properly cancel pending searchs and scroll to bottom after refresh

1 files changed, 52 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/ui/util/ListViewUtils.java b/src/main/java/de/pixart/messenger/ui/util/ListViewUtils.java
new file mode 100644
index 000000000..c35ec3724
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/ui/util/ListViewUtils.java
@@ -0,0 +1,52 @@
+/*
+* Copyright (c) 2018, Daniel Gultsch All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice, this
+* list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation and/or
+* other materials provided with the distribution.
+*
+* 3. Neither the name of the copyright holder nor the names of its contributors
+* may be used to endorse or promote products derived from this software without
+* specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+package de.pixart.messenger.ui.util;
+
+import android.view.View;
+import android.widget.ListView;
+
+public class ListViewUtils {
+    public static void scrollToBottom(final ListView listView) {
+        int count = listView.getAdapter().getCount();
+        if (count > 0) {
+            setSelection(listView, count - 1, true);
+        }
+    }
+
+    public static void setSelection(final ListView listView, int pos, boolean jumpToBottom) {
+        if (jumpToBottom) {
+            final View lastChild = listView.getChildAt(listView.getChildCount() - 1);
+            if (lastChild != null) {
+                listView.setSelectionFromTop(pos, -lastChild.getHeight());
+                return;
+            }
+        }
+        listView.setSelection(pos);
+    }
+}
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