添加打印按钮

src/components/exam/ExamSignPanel.tsx

@@ -1119,7 +1119,20 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
                 padding: 0;
               }
               .print-button {
-                display: none;
+                position: fixed;
+                top: 20px;
+                right: 20px;
+                padding: 10px 20px;
+                background-color: #2563eb;
+                color: white;
+                border: none;
+                border-radius: 4px;
+                cursor: pointer;
+                font-size: 16px;
+                z-index: 1000;
+              }
+              .print-button:hover {
+                background-color: #1d4ed8;
               }
               img {
                 display: block;
@@ -1220,7 +1233,20 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
                 padding: 0;
               }
               .print-button {
-                display: none;
+                position: fixed;
+                top: 20px;
+                right: 20px;
+                padding: 10px 20px;
+                background-color: #2563eb;
+                color: white;
+                border: none;
+                border-radius: 4px;
+                cursor: pointer;
+                font-size: 16px;
+                z-index: 1000;
+              }
+              .print-button:hover {
+                background-color: #1d4ed8;
               }
               img {
                 display: block;
@@ -1376,6 +1402,41 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
         }
       }
 
+      // 处理加项单（如果有且已签名）
+      if (addItemBillUrl && isAddItemBillSigned) {
+        try {
+          const response = await fetch(addItemBillUrl);
+          if (response.ok) {
+            const blob = await response.blob();
+            const arrayBuffer = await blob.arrayBuffer();
+
+            const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
+
+            for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
+              const page = await pdf.getPage(pageNum);
+              const viewport = page.getViewport({ scale });
+
+              const canvas = document.createElement('canvas');
+              const context = canvas.getContext('2d');
+              if (!context) continue;
+
+              canvas.height = viewport.height;
+              canvas.width = viewport.width;
+
+              const renderContext = {
+                canvasContext: context,
+                viewport: viewport,
+              } as any;
+
+              await page.render(renderContext).promise;
+              allImages.push(canvas.toDataURL('image/png'));
+            }
+          }
+        } catch (err) {
+          console.error('处理加项单失败', err);
+        }
+      }
+
       if (allImages.length === 0) {
         alert('没有可打印的内容');
         return;
@@ -1416,7 +1477,20 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
                 padding: 0;
               }
               .print-button {
-                display: none;
+                position: fixed;
+                top: 20px;
+                right: 20px;
+                padding: 10px 20px;
+                background-color: #2563eb;
+                color: white;
+                border: none;
+                border-radius: 4px;
+                cursor: pointer;
+                font-size: 16px;
+                z-index: 1000;
+              }
+              .print-button:hover {
+                background-color: #1d4ed8;
               }
               img {
                 display: block;