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

use crate::co;
use crate::decl::*;
use crate::gui::{*, privs::*};
use crate::msg::*;
use crate::prelude::*;

/// A single column of a [`ListView`](crate::gui::ListView) control.
///
/// **Note:** Each object keeps the zero-based index of a column. If new columns
/// are added/removed from the list view control, the object may then point to a
/// different item.
///
/// You cannot directly instantiate this object, it is created internally by the
/// control.
#[derive(Clone, Copy)]
pub struct ListViewColumn<'a, T: 'static = ()> {
	owner: &'a ListView<T>,
	index: u32,
}

impl<'a, T> ListViewColumn<'a, T> {
	#[must_use]
	pub(in crate::gui) const fn new(owner: &'a ListView<T>, index: u32) -> Self {
		Self { owner, index }
	}

	/// Sets the title of the column by sending an
	/// [`lvm::SetColumn`](crate::msg::lvm::SetColumn) message.
	pub fn set_title(&self, text: &str) {
		let mut lvc = LVCOLUMN::default();
		lvc.iSubItem = self.index as _;
		lvc.mask = co::LVCF::TEXT;

		let mut buf = WString::from_str(text);
		lvc.set_pszText(Some(&mut buf));

		unsafe {
			self.owner.hwnd()
				.SendMessage(lvm::SetColumn {
					index: self.index,
					lvcolumn: &mut lvc,
				})
		}.unwrap();
	}

	/// Sets the width of the column by sending an
	/// [`lvm::SetColumnWidth`](crate::msg::lvm::SetColumnWidth) message.
	///
	/// Width will be adjusted to match current system DPI.
	pub fn set_width(&self, width: u32) {
		let mut col_cx = SIZE::new(width as _, 0);
		multiply_dpi(None, Some(&mut col_cx)).unwrap();

		unsafe {
			self.owner.hwnd()
				.SendMessage(lvm::SetColumnWidth {
					index: self.index,
					width: col_cx.cx as _,
				})
		}.unwrap();
	}

	/// Sets the width of the column by sending an
	/// [`lvm::SetColumnWidth`](crate::msg::lvm::SetColumnWidth) message. The
	/// width will be calculated to fill the remaining space.
	pub fn set_width_to_fill(&self) {
		let num_cols = self.owner.columns().count();
		if num_cols > 0 {
			let mut cx_used = 0;

			for i in 0..num_cols {
				if i != self.index {
					cx_used += self.owner.columns().get(i).width(); // retrieve cx of each column, but us
				}
			}

			let rc = self.owner.hwnd().GetClientRect().unwrap(); // list view client area

			unsafe {
				self.owner.hwnd()
					.SendMessage(lvm::SetColumnWidth {
						index: self.index,
						width: rc.right as u32 - cx_used,
					})
			}.unwrap();
		}
	}

	/// Retrieves the title of the column by sending an
	/// [`lvm::GetColumn`](crate::msg::lvm::GetColumn) message.
	#[must_use]
	pub fn title(&self) -> String {
		let mut lvc = LVCOLUMN::default();
		lvc.iSubItem = self.index as _;
		lvc.mask = co::LVCF::TEXT;

		let mut buf = WString::new_alloc_buf(128); // arbitrary
		lvc.set_pszText(Some(&mut buf));

		unsafe {
			self.owner.hwnd()
				.SendMessage(lvm::GetColumn {
					index: self.index,
					lvcolumn: &mut lvc,
				})
		}.unwrap();

		buf.to_string()
	}

	/// Retrieves the width of the column by sending an
	/// [`lvm::GetColumnWidth`](crate::msg::lvm::GetColumnWidth) message.
	#[must_use]
	pub fn width(&self) -> u32 {
		unsafe {
			self.owner.hwnd()
				.SendMessage(lvm::GetColumnWidth { index: self.index })
		}.unwrap()
	}
}