feat: 添加无识别结果提示

添加无识别结果提示

Log: 识别结果展示相关
Change-Id: I74847ee2847175b8de0f6ec49a0a086cb1cdacc3

src/mainwidget.cpp

@@ -107,11 +107,22 @@ void MainWidget::setupUi(QWidget *Widget)
     if (!m_imageview) {
         m_imageview = new ImageView();
     }
+
+    m_resultWidget = new QStackedWidget(this);
+    m_resultWidget->setFocusPolicy(Qt::NoFocus);
+    m_resultWidget->addWidget(m_plainTextEdit);
+
+    m_noResult = new DLabel(this);
+    m_noResult->setAlignment(Qt::AlignCenter);
+    m_noResult->setText(tr("No text recognized"));
+
+    m_resultWidget->addWidget(m_noResult);
+
     QSplitter *mainSplitter = new QSplitter(Qt::Horizontal); //新建水平分割器
     mainSplitter->setHandleWidth(1);//分割线的宽度
     mainSplitter->setChildrenCollapsible(false);//不允许把分割出的子窗口拖小到0，最小值被限定为sizeHint或maxSize/minSize
     mainSplitter->addWidget(m_imageview);//把ui中拖出的各个控件拿走，放到分割器里面
-    mainSplitter->addWidget(m_plainTextEdit);
+    mainSplitter->addWidget(m_resultWidget);
     QList<int> list;
     list << 600 << 250;
     mainSplitter->setSizes(list);
@@ -287,17 +298,28 @@ void MainWidget::openImage(const QImage &img)
 void MainWidget::loadHtml(const QString &html)
 {
     if (!html.isEmpty()) {
+        m_resultWidget->setCurrentWidget(m_plainTextEdit);
         m_plainTextEdit->appendHtml(html);
+    } else {
+        resultEmpty();
     }
 }
 
 void MainWidget::loadString(const QString &string)
 {
     if (!string.isEmpty()) {
+        m_resultWidget->setCurrentWidget(m_plainTextEdit);
         m_plainTextEdit->appendPlainText(string);
+    } else {
+        resultEmpty();
     }
 }
 
+void MainWidget::resultEmpty()
+{
+    m_resultWidget->setCurrentWidget(m_noResult);
+}
+
 void MainWidget::resizeEvent(QResizeEvent *event)
 {
     return DWidget::resizeEvent(event);

src/mainwidget.h

@@ -8,6 +8,7 @@
 #include <DGuiApplicationHelper>
 
 #include <QMutex>
+#include <QStackedWidget>
 
 #include "resulttextview.h"
 #include "textloadwidget.h"
@@ -42,6 +43,7 @@ public:
 
     void loadHtml(const QString &html);
     void loadString(const QString &string);
+    void resultEmpty();
 
 protected:
     void resizeEvent(QResizeEvent *event);
@@ -75,6 +77,9 @@ private:
     QMutex m_mutex;
     RecognitionResult m_result;
     QImage *m_currentImg{nullptr};
+
+    QStackedWidget *m_resultWidget{nullptr};
+    DLabel *m_noResult{nullptr};
 signals:
     void sigResult(const QString &);