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xo-imgui: ex2: refactor + floating divider

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This commit is contained in:
Roland Conybeare 2025-08-24 13:58:19 -04:00
commit 9afed4371f
1 changed files with 55 additions and 12 deletions
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67
xo-imgui/example/ex2/imgui_ex2.cpp
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@ -34,6 +34,10 @@
using xo::gc::generation;
ImVec2 operator+(const ImVec2 & p1, const ImVec2 & p2) {
return ImVec2(p1.x + p2.x, p1.y + p2.y);
}
struct ImRect {
ImRect() = default;
ImRect(const ImVec2 & tl, const ImVec2 & br) : top_left_{tl}, bottom_right_{br} {}
@ -904,12 +908,11 @@ draw_gc_history(const GcStateDescription & gcstate,
}
void
draw_gc_state(const AppState & app_state,
const GcStateDescription & gcstate,
const ImRect & canvas_rect,
ImDrawList * draw_list,
ImRect * p_nursery_alloc_rect,
ImRect * p_tenured_alloc_rect)
draw_gc_alloc_state(const GcStateDescription & gcstate,
const ImRect & canvas_rect,
ImDrawList * draw_list,
ImRect * p_nursery_alloc_rect,
ImRect * p_tenured_alloc_rect)
{
float lm = 50;
float rm = 70;
@ -917,11 +920,6 @@ draw_gc_state(const AppState & app_state,
float est_chart_text_height = 14;
float h = 20; // chart bar height
// draw stuff
draw_list->AddRect(canvas_rect.top_left(),
canvas_rect.bottom_right(),
IM_COL32(255, 255, 255, 255));
/* bounding rectange for nursery display */
ImRect N_space_rect(ImVec2(canvas_rect.x_lo() + lm,
canvas_rect.y_lo() + tm),
@ -1010,6 +1008,51 @@ draw_gc_state(const AppState & app_state,
if (p_tenured_alloc_rect)
*p_tenured_alloc_rect = T_alloc_rect;
} /*draw_gc_alloc_state*/
void
draw_gc_state(const AppState & app_state,
const GcStateDescription & gcstate,
const ImRect & canvas_rect,
ImDrawList * draw_list,
ImRect * p_nursery_alloc_rect,
ImRect * p_tenured_alloc_rect)
{
// draw stuff
draw_list->AddRect(canvas_rect.top_left(),
canvas_rect.bottom_right(),
IM_COL32(255, 255, 255, 255));
/* TODO: does this reset coord space? */
ImGui::BeginChild("top pane", ImVec2(0, 105), ImGuiChildFlags_Border | ImGuiChildFlags_ResizeY);
ImRect alloc_rect(canvas_rect.top_left() + ImGui::GetWindowContentRegionMin(),
canvas_rect.top_left() + ImGui::GetWindowContentRegionMax());
draw_list->PushClipRect(alloc_rect.top_left(), alloc_rect.bottom_right());
draw_gc_alloc_state(gcstate,
alloc_rect,
draw_list,
p_nursery_alloc_rect,
p_tenured_alloc_rect);
draw_list->PopClipRect();
ImGui::EndChild();
/* BeginChild() again ? */
ImRect history_rect(alloc_rect.bottom_left() + ImGui::GetWindowContentRegionMin(),
alloc_rect.bottom_left() + ImGui::GetWindowContentRegionMax());
float lm = 50;
float rm = 70;
float tm = 10;
std::size_t x0 = history_rect.x_lo() + lm;
std::size_t x1 = history_rect.x_hi() - rm;
std::size_t h_y0 = history_rect.y_lo() + tm;
/* just incremental (nursery) collections */
draw_gc_history(gcstate,
generation::nursery,
@ -1217,7 +1260,7 @@ int main(int, char **)
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &major);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, &minor);
std::cerr << "Requested OpenGL version: " << major << "." << minor << std::endl;
std::cerr << "Requested OpenGL vtersion: " << major << "." << minor << std::endl;
if (gl_context) {
std::cerr << "SDL_GL_CreateContext done" << std::endl;