mirror of
https://github.com/eliasstepanik/imgui-rs.git
synced 2026-01-10 04:58:34 +00:00
Elias Stepanik
57ae256f37
Identified and implemented workaround for viewport callbacks not being triggered when windows are dragged outside the main window. Root cause: ConfigFlags::VIEWPORTS_ENABLE is reset after first render() call due to an issue in the imgui-rs bindings or Dear ImGui itself. Workaround: Re-apply the viewport flag before each new_frame() call using viewport_issue_fix::apply_viewport_fix(). Added: - viewport_issue_fix module with apply_viewport_fix() function - Debug and solution examples demonstrating the issue and fix - Integration tests for the workaround - Comprehensive documentation of findings in VIEWPORT_FIX_SUMMARY.md This is a temporary workaround until the root cause is fixed in imgui-rs or the Dear ImGui library. Co-Authored-By: Elias Stepanik <eliasstepanik@proton.me>
65 lines
2.5 KiB
Rust
65 lines
2.5 KiB
Rust
//! Test for viewport fix
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#[test]
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#[cfg(feature = "docking")]
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fn test_viewport_fix_works() {
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use imgui::*;
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// Create context without using test helper to avoid premature new_frame
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let mut ctx = Context::create();
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// Initialize IO
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ctx.io_mut().display_size = [1280.0, 720.0];
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ctx.io_mut().delta_time = 1.0 / 60.0;
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// Apply fix BEFORE any frames
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viewport_issue_fix::apply_viewport_fix(&mut ctx);
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// Set platform backend
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struct TestBackend;
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impl PlatformViewportBackend for TestBackend {
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fn create_window(&mut self, _: &mut Viewport) {
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println!("create_window called!");
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}
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fn destroy_window(&mut self, _: &mut Viewport) {}
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fn show_window(&mut self, _: &mut Viewport) {}
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fn set_window_pos(&mut self, _: &mut Viewport, _: [f32; 2]) {}
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fn get_window_pos(&mut self, _: &mut Viewport) -> [f32; 2] { [0.0, 0.0] }
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fn set_window_size(&mut self, _: &mut Viewport, _: [f32; 2]) {}
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fn get_window_size(&mut self, _: &mut Viewport) -> [f32; 2] { [0.0, 0.0] }
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fn set_window_focus(&mut self, _: &mut Viewport) {}
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fn get_window_focus(&mut self, _: &mut Viewport) -> bool { false }
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fn get_window_minimized(&mut self, _: &mut Viewport) -> bool { false }
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fn set_window_title(&mut self, _: &mut Viewport, _: &str) {}
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fn set_window_alpha(&mut self, _: &mut Viewport, _: f32) {}
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fn update_window(&mut self, _: &mut Viewport) {}
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fn render_window(&mut self, _: &mut Viewport) {}
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fn swap_buffers(&mut self, _: &mut Viewport) {}
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fn create_vk_surface(&mut self, _: &mut Viewport, _: u64, _: &mut u64) -> i32 { 0 }
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}
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ctx.set_platform_backend(TestBackend);
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// Build fonts to avoid issues
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ctx.fonts().build_rgba32_texture();
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// First frame
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assert!(ctx.io().config_flags.contains(ConfigFlags::VIEWPORTS_ENABLE));
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let _ui = ctx.new_frame();
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let _dd = ctx.render();
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// Without fix, flags would be reset here
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// With fix, we reapply them
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viewport_issue_fix::apply_viewport_fix(&mut ctx);
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// Second frame - flags should still be set
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assert!(ctx.io().config_flags.contains(ConfigFlags::VIEWPORTS_ENABLE));
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let _ui = ctx.new_frame();
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let _dd = ctx.render();
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// Verify fix continues to work
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viewport_issue_fix::apply_viewport_fix(&mut ctx);
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assert!(ctx.io().config_flags.contains(ConfigFlags::VIEWPORTS_ENABLE));
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println!("Viewport fix test passed!");
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} |