优化tableView控件横向拖动滑块的显示

sources/TableView.cpp

@@ -1,4 +1,4 @@
-#include "TableView.h"
+#include "TableView.h"
 
 namespace ezui {
 
@@ -240,6 +240,11 @@ namespace ezui {
 			g.DrawRectangle(RectF(firstColRect));
 		}
 
+		int headerClipWidth = Width() - m_firstColumnWidth;
+		if (headerClipWidth > 0) {
+			g.PushAxisAlignedClip(RectF((float)m_firstColumnWidth, 0.0f, (float)headerClipWidth, (float)m_headerHeight));
+		}
+
 		// 绘制数据列表头
 		int x = m_firstColumnWidth - m_scrollOffsetX;
 		for (int i = 0; i < (int)m_columns.size(); ++i) {
@@ -277,9 +282,14 @@ namespace ezui {
 
 			x += col.Width;
 		}
+
+		if (headerClipWidth > 0) {
+			g.PopAxisAlignedClip();
+		}
 	}
 
 	void TableView::DrawCells(PaintEventArgs& args) {
+		auto& g = args.Graphics;
 		int startY = m_headerHeight;
 		
 		for (int row = 0; row < (int)m_data.size(); ++row) {
@@ -295,6 +305,11 @@ namespace ezui {
 			Rect firstColRect(0, rowY, m_firstColumnWidth, rowHeight);
 			DrawFirstColumn(args, row, firstColRect);
 
+			int rowClipWidth = Width() - m_firstColumnWidth;
+			if (rowClipWidth > 0) {
+				g.PushAxisAlignedClip(RectF((float)m_firstColumnWidth, (float)rowY, (float)rowClipWidth, (float)rowHeight));
+			}
+
 			// 绘制数据列
 			int x = m_firstColumnWidth - m_scrollOffsetX;
 			for (int col = 0; col < (int)m_columns.size(); ++col) {
@@ -310,6 +325,10 @@ namespace ezui {
 				DrawCell(args, row, col, cellRect);
 				x += colWidth;
 			}
+
+			if (rowClipWidth > 0) {
+				g.PopAxisAlignedClip();
+			}
 		}
 	}