50 lines
2.1 KiB
Rust
50 lines
2.1 KiB
Rust
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// TODO(4bb4) Do this properly.
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// I already added a simple Context struct that can be created once and used as long as it is not
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// dropped here for initial tests - this is of course neither threadsafe nor otherwise safe to use
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// unless one "does it right", so it's not a real solution.
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//
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// The context should have to be created, and ideally it should be difficult to impossible
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// to do things without having a context. implot-rs makes it so that there is a context and
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// that context has a "frame()" function that returns a Ui, and that Ui is then used to create
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// widgets. Windows are built with a build() function that takes a reference to that Ui as an
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// argument, but also have a begin() function that take a context and put it in their token.
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//
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// I think I'll mirror that here, except that we don't need a frame() function, it's enough
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// to create a context once and then keep passing it around. I'll hence need a mutex and
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// a mechansim similar (or equal) to what imgui-rs does for making sure there can only be
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// a single context. Implementation could go roughly like this:
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//
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// - Add a mutex for modifying context things
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// - Make creation and drop functions use that mutex
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// - Change Plot, PlotLine, PlotScatter, PlotBars, PlotText to all require a context.
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// I think I'll call this PlotUi to mimmick imgui-rs' Ui.
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// - Think about what this means in terms of the stacks and things like is_plot_hovered() -
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// they should also only work when there is a context available.
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//
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/// An implot context.
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///
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/// A context is required to do most of the things this library provides. While this was created
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/// implicitly in earlier versions of the library, it is now created explicitly.
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pub struct Context {
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raw: *mut sys::ImPlotContext,
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}
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impl Context {
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/// Create a context.
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pub fn create() -> Self {
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let ctx = unsafe { sys::ImPlot_CreateContext() };
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unsafe {
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sys::ImPlot_SetCurrentContext(ctx);
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}
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Self { raw: ctx }
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}
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}
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impl Drop for Context {
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fn drop(&mut self) {
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unsafe {
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sys::ImPlot_DestroyContext(self.raw);
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}
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}
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}
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