Joshua Mark Manton JoshuaManton

## minimal-imgui-sortable-hit-testing.md

      
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                TheSandvichMaker
                / minimal-imgui-sortable-hit-testing.md
            
            
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              September 12, 2025 09:00
            
              
                A minimal solution for hit testing sortable UI widgets in an immediate mode API.
              
          
    If you've ever watched Casey Muratori's original ImGui video you may be familiar with this approach to hit testing in an immediate mode UI:
void ui_set_next_hot(UI_ID id)
{
    ui->next_hot = id;
}

void ui_end_frame()
{

  
## main.odin
package emulator

import "core:os"
import "core:fmt"
import "core:time"
import "core:math/rand"

when ODIN_OS == "windows" do foreign import libc "system:libcmt.lib";
when ODIN_OS == "linux"   do foreign import libc "system:c";
foreign libc {
	package emulator

	import "core:os"
	import "core:fmt"
	import "core:time"
	import "core:math/rand"

	when ODIN_OS == "windows" do foreign import libc "system:libcmt.lib";
	when ODIN_OS == "linux" do foreign import libc "system:c";
	foreign libc {