Edit2D/interface.odin

#+feature dynamic-literals
package edit2d
import im "shared:odin-imgui"
import mu "vendor:microui"
import e2_glyph "./glyph"
import "core:fmt"
import "vendor:glfw"
import b2 "vendor:box2d"

/*
	This library will only account for box2d's entities editing

	It only deals with one world_id, which means typically one level

	All the interface follows a pattern
	i.e.  It takes interface_state pointer and returns a boolean indicating weather the world needs to be reloaded


	Interface should handle microui

*/

EditMode :: enum 
{
	ENTITY,
	VERTICES,
	OVERVIEW,
	CHAIN,
	JOINT,
}

interface_state :: struct
{
	entity_defs       : [dynamic]^engine_entity_def,
	entities          : [dynamic]^engine_entity,
	selected_entity   : i32,
	world             : ^engine_world,
	state             : ^engine_state,

	vertex_index      : ^i32,
	chain_index       : ^i32,
	
	edit_mode         : EditMode,

	curr_joint_index  : i32,
	curr_joint_type   : b2.JointType,

	curr_static_index : static_index_global,
}



key_map : map[i32]mu.Key = {
	glfw.KEY_LEFT_SHIFT   = .SHIFT,
	glfw.KEY_RIGHT_SHIFT  = .SHIFT,
	glfw.KEY_LEFT_CONTROL = .CTRL,
	glfw.KEY_RIGHT        = .CTRL,
	glfw.KEY_LEFT_ALT     = .ALT,
	glfw.KEY_RIGHT_ALT    = .ALT,
	glfw.KEY_BACKSPACE    = .BACKSPACE,
	glfw.KEY_DELETE       = .DELETE,
	glfw.KEY_ENTER        = .RETURN,
	glfw.KEY_LEFT         = .LEFT,
	glfw.KEY_RIGHT        = .RIGHT,
	glfw.KEY_HOME         = .HOME,
	glfw.KEY_END          = .END,
	glfw.KEY_A            = .A,
	glfw.KEY_X            = .X,
	glfw.KEY_C            = .C,
	glfw.KEY_V            = .V
}

mouse_map : map[i32]mu.Mouse = {
	glfw.MOUSE_BUTTON_LEFT  = .LEFT,
	glfw.MOUSE_BUTTON_RIGHT = .RIGHT,
	glfw.MOUSE_BUTTON_MIDDLE= .MIDDLE,
}



//interface_get_font

mui_text_width :: proc(font: mu.Font, str: string) -> i32
{
	glyph := cast(^e2_glyph.GlyphState)font
	return i32(len(str)) * i32(glyph.font_size_pt)
}

mui_text_height :: proc(font: mu.Font) -> i32
{
	glyph := cast(^e2_glyph.GlyphState)font
	return  i32(glyph.font_size_pt)
}


interface_get_default :: proc(interface: ^interface_state)
{
	interface.selected_entity  = 0
	interface.vertex_index     = new(i32)
	interface.vertex_index^    = 0
	interface.chain_index      = new(i32)
	interface.chain_index^     = 0
}

/*
interface_draw_options :: proc(state: ^engine_state) 
{
	debug_draw := &state.debug_draw

	im.SliderFloat("Zoom",           &state.draw.cam.zoom, 0, 100)
	im.Checkbox("Shapes",            &debug_draw.drawShapes)
	im.Checkbox("Joints",            &debug_draw.drawJoints)
	im.Checkbox("Joint Extras",      &debug_draw.drawJointExtras)
	im.Checkbox("Bounds",            &debug_draw.drawBounds)
	im.Checkbox("Contact Points",    &debug_draw.drawContacts)
	im.Checkbox("Contact Normals",   &debug_draw.drawContactNormals)
	im.Checkbox("Contact Inpulses",  &debug_draw.drawContactImpulses)
	im.Checkbox("Contact Features",  &debug_draw.drawContactFeatures)
	im.Checkbox("Friction Inpulses", &debug_draw.drawFrictionImpulses)
	im.Checkbox("Mass ",             &debug_draw.drawMass)
	im.Checkbox("Body Names",        &debug_draw.drawBodyNames)
	im.Checkbox("Graph Colors",      &debug_draw.drawGraphColors)
	im.Checkbox("Islands ",          &debug_draw.drawIslands)
	im.SliderFloat("Rotation",       &state.draw.cam.rotation, 0, 360)
}
*/

mu_interface_game_mode :: proc(state: ^engine_state, interface: ^interface_state)
{
	if mu.begin_window(&state.mu_ctx, "Edit Mode", {1630, 0, 250, 170})
	{
    for type in EditMode
    {
    	b : bool = interface.edit_mode == type
      if .CHANGE in mu.checkbox(&state.mu_ctx, fmt.tprint(type), &b) do interface.edit_mode = type
    }
		mu.end_window(&state.mu_ctx)
	}
}

mu_interface_draw_options :: proc(state: ^engine_state) 
{
	if mu.begin_window(&state.mu_ctx, "Options", {200, 150, 200, 400}){
		debug_draw := &state.debug_draw

		mu.label(&state.mu_ctx, "Zoom")
		mu.slider(&state.mu_ctx, &state.draw.cam.zoom,0, 100)

		mu.checkbox(&state.mu_ctx, "Shapes",            &debug_draw.drawShapes)
		mu.checkbox(&state.mu_ctx, "Joints",            &debug_draw.drawJoints)
		mu.checkbox(&state.mu_ctx, "Joint Extras",      &debug_draw.drawJointExtras)
		mu.checkbox(&state.mu_ctx, "Bounds",            &debug_draw.drawBounds)
		mu.checkbox(&state.mu_ctx, "Contact Points",    &debug_draw.drawContacts)
		mu.checkbox(&state.mu_ctx, "Contact Normals",   &debug_draw.drawContactNormals)
		mu.checkbox(&state.mu_ctx, "Contact Inpulses",  &debug_draw.drawContactImpulses)
		mu.checkbox(&state.mu_ctx, "Contact Features",  &debug_draw.drawContactFeatures)
		mu.checkbox(&state.mu_ctx, "Friction Inpulses", &debug_draw.drawFrictionImpulses)
		mu.checkbox(&state.mu_ctx, "Mass ",             &debug_draw.drawMass)
		mu.checkbox(&state.mu_ctx, "Body Names",        &debug_draw.drawBodyNames)
		mu.checkbox(&state.mu_ctx, "Graph Colors",      &debug_draw.drawGraphColors)
		mu.checkbox(&state.mu_ctx, "Islands ",          &debug_draw.drawIslands)

		mu.label(&state.mu_ctx, "Rotation")
		mu.slider(&state.mu_ctx,    &state.draw.cam.rotation, 0, 360)

		mu.end_window(&state.mu_ctx)
	}
}


interface_all :: proc(interface: ^interface_state) -> bool 
{
	ret := false
	if interface.selected_entity <0
	{
		interface.selected_entity = 0
	}

	state := interface.state
	mu.begin(&state.mu_ctx)

	//test_window(&state.mu_ctx)
	mu_interface_draw_options(interface.state)
	mu_interface_game_mode(state, interface)

	if im.Begin("Box2d interface") 
	{
		if im.BeginTabBar("Tabs") 
		{

			if mu.begin_window(&state.mu_ctx, "B2d Interface", {1630, 170, 250, 450})
			{
				if .ACTIVE in mu.header(&state.mu_ctx, "Entity", {.AUTO_SIZE})
				{
					if interface_entity(interface) do ret = true
				}
				mu.end_window(&state.mu_ctx)
			}

			if im.BeginTabItem("Joints", nil, {})
			{
				if interface_joints(interface) do ret = true
				im.EndTabItem()
			}

			im.EndTabBar()
		}
	}
	mu.end(&state.mu_ctx)
	im.End()
	return ret
}