Add Dialog.js file, apparently

1 files changed, 37 insertions, 0 deletions

diff --git a/ui/Dialog.js b/ui/Dialog.js
new file mode 100644
index 0000000..26d94d8
--- /dev/null
+++ b/ui/Dialog.js
@@ -0,0 +1,37 @@
+const FocusElement = require('./form/FocusElement')
+
+const Pane = require('./Pane')
+
+const telc = require('../util/telchars')
+
+module.exports = class Dialog extends FocusElement {
+  // A simple base dialog.
+  //
+  // Emits the 'cancelled' event when the cancel key (escape) is pressed,
+  // which should (probably) be handled by the dialog's creator.
+  //
+  // Doesn't do anything when focused by default - this should be overridden
+  // in subclasses.
+  //
+  // Automatically adjusts to fill its parent. Has a pane child (this.pane),
+  // but the pane isn't adjusted at all (you should change its size and
+  // likely center it in your subclass).
+
+  constructor() {
+    super()
+
+    this.pane = new Pane()
+    this.addChild(this.pane)
+  }
+
+  fixLayout() {
+    this.w = this.parent.contentW
+    this.h = this.parent.contentH
+  }
+
+  keyPressed(keyBuf) {
+    if (telc.isCancel(keyBuf)) {
+      this.emit('cancelled')
+    }
+  }
+}