added feature that clearing current selection if max selectable is 1 z…

…hihu#808
luowenyue · Feb 8, 2022 · 8d742fb · 8d742fb
1 parent 47023f1
commit 8d742fb
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Showing 3 changed files with 22 additions and 1 deletion.
diff --git a/matisse/src/main/java/com/zhihu/matisse/SelectionCreator.java b/matisse/src/main/java/com/zhihu/matisse/SelectionCreator.java
@@ -346,6 +346,17 @@ public SelectionCreator setOnCheckedListener(@Nullable OnCheckedListener listene
         return this;
     }
 
+    /**
+     * Set if selection should change on case where maxSelectable is 1
+     *
+     * @param changeSelectionOnSelectingOne
+     * @return {@link SelectionCreator} for fluent API.
+     */
+    public SelectionCreator setChangeSelectionOnSelectingOne(boolean changeSelectionOnSelectingOne) {
+        mSelectionSpec.changeSelectionOnSelectingOne = changeSelectionOnSelectingOne;
+        return this;
+    }
+
     /**
      * Start to select media and wait for result.
      *

diff --git a/matisse/src/main/java/com/zhihu/matisse/internal/entity/SelectionSpec.java b/matisse/src/main/java/com/zhihu/matisse/internal/entity/SelectionSpec.java
@@ -61,6 +61,7 @@ public final class SelectionSpec {
     public boolean showPreview;
     public Drawable audioThumbnail;
     public Drawable audioPlaceholder;
+    public boolean changeSelectionOnSelectingOne;
 
     private SelectionSpec() {
     }
@@ -100,6 +101,7 @@ private void reset() {
         showPreview = true;
         audioThumbnail = null;
         audioPlaceholder = null;
+        changeSelectionOnSelectingOne = false;
     }
 
     public boolean singleSelectionModeEnabled() {

diff --git a/matisse/src/main/java/com/zhihu/matisse/internal/model/SelectedItemCollection.java b/matisse/src/main/java/com/zhihu/matisse/internal/model/SelectedItemCollection.java
@@ -177,7 +177,10 @@ public boolean isSelected(Item item) {
     }
 
     public IncapableCause isAcceptable(Item item) {
-        if (maxSelectableReached()) {
+        if (shouldRemoveSelection()) {
+            mItems.clear();
+        }
+        else if (maxSelectableReached()) {
             int maxSelectable = currentMaxSelectable();
             String cause;
 
@@ -211,6 +214,11 @@ public boolean maxSelectableReached() {
         return mItems.size() == currentMaxSelectable();
     }
 
+    public boolean shouldRemoveSelection() {
+        SelectionSpec spec = SelectionSpec.getInstance();
+        return mItems.size() == 1 && currentMaxSelectable() == 1 && spec.changeSelectionOnSelectingOne;
+    }
+
     // depends
     private int currentMaxSelectable() {
         SelectionSpec spec = SelectionSpec.getInstance();