[LyX/master] Only fix simple search height if there are no other widgets in the dock area (#13005)

[Juergen Spitzmueller]

commit 6f4054222ce42ee49294e7a778842c3ff1ceaabe
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Sat Jan 13 11:58:35 2024 +0100

    Only fix simple search height if there are no other widgets in the dock area (#13005)
---
 src/frontends/qt/DockView.cpp  |    3 ++
 src/frontends/qt/GuiSearch.cpp |   50 +++++++++++++++++++++++++++++++++------
 src/frontends/qt/GuiSearch.h   |    3 ++
 src/frontends/qt/GuiView.h     |    4 +++
 4 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/src/frontends/qt/DockView.cpp b/src/frontends/qt/DockView.cpp
index ef204e2..81696c9 100644
--- a/src/frontends/qt/DockView.cpp
+++ b/src/frontends/qt/DockView.cpp
@@ -31,6 +31,9 @@ DockView::DockView(GuiView & parent, QString const & name,
 	hide();
 	connect(&parent, SIGNAL(bufferViewChanged()),
 	        this, SLOT(onBufferViewChanged()));
+	connect(this, SIGNAL(visibilityChanged(bool)),
+		&parent, SLOT(onDockWidgetVisibilityChanged()));
+
 
 	// Make dock widgets sub windows to prevent focusNextPrevChild
 	// (Tab key) switching to the parent rather than to the next
diff --git a/src/frontends/qt/GuiSearch.cpp b/src/frontends/qt/GuiSearch.cpp
index 3ca4f49..c702287 100644
--- a/src/frontends/qt/GuiSearch.cpp
+++ b/src/frontends/qt/GuiSearch.cpp
@@ -67,9 +67,6 @@ GuiSearchWidget::GuiSearchWidget(QWidget * parent, GuiView & view)
 {
 	setupUi(this);
 
-	// fix height to minimum
-	setFixedHeight(sizeHint().height());
-
 	// align items in grid on top
 	gridLayout->setAlignment(Qt::AlignTop);
 
@@ -126,6 +123,9 @@ GuiSearchWidget::GuiSearchWidget(QWidget * parent, GuiView & view)
 	replacePB->setEnabled(false);
 	replacePrevPB->setEnabled(false);
 	replaceallPB->setEnabled(false);
+
+	connect(&view_, SIGNAL(dockWidgetVisibilityChanged()),
+		this, SLOT(onDockWidgetVisibilityChanged()));
 }
 
 
@@ -568,6 +568,25 @@ void GuiSearchWidget::restoreSession(QString const & session_key)
 }
 
 
+bool GuiSearchWidget::hasCoWidgets(QDockWidget * dw)
+{
+	int res = 0;
+	QList<QDockWidget *> dockWidgets = view_.findChildren<QDockWidget *>();
+	for (int i = 0; i < dockWidgets.size(); ++i) {
+		if (dockWidgets.at(i)->isVisible()
+		    && view_.dockWidgetArea(dockWidgets.at(i)) == view_.dockWidgetArea(dw))
+			++res;
+	}
+	return res > 1;
+}
+
+
+void GuiSearchWidget::onDockWidgetVisibilityChanged()
+{
+	Q_EMIT needSizeUpdate();
+}
+
+
 GuiSearch::GuiSearch(GuiView & parent, Qt::DockWidgetArea area, Qt::WindowFlags flags)
 	: DockView(parent, "findreplace", qt_("Search and Replace"), area, flags),
 	  widget_(new GuiSearchWidget(this, parent))
@@ -661,13 +680,28 @@ void GuiSearch::updateTitle()
 
 void GuiSearch::updateSize()
 {
-	widget_->setFixedHeight(widget_->sizeHint().height());
-	if (widget_->isMinimized())
-		setFixedHeight(widget_->sizeHint().height());
-	else {
-		// undo setFixedHeight
+	// This can be triggered before the search widget is visible
+	// Nothing to do in that case
+	if (!widget_->isVisible())
+		return;
+
+	// if we have more than this widget in the current dock
+	// we do not fix the size as other widgets might want to
+	// remain resizable
+	if (widget_->hasCoWidgets(this)) {
+		widget_->setMaximumHeight(QWIDGETSIZE_MAX);
+		widget_->setMinimumHeight(0);
 		setMaximumHeight(QWIDGETSIZE_MAX);
 		setMinimumHeight(0);
+	} else {
+		widget_->setFixedHeight(widget_->sizeHint().height());
+		if (widget_->isMinimized())
+			setFixedHeight(widget_->sizeHint().height());
+		else {
+			// undo setFixedHeight
+			setMaximumHeight(QWIDGETSIZE_MAX);
+			setMinimumHeight(0);
+		}
 	}
 	update();
 }
diff --git a/src/frontends/qt/GuiSearch.h b/src/frontends/qt/GuiSearch.h
index 89234fe..bb3b523 100644
--- a/src/frontends/qt/GuiSearch.h
+++ b/src/frontends/qt/GuiSearch.h
@@ -43,6 +43,8 @@ public:
 	bool initialiseParams(std::string const &);
 	///
 	bool isMinimized() { return minimized_; }
+	///
+	bool hasCoWidgets(QDockWidget * dw);
 
 private Q_SLOTS:
 	void findChanged();
@@ -59,6 +61,7 @@ private Q_SLOTS:
 	void immediateActTriggered();
 	void immediateClicked();
 	void wrapActTriggered();
+	void onDockWidgetVisibilityChanged();
 Q_SIGNALS:
 	void needTitleBarUpdate() const;
 	void needSizeUpdate() const;
diff --git a/src/frontends/qt/GuiView.h b/src/frontends/qt/GuiView.h
index d55472d..ac6d293 100644
--- a/src/frontends/qt/GuiView.h
+++ b/src/frontends/qt/GuiView.h
@@ -232,6 +232,8 @@ Q_SIGNALS:
 	void scriptKilled();
 	/// emitted when track changes status toggled
 	void changeTrackingToggled(bool);
+	///
+	void dockWidgetVisibilityChanged();
 
 public Q_SLOTS:
 	///
@@ -245,6 +247,8 @@ public Q_SLOTS:
 	void updateWindowTitle(GuiWorkArea * wa);
 	///
 	void disableShellEscape();
+	///
+	void onDockWidgetVisibilityChanged() { Q_EMIT dockWidgetVisibilityChanged(); }
 
 private Q_SLOTS:
 	///