Pull request #5407: REPORT-57181 【FRM布局推荐】组件复用-自动间距目前么有把小数处理成整数

Merge in DESIGN/design from ~FANGLEI/design10.0:feature/10.0 to feature/10.0

* commit '2018937ad70336f88d8efda4b55afc1570e325c2':
  REPORT-57181 【FRM布局推荐】组件复用-自动间距目前么有把小数处理成整数

designer-form/src/main/java/com/fr/design/mainframe/MultiSelectionArrangement.java

@@ -70,22 +70,22 @@ public class MultiSelectionArrangement {
     // 水平分布，自动，间距由selectedCreators和border共同计算而来
     public void horizontalAutoDistribution() {
         sortHorizontal();
-        int gap = calculateHorizontalGap();
-        horizontalDistribution(gap);
+        int[] gaps = calculateHorizontalGaps();
+        horizontalDistribution(gaps);
     }
 
     // 水平分布，手动，传入一个间距，排列selectedCreators
     public void horizontalManualDistribution(int gap) {
         sortHorizontal();
         reSizeRecByHorizontal(gap);
-        horizontalDistribution(gap);
+        horizontalDistribution(fillGaps(gap, selectedCreators.size() - 1));
     }
 
-    private void horizontalDistribution(int gap) {
+    private void horizontalDistribution(int[] gaps) {
         for (int i = 1; i < selectedCreators.size() - 1; i++) {
             XCreator creator = selectedCreators.get(i);
             XCreator preCreator = selectedCreators.get(i - 1);
-            creator.setLocation(preCreator.getX() + preCreator.getWidth() + gap, creator.getY());
+            creator.setLocation(preCreator.getX() + preCreator.getWidth() + gaps[i - 1], creator.getY());
         }
         update();
     }
@@ -133,34 +133,35 @@ public class MultiSelectionArrangement {
     }
 
     // 计算selectedCreators的均分间距
-    private int calculateHorizontalGap() {
+    private int[] calculateHorizontalGaps() {
         int sum = 0;
         for (XCreator creator : selectedCreators) {
             sum += creator.getWidth();
         }
+        int gapCount = selectedCreators.size() - 1;
         XCreator head = selectedCreators.get(0);
-        XCreator tail = selectedCreators.get(selectedCreators.size() - 1);
+        XCreator tail = selectedCreators.get(gapCount);
         int distanceBetweenHeadAndTailCreators = Math.abs(head.getX() - tail.getX()) + tail.getWidth();
-        return (distanceBetweenHeadAndTailCreators - sum) / (selectedCreators.size() - 1);
+        return calculateIntegerGaps(distanceBetweenHeadAndTailCreators - sum, gapCount);
     }
 
     public void verticalAutoDistribution() {
         sortVertical();
-        int gap = calculateVerticalGap();
-        verticalDistribution(gap);
+        int[] gaps = calculateVerticalGaps();
+        verticalDistribution(gaps);
     }
 
     public void verticalManualDistribution(int gap) {
         sortVertical();
         reSizeRecByVertical(gap);
-        verticalDistribution(gap);
+        verticalDistribution(fillGaps(gap, selectedCreators.size() - 1));
     }
 
-    private void verticalDistribution(int gap) {
+    private void verticalDistribution(int[] gaps) {
         for (int i = 1; i < selectedCreators.size() - 1; i++) {
             XCreator creator = selectedCreators.get(i);
             XCreator preCreator = selectedCreators.get(i - 1);
-            creator.setLocation(creator.getX(), preCreator.getY() + preCreator.getHeight() + gap);
+            creator.setLocation(creator.getX(), preCreator.getY() + preCreator.getHeight() + gaps[i - 1]);
         }
         update();
     }
@@ -207,15 +208,48 @@ public class MultiSelectionArrangement {
         });
     }
 
-    private int calculateVerticalGap() {
+    private int[] calculateVerticalGaps() {
         int sum = 0;
         for (XCreator creator : selectedCreators) {
             sum += creator.getHeight();
         }
+        int gapCount = selectedCreators.size() - 1;
         XCreator head = selectedCreators.get(0);
-        XCreator tail = selectedCreators.get(selectedCreators.size() - 1);
+        XCreator tail = selectedCreators.get(gapCount);
         int distanceBetweenHeadAndTailCreators = Math.abs(head.getY() - tail.getY()) + tail.getHeight();
-        return (distanceBetweenHeadAndTailCreators - sum) / (selectedCreators.size() - 1);
+        return calculateIntegerGaps(distanceBetweenHeadAndTailCreators - sum, gapCount);
+    }
+
+    private int[] calculateIntegerGaps(int gapTotalSize, int gapCount) {
+        int finalGap[] = new int[gapCount];
+        // gapTotalSize: 原先的所有未取整的gap的总和，是一个整数
+        int intGap = Math.round((float) gapTotalSize / gapCount);
+        // 把所有取整的gap求和，得到的整数gap
+        int intTotalSize = intGap * (gapCount);
+        // 求差，可以知道总误差
+        int difference = intTotalSize - gapTotalSize;
+        // 遍历,由于取整是四舍五入得到的，取整后每个gap和取整前的gap最多相差0.5，故difference绝对值小于gapCount的
+        for (int i = 0; i < gapCount; i++) {
+            if (i < Math.abs(difference)) {
+                if (difference < 0) {
+                    // 说明取整后gap总误差小于取整前总gap，一个个加1补上
+                    finalGap[i] = intGap + 1;
+                } else {
+                    // 说明取整后gap总误差大于取整前总gap，一个个减1去掉
+                    finalGap[i] = intGap - 1;
+                }
+            } else {
+                finalGap[i] = intGap;
+            }
+        }
+        return finalGap;
+    }
+
+    // 创建用gap填满一个size大小的数组
+    private int[] fillGaps(int gap, int size) {
+        int[] gaps = new int[size];
+        Arrays.fill(gaps, gap);
+        return gaps;
     }
 
     private void update() {