Add the Display Filter Expression dialog.

Changes from the GTK+ UI:
- The display filter is built on the fly with immediate syntax feedback.
- Slightly different layout.
- You can search for fields.

Make the plain SyntaxLineEdit a bit more plain.

Bug: 11128
Change-Id: I06a48cd7b9ba7b9dc193b0199540aede4eb62fa7
Reviewed-on: https://code.wireshark.org/review/8742
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/ui/qt/syntax_line_edit.cpp b/ui/qt/syntax_line_edit.cpp
index ac1b029a9f..282d969edd 100644
--- a/ui/qt/syntax_line_edit.cpp
+++ b/ui/qt/syntax_line_edit.cpp
@@ -115,6 +115,24 @@ void SyntaxLineEdit::setStyleSheet(const QString &style_sheet) {
     QLineEdit::setStyleSheet(style_sheet_ + state_style_sheet_);
 }
 
+void SyntaxLineEdit::insertFilter(const QString &filter)
+{
+    QString padded_filter = filter;
+
+    if (hasSelectedText()) {
+        backspace();
+    }
+
+    int pos = cursorPosition();
+    if (pos > 0 && !text().at(pos - 1).isSpace()) {
+        padded_filter.prepend(" ");
+    }
+    if (pos < text().length() - 1 && !text().at(pos + 1).isSpace()) {
+        padded_filter.append(" ");
+    }
+    insert(padded_filter);
+}
+
 void SyntaxLineEdit::checkDisplayFilter(QString filter)
 {
     if (filter.isEmpty()) {