diff --git a/ui/src/components/calendar/CalendarDoor.vue b/ui/src/components/calendar/CalendarDoor.vue
index 1b895ce..2a161d8 100644
--- a/ui/src/components/calendar/CalendarDoor.vue
+++ b/ui/src/components/calendar/CalendarDoor.vue
@@ -1,5 +1,10 @@
 <template>
-  <SVGRect :rectangle="door.position" @click.left="on_click" />
+  <SVGRect
+    style="cursor: pointer"
+    :rectangle="door.position"
+    @click.left="on_click"
+  >
+  </SVGRect>
 </template>
 
 <script lang="ts">
@@ -32,9 +37,3 @@ export default class extends Vue {
   }
 }
 </script>
-
-<style scoped>
-rect {
-  cursor: pointer;
-}
-</style>
diff --git a/ui/src/components/calendar/SVGRect.vue b/ui/src/components/calendar/SVGRect.vue
index 51206f5..17c59b2 100644
--- a/ui/src/components/calendar/SVGRect.vue
+++ b/ui/src/components/calendar/SVGRect.vue
@@ -1,5 +1,22 @@
 <template>
+  <foreignObject
+    :x="Math.round(parent_aspect_ratio * rectangle.left)"
+    :y="rectangle.top"
+    :width="Math.round(parent_aspect_ratio * rectangle.width)"
+    :height="rectangle.height"
+    :style="`transform: scaleX(${1 / parent_aspect_ratio})`"
+  >
+    <div
+      v-if="variant !== undefined"
+      xmlns="http://www.w3.org/1999/xhtml"
+      class="px-4 is-flex is-align-items-center is-justify-content-center is-size-1 has-text-weight-bold"
+    >
+      <slot name="default" />
+    </div>
+  </foreignObject>
   <rect
+    ref="rect"
+    v-bind="$attrs"
     :class="variant !== undefined ? variant : ''"
     :x="rectangle.left"
     :y="rectangle.top"
@@ -12,7 +29,13 @@
 import { Rectangle } from "@/lib/rectangle";
 import { Options, Vue } from "vue-class-component";
 
-type RectColor = "primary" | "link" | "info" | "success" | "warning" | "danger";
+type BulmaVariant =
+  | "primary"
+  | "link"
+  | "info"
+  | "success"
+  | "warning"
+  | "danger";
 
 @Options({
   props: {
@@ -24,14 +47,56 @@ type RectColor = "primary" | "link" | "info" | "success" | "warning" | "danger";
   },
 })
 export default class extends Vue {
-  public variant?: RectColor;
+  public variant?: BulmaVariant;
   public rectangle!: Rectangle;
+
+  private refreshKey = 0;
+
+  declare $refs: {
+    rect: unknown;
+  };
+
+  private refresh() {
+    window.setTimeout(() => {
+      // don't loop endlessly
+      if (this.refreshKey < 10000) {
+        this.refreshKey++;
+      }
+    }, 100);
+  }
+
+  public get parent_aspect_ratio(): number {
+    this.refreshKey; // read it just to force recompute on change
+
+    if (
+      !(this.$refs.rect instanceof SVGRectElement) ||
+      this.$refs.rect.parentElement === null
+    ) {
+      this.refresh();
+      return 1;
+    }
+
+    const parent = this.$refs.rect.parentElement;
+    const result = parent.clientWidth / parent.clientHeight;
+
+    // force recompute for suspicious results
+    if (result === 0 || result === Infinity) {
+      this.refresh();
+      return 1;
+    }
+
+    return result;
+  }
 }
 </script>
 
 <style lang="scss" scoped>
 @import "@/bulma-vars";
 
+foreignObject > div {
+  height: inherit;
+}
+
 rect {
   fill: transparent;
   fill-opacity: 0.3;
diff --git a/ui/src/components/editor/PreviewDoor.vue b/ui/src/components/editor/PreviewDoor.vue
index a56e6d3..c313db2 100644
--- a/ui/src/components/editor/PreviewDoor.vue
+++ b/ui/src/components/editor/PreviewDoor.vue
@@ -1,35 +1,24 @@
 <template>
   <SVGRect
+    style="cursor: text"
     :rectangle="door.position"
     :variant="editing ? 'success' : 'primary'"
-  />
-  <foreignObject
-    :x="Math.round(parent_aspect_ratio * door.position.left)"
-    :y="door.position.top"
-    :width="Math.round(parent_aspect_ratio * door.position.width)"
-    :height="door.position.height"
-    :style="`transform: scaleX(${1 / parent_aspect_ratio})`"
+    @click.left="on_click"
   >
-    <div
-      xmlns="http://www.w3.org/1999/xhtml"
-      class="px-4 is-flex is-align-items-center is-justify-content-center"
-      @click.left="on_click"
-    >
-      <input
-        v-if="editing"
-        v-model="day_str"
-        ref="day_input"
-        class="input is-large"
-        type="number"
-        :min="MIN_DAY"
-        placeholder="Tag"
-        @keydown="on_keydown"
-      />
-      <div v-else class="is-size-1 has-text-weight-bold has-text-danger">
-        {{ door.day > 0 ? door.day : "*" }}
-      </div>
+    <input
+      v-if="editing"
+      v-model="day_str"
+      ref="day_input"
+      class="input is-large"
+      type="number"
+      :min="MIN_DAY"
+      placeholder="Tag"
+      @keydown="on_keydown"
+    />
+    <div v-else class="has-text-danger">
+      {{ door.day > 0 ? door.day : "*" }}
     </div>
-  </foreignObject>
+  </SVGRect>
 </template>
 
 <script lang="ts">
@@ -52,48 +41,18 @@ export default class extends Vue {
 
   public day_str = "";
   public editing = false;
-  private refreshKey = 0;
 
   declare $refs: {
     day_input: HTMLInputElement | unknown;
   };
 
-  private refresh() {
-    window.setTimeout(() => {
-      // don't loop endlessly
-      if (this.refreshKey < 10000) {
-        this.refreshKey++;
-      }
-    }, 100);
-  }
-
-  public get parent_aspect_ratio(): number {
-    this.refreshKey; // read it just to force recompute on change
-
-    if (!(this.$el instanceof Text) || this.$el.parentElement === null) {
-      this.refresh();
-      return 1;
-    }
-
-    const parent = this.$el.parentElement;
-    const result = parent.clientWidth / parent.clientHeight;
-
-    // force recompute for suspicious results
-    if (result === 0 || result === Infinity) {
-      this.refresh();
-      return 1;
-    }
-
-    return result;
-  }
-
   private toggle_editing() {
     this.day_str = String(this.door.day);
     this.editing = !this.editing;
   }
 
   public on_click(event: MouseEvent) {
-    if (event.target === null || !(event.target instanceof HTMLDivElement)) {
+    if (event.target === null || !(event.target instanceof SVGRectElement)) {
       return;
     }
 
@@ -131,13 +90,3 @@ export default class extends Vue {
   }
 }
 </script>
-
-<style lang="scss" scoped>
-foreignObject {
-  cursor: text;
-
-  > div {
-    height: inherit;
-  }
-}
-</style>