> {
/// Builds a drag range slider that is bound to the given min/max values.
///
/// Returns true if the slider value was changed.
pub fn build(self, _: &Ui, min: &mut i32, max: &mut i32) -> bool {
unsafe {
sys::igDragIntRange2(
self.label.as_ptr(),
min as *mut i32,
max as *mut i32,
self.speed,
self.min.unwrap_or(0),
self.max.unwrap_or(0),
self.display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.max_display_format
.map(ImStr::as_ptr)
.unwrap_or(ptr::null()),
self.flags.bits() as i32,
)
}
}
}