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<script>
import { createEventDispatcher } from 'svelte';
import Home from './Home.svelte';
import DDA from './algorithms/line-drawing/DDA.svelte';
import Bresenham from './algorithms/line-drawing/Bresenham.svelte';
import Scaling from './algorithms/2d-transformations/Scaling.svelte';
import Translation from './algorithms/2d-transformations/Translation.svelte';
const dispatch = createEventDispatcher();
const changePage = (p) => dispatch('message', { page: p });
</script>
<nav class="ddmenu">
<button on:click={() => changePage(Home)}>Home</button>
<div class="ddgroup">
Line Drawing Algorithms
<div class="ddsub">
<button on:click={() => changePage(DDA)}>
Digital differential analyzer
</button>
<button on:click={() => changePage(Bresenham)}>
Bresenham
</button>
</div>
</div>
<div class="ddgroup">
2 Dimensional Transformations
<div class="ddsub">
<button on:click={() => changePage(Scaling)}>
Scaling
</button>
<button on:click={() => changePage(Translation)}>
Translation
</button>
</div>
</div>
</nav>
<style>
.ddmenu {
display: flex;
padding: 0.2em;
border-bottom: 1px solid var(--bg-alt);
}
.ddmenu button, .ddmenu .ddgroup {
text-align: left;
width: 100%;
padding: 8px;
color: var(--fg-main);
text-decoration: none;
background: var(--bg-alt);
border: 2px solid var(--bg-main);
}
.ddmenu button:hover, .ddmenu .ddgroup:hover {
color: var(--fg-special-cold);
background: var(--bg-dim);
cursor: pointer;
}
.ddmenu .ddgroup { position: relative; }
.ddsub {
width: 100%;
position: absolute;
top: 100%; left: 0;
display: none;
}
.ddsub button {
display: block;
box-sizing: border-box;
}
.ddgroup:hover .ddsub { display: block; }
.ddgroup::after {
content: "\27A4";
position: absolute;
top: 8px; right: 8px;
transition: transform 0.2s;
}
.ddgroup:hover::after {
transform: rotate(90deg);
}
@media screen and (max-width: 640px) {
.ddmenu { flex-wrap: wrap; }
.ddsub {
position: static;
margin-top: 10px;
}
.ddmenu button, .ddmenu .ddgroup {
padding: 12px;
}
}
</style>
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