Implement new ProgressBar

Change-Id: Ie5c4b0f4d9bc65e484f08832343ba97fff61a9b6

1 files changed, 123 insertions, 0 deletions

diff --git a/server/src/main/java/com/vaadin/ui/ProgressBar.java b/server/src/main/java/com/vaadin/ui/ProgressBar.java
new file mode 100644
index 0000000000..f06170f677
--- /dev/null
+++ b/server/src/main/java/com/vaadin/ui/ProgressBar.java
@@ -0,0 +1,123 @@
+package com.vaadin.ui;
+
+import org.jsoup.nodes.Element;
+
+import com.vaadin.shared.ui.progressindicator.ProgressBarState;
+import com.vaadin.ui.declarative.DesignAttributeHandler;
+import com.vaadin.ui.declarative.DesignContext;
+
+/**
+ * A component for displaying progress.
+ * <p>
+ * The default mode is to show the current progress internally represented by a
+ * floating point value between 0 and 1 (inclusive). The progress bar can also
+ * be in an indeterminate mode showing an animation indicating that the task is
+ * running but without providing any information about the current progress.
+ *
+ * @since 8.0
+ * @author Vaadin Ltd
+ */
+public class ProgressBar extends AbstractComponent {
+
+    private static final float DEFAULT_VALUE = 0f;
+
+    /**
+     * Creates a new progress bar initially set to 0% progress.
+     */
+    public ProgressBar() {
+        this(DEFAULT_VALUE);
+    }
+
+    /**
+     * Creates a new progress bar with the given initial value.
+     *
+     * @param progress
+     *            the initial progress value
+     */
+    public ProgressBar(float progress) {
+        setValue(Float.valueOf(progress));
+    }
+
+    /**
+     * Gets the value of this progress bar. The value is a <code>float</code>
+     * between 0 and 1 where 0 represents no progress at all and 1 represents
+     * fully completed.
+     *
+     * @return the current progress value
+     */
+    public float getValue() {
+        return getState(false).state;
+    }
+
+    /**
+     * Sets the value of this progress bar. The value is a <code>float</code>
+     * between 0 and 1 where 0 represents no progress at all and 1 represents
+     * fully completed.
+     *
+     * @param newValue
+     *            the current progress value
+     */
+    public void setValue(float newValue) {
+        getState().state = newValue;
+    }
+
+    @Override
+    protected ProgressBarState getState() {
+        return (ProgressBarState) super.getState();
+    }
+
+    @Override
+    protected ProgressBarState getState(boolean markAsDirty) {
+        return (ProgressBarState) super.getState(markAsDirty);
+    }
+
+    /**
+     * Sets whether or not this progress indicator is indeterminate. In
+     * indeterminate mode there is an animation indicating that the task is
+     * running but without providing any information about the current progress.
+     *
+     * @param indeterminate
+     *            <code>true</code> to set to indeterminate mode; otherwise
+     *            <code>false</code>
+     */
+    public void setIndeterminate(boolean indeterminate) {
+        getState().indeterminate = indeterminate;
+    }
+
+    /**
+     * Gets whether or not this progress indicator is indeterminate. In
+     * indeterminate mode there is an animation indicating that the task is
+     * running but without providing any information about the current progress.
+     *
+     * @return <code>true</code> if set to indeterminate mode; otherwise
+     *         <code>false</code>
+     */
+    public boolean isIndeterminate() {
+        return getState(false).indeterminate;
+    }
+
+    @Override
+    public void readDesign(Element design, DesignContext designContext) {
+        super.readDesign(design, designContext);
+        if (design.hasAttr("value") && !design.attr("value").isEmpty()) {
+            setValue(DesignAttributeHandler.readAttribute("value",
+                    design.attributes(), Float.class));
+        }
+    }
+
+    @Override
+    public void writeDesign(Element design, DesignContext designContext) {
+        super.writeDesign(design, designContext);
+        Float defaultValue = ((ProgressBar) designContext
+                .getDefaultInstance(this)).getValue();
+        DesignAttributeHandler.writeAttribute("value", design.attributes(),
+                getValue(), defaultValue, Float.class);
+    }
+
+    /**
+     * Resets the value of this component, effectively displaying zero progress.
+     */
+    public void reset() {
+        setValue(DEFAULT_VALUE);
+    }
+}