1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

use std::ptr;
use std::thread;

use crate::context::Context;
use crate::sys;
use crate::Ui;

/// Tracks a layout group that must be ended by calling `.end()`
#[must_use]
pub struct GroupToken {
    ctx: *const Context,
}

impl GroupToken {
    /// Ends a layout group
    pub fn end(mut self, _: &Ui) {
        self.ctx = ptr::null();
        unsafe { sys::igEndGroup() };
    }
}

impl Drop for GroupToken {
    fn drop(&mut self) {
        if !self.ctx.is_null() && !thread::panicking() {
            panic!("A GroupToken was leaked. Did you call .end()?");
        }
    }
}

/// # Cursor / Layout
impl<'ui> Ui<'ui> {
    /// Renders a separator (generally horizontal).
    ///
    /// This becomes a vertical separator inside a menu bar or in horizontal layout mode.
    pub fn separator(&self) {
        unsafe { sys::igSeparator() }
    }
    /// Call between widgets or groups to layout them horizontally.
    ///
    /// X position is given in window coordinates.
    pub fn same_line(&self, pos_x: f32) {
        unsafe { sys::igSameLine(pos_x, -1.0f32) }
    }
    /// Call between widgets or groups to layout them horizontally.
    ///
    /// X position is given in window coordinates.
    pub fn same_line_with_spacing(&self, pos_x: f32, spacing_w: f32) {
        unsafe { sys::igSameLine(pos_x, spacing_w) }
    }
    /// Undo a `same_line` call or force a new line when in horizontal layout mode
    pub fn new_line(&self) {
        unsafe { sys::igNewLine() }
    }
    /// Adds vertical spacing
    pub fn spacing(&self) {
        unsafe { sys::igSpacing() }
    }
    /// Fills a space of `size` in pixels with nothing on the current window.
    ///
    /// Can be used to move the cursor on the window.
    pub fn dummy(&self, size: [f32; 2]) {
        unsafe { sys::igDummy(size.into()) }
    }
    /// Moves content position to the right by `Style::indent_spacing`
    pub fn indent(&self) {
        unsafe { sys::igIndent(0.0) };
    }
    /// Moves content position to the right by `width`
    pub fn indent_by(&self, width: f32) {
        unsafe { sys::igIndent(width) };
    }
    /// Moves content position to the left by `Style::indent_spacing`
    pub fn unindent(&self) {
        unsafe { sys::igUnindent(0.0) };
    }
    /// Moves content position to the left by `width`
    pub fn unindent_by(&self, width: f32) {
        unsafe { sys::igUnindent(width) };
    }
    /// Groups items together as a single item.
    ///
    /// May be useful to handle the same mouse event on a group of items, for example.
    ///
    /// Returns a `GroupToken` that must be ended by calling `.end()`
    #[must_use]
    pub fn begin_group(&self) -> GroupToken {
        unsafe { sys::igBeginGroup() };
        GroupToken { ctx: self.ctx }
    }
    /// Creates a layout group and runs a closure to construct the contents.
    ///
    /// May be useful to handle the same mouse event on a group of items, for example.
    pub fn group<R, F: FnOnce() -> R>(&self, f: F) -> R {
        let group = self.begin_group();
        let result = f();
        group.end(self);
        result
    }
    /// Returns the cursor position (in window coordinates)
    pub fn cursor_pos(&self) -> [f32; 2] {
        unsafe { sys::igGetCursorPos_nonUDT2().into() }
    }
    /// Sets the cursor position (in window coordinates).
    ///
    /// This sets the point on which the next widget will be drawn.
    pub fn set_cursor_pos(&self, pos: [f32; 2]) {
        unsafe { sys::igSetCursorPos(pos.into()) };
    }
    /// Returns the initial cursor position (in window coordinates)
    pub fn cursor_start_pos(&self) -> [f32; 2] {
        unsafe { sys::igGetCursorStartPos_nonUDT2().into() }
    }
    /// Returns the cursor position (in absolute screen coordinates).
    ///
    /// This is especially useful for drawing, as the drawing API uses screen coordinates.
    pub fn cursor_screen_pos(&self) -> [f32; 2] {
        unsafe { sys::igGetCursorScreenPos_nonUDT2().into() }
    }
    /// Sets the cursor position (in absolute screen coordinates)
    pub fn set_cursor_screen_pos(&self, pos: [f32; 2]) {
        unsafe { sys::igSetCursorScreenPos(pos.into()) }
    }
    /// Vertically aligns text baseline so that it will align properly to regularly frame items.
    ///
    /// Call this if you have text on a line before a framed item.
    pub fn align_text_to_frame_padding(&self) {
        unsafe { sys::igAlignTextToFramePadding() };
    }
    pub fn text_line_height(&self) -> f32 {
        unsafe { sys::igGetTextLineHeight() }
    }
    pub fn text_line_height_with_spacing(&self) -> f32 {
        unsafe { sys::igGetTextLineHeightWithSpacing() }
    }
    pub fn frame_height(&self) -> f32 {
        unsafe { sys::igGetFrameHeight() }
    }
    pub fn frame_height_with_spacing(&self) -> f32 {
        unsafe { sys::igGetFrameHeightWithSpacing() }
    }
}