elias/imgui-rs
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Expose color variable stack to user.

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In order to have colored and wrapped text, I needed to use this
functionality in my game. This PR implements a version similar to
with_style_var().

From my testing it is safe to use a Vec4 for all the variants of the
enumeration, so I didn't bother putting an enumeration in imgui-rs, I
just reused the enumeration defined in imgui-sys directly.

Let me know if you have any feedback on this.
This commit is contained in:
Benjamin Adamson 2017-07-07 21:32:03 -07:00
parent 5b42d5d079
commit f5ed221b4e
1 changed files with 40 additions and 1 deletions
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41
src/lib.rs
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@ -18,7 +18,7 @@ pub use imgui_sys::{ImDrawIdx, ImDrawVert, ImGuiInputTextFlags, ImGuiInputTextFl
ImGuiInputTextFlags_ReadOnly, ImGuiKey, ImGuiSelectableFlags,
ImGuiSelectableFlags_DontClosePopups, ImGuiSelectableFlags_SpanAllColumns,
ImGuiSetCond, ImGuiSetCond_Always, ImGuiSetCond_Appearing,
ImGuiSetCond_FirstUseEver, ImGuiSetCond_Once, ImGuiStyle, ImGuiTreeNodeFlags,
ImGuiSetCond_FirstUseEver, ImGuiSetCond_Once, ImGuiCol, ImGuiStyle, ImGuiTreeNodeFlags,
ImGuiTreeNodeFlags_AllowOverlapMode, ImGuiTreeNodeFlags_Bullet,
ImGuiTreeNodeFlags_CollapsingHeader, ImGuiTreeNodeFlags_DefaultOpen,
ImGuiTreeNodeFlags_Framed, ImGuiTreeNodeFlags_Leaf,
@ -738,3 +738,42 @@ impl<'ui> Ui<'ui> {
/// ```
pub fn progress_bar<'p>(&self, fraction: f32) -> ProgressBar<'p> { ProgressBar::new(fraction) }
}
impl<'ui> Ui<'ui> {
/// Runs a function after temporarily pushing a value to the color stack.
///
/// # Example
/// ```rust,no_run
/// # use imgui::*;
/// # let mut imgui = ImGui::init();
/// # let ui = imgui.frame((0, 0), (0, 0), 0.1);
/// ui.with_color_var(ImGuiCol::Text, ImVec4::from((1.0, 0.0, 0.0, 1.0)), || {
/// ui.text_wrapped(im_str!("AB"));
/// });
/// ```
pub fn with_color_var<F: FnOnce()>(&self, var: ImGuiCol, color: ImVec4, f: F) {
unsafe { imgui_sys::igPushStyleColor(var, color); }
f();
unsafe {imgui_sys::igPopStyleColor(1); }
}
/// Runs a function after temporarily pushing an array of values to the color stack.
///
/// # Example
/// ```rust,no_run
/// # use imgui::*;
/// # let mut imgui = ImGui::init();
/// # let ui = imgui.frame((0, 0), (0, 0), 0.1);
/// # let vars = [ImGuiCol::Text, ImGuiCol::TextDisabled];
/// ui.with_color_vars(&vars, ImVec4::from((1.0, 0.0, 0.0, 1.0)), || {
/// ui.text_wrapped(im_str!("AB"));
/// });
/// ```
pub fn with_color_vars<F: FnOnce()>(&self, color_vars: &[ImGuiCol], color: ImVec4, f: F) {
for &color_var in color_vars {
unsafe { imgui_sys::igPushStyleColor(color_var, color); }
}
f();
unsafe { imgui_sys::igPopStyleColor(color_vars.len() as i32) };
}
}