1 files changed, 54 insertions, 0 deletions
diff --git a/library/src/main/java/moe/yuuta/flow/Header.java b/library/src/main/java/moe/yuuta/flow/Header.java
new file mode 100644
index 0000000..42d9124
--- /dev/null
+++ b/library/src/main/java/moe/yuuta/flow/Header.java
@@ -0,0 +1,54 @@
+package moe.yuuta.flow;
+
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+
+class Header {
+    public enum WhichView {
+        TITLE,
+        SUBTITLE
+    }
+
+    private ViewGroup mRoot;
+    private TextView mTitle;
+    private TextView mSubtitle;
+    private ProgressBar mProgressBar;
+
+    Header() {}
+
+    Header(@NonNull ViewGroup root) {
+        attach(root);
+    }
+
+    /**
+     * The config will be reset after re-attaching.
+     */
+    void attach(@NonNull ViewGroup root) {
+        mRoot = root;
+        mTitle = mRoot.findViewById(R.id.flow_header_title);
+        mSubtitle = mRoot.findViewById(R.id.flow_header_subtitle);
+        mProgressBar = mRoot.findViewById(R.id.flow_header_progressbar);
+    }
+
+    @NonNull
+    private TextView getText(@NonNull WhichView position) {
+        switch (position) {
+            case TITLE:
+                return mTitle;
+            case SUBTITLE:
+                return mSubtitle;
+            default:
+                throw new IllegalArgumentException("Unexpected position");
+        }
+    }
+
+    void applyInfo(@NonNull HeaderConfig config) {
+        mTitle.setText(config.getTitleText());
+        mSubtitle.setText(config.getSubtitleText());
+        mProgressBar.setVisibility(config.getShowProgressBar() ? View.VISIBLE : View.GONE);
+    }
+}