forked from fanruan/design
plough
6 years ago
13 changed files with 246 additions and 71 deletions
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package com.fr.design.gui.core; |
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/** |
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* 这个接口说明一个基本组件可以设置文本 |
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* Created by plough on 2019/1/11. |
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*/ |
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public interface UITextComponent { |
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String getText(); |
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void setText(String text); |
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} |
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package com.fr.design.utils.gui; |
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import com.fr.design.gui.core.UITextComponent; |
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import com.fr.stable.StringUtils; |
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/** |
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* 包含 UI 组件相关的工具方法 |
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* Created by plough on 2019/1/11. |
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*/ |
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// Noninstantiable utility class
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public class UIComponentUtils { |
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private static final String HTML_TAG_TPL = "<html><body style='width: %dpx'>"; |
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private static final String HTML_BODY_TAG = "<html><body>"; |
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private static final String HTML_TAG = "<html>"; |
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private static final int MIN_WIDTH = 10; |
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// 覆盖缺省构造器，不可实例化
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private UIComponentUtils() { |
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throw new AssertionError(); |
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} |
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/** |
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* 到达指定宽度后换行 |
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*/ |
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public static void setLineWrap(UITextComponent comp, int width) { |
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if (width < MIN_WIDTH) { |
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width = MIN_WIDTH; |
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} |
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insertPrefixToText(comp, String.format(HTML_TAG_TPL, width)); |
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} |
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/** |
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* 自动换行 |
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*/ |
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public static void setLineWrap(UITextComponent comp) { |
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insertPrefixToText(comp, HTML_BODY_TAG); |
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} |
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private static void insertPrefixToText(UITextComponent comp, String prefix) { |
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if (comp == null) { |
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return; |
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} |
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String text = comp.getText(); |
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if (StringUtils.isEmpty(comp.getText()) || text.startsWith(HTML_TAG)) { |
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return; |
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} |
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comp.setText(prefix + comp.getText()); |
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} |
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} |
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@ -0,0 +1,109 @@
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package com.fr.design.utils.gui; |
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import com.fr.design.gui.core.UITextComponent; |
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import com.fr.design.gui.ibutton.UIButton; |
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import com.fr.design.gui.ilable.UILabel; |
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import com.fr.stable.StringUtils; |
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import org.junit.Before; |
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import org.junit.Test; |
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import javax.swing.Icon; |
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import java.awt.Component; |
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import java.awt.Graphics; |
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import static org.junit.Assert.*; |
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/** |
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* Created by plough on 2019/1/11. |
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*/ |
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public class UIComponentUtilsTest { |
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private static final String HTML_TAG_TPL = "<html><body style='width: %dpx'>"; |
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private static final String HTML_TAG = "<html>"; |
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private UIButton textButton; |
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private UIButton emptyTextButton; |
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private UIButton iconButton; |
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private UILabel textLabel; |
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private UILabel emptyTextLabel; |
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private UILabel iconLabel; |
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@Before |
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public void setUp() { |
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textButton = new UIButton("hello"); |
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emptyTextButton = new UIButton(StringUtils.EMPTY); |
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iconButton = new UIButton(createMockIcon()); |
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textLabel = new UILabel("hello"); |
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emptyTextLabel = new UILabel(StringUtils.EMPTY); |
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iconLabel = new UILabel(createMockIcon()); |
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} |
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@Test |
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public void testSetLineWrap() { |
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UITextComponent[] noWrapComps = {emptyTextButton, emptyTextLabel, iconButton, iconLabel}; |
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UITextComponent[] wrapComps = {textLabel, textButton}; |
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for (UITextComponent comp : wrapComps) { |
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UIComponentUtils.setLineWrap(comp); |
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assertTrue(isLineWrapped(comp)); |
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} |
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for (UITextComponent comp : noWrapComps) { |
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UIComponentUtils.setLineWrap(comp); |
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assertFalse(isLineWrapped(comp)); |
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} |
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} |
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@Test |
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public void testSetLineWrapWithLineWidth() { |
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UILabel label1 = new UILabel("l1"); |
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UILabel label2 = new UILabel("l2"); |
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UILabel label3 = new UILabel("l3"); |
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UIComponentUtils.setLineWrap(label1, 50); |
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assertTrue(isLineWrappedWithLineWidth(label1, 50)); |
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UIComponentUtils.setLineWrap(label2, 0); |
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assertTrue(isLineWrappedWithLineWidth(label2, 10)); |
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UIComponentUtils.setLineWrap(label3, -10); |
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assertTrue(isLineWrappedWithLineWidth(label3, 10)); |
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} |
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@Test |
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public void testAddHtmlTwice() { |
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UIComponentUtils.setLineWrap(textLabel, 50); |
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UIComponentUtils.setLineWrap(textLabel, 20); // 第二次应该不生效
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assertTrue(isLineWrappedWithLineWidth(textLabel, 50)); |
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} |
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private boolean isLineWrapped(UITextComponent comp) { |
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String text = comp.getText(); |
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return StringUtils.isNotEmpty(text) && text.startsWith(HTML_TAG); |
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} |
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private boolean isLineWrappedWithLineWidth(UITextComponent comp, int width) { |
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String text = comp.getText(); |
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return StringUtils.isNotEmpty(text) && text.startsWith(String.format(HTML_TAG_TPL, width)); |
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} |
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private Icon createMockIcon() { |
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return new Icon() { |
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@Override |
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public void paintIcon(Component c, Graphics g, int x, int y) { |
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// do nothing
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} |
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@Override |
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public int getIconWidth() { |
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return 0; |
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} |
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@Override |
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public int getIconHeight() { |
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return 0; |
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} |
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}; |
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} |
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} |
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