From 2d70c2e2123c73ad8235ec1f06fd785f731dfdc7 Mon Sep 17 00:00:00 2001
From: Nikolai Kosjar <nikolai.kosjar@digia.com>
Date: Fri, 7 Mar 2014 13:55:06 -0300
Subject: [PATCH] CodeAssist: Limit width of tooltips

This is a workaround for black tooltips or even crahes when the nvidia
driver is used.

Task-number: QTCREATORBUG-11653
Change-Id: I4ddc09354a9956a55ac6b196a596f3eaeef13670
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
---
 .../codeassist/genericproposalwidget.cpp      | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/plugins/texteditor/codeassist/genericproposalwidget.cpp b/src/plugins/texteditor/codeassist/genericproposalwidget.cpp
index 839e26f31d9..5bc89f1dd7f 100644
--- a/src/plugins/texteditor/codeassist/genericproposalwidget.cpp
+++ b/src/plugins/texteditor/codeassist/genericproposalwidget.cpp
@@ -36,6 +36,7 @@
 #include <texteditor/completionsettings.h>
 #include <texteditor/texteditorconstants.h>
 
+#include <utils/elidinglabel.h>
 #include <utils/faketooltip.h>
 #include <utils/hostosinfo.h>
 
@@ -150,13 +151,16 @@ class GenericProposalInfoFrame : public Utils::FakeToolTip
 {
 public:
     GenericProposalInfoFrame(QWidget *parent = 0)
-        : Utils::FakeToolTip(parent), m_label(new QLabel(this))
+        : Utils::FakeToolTip(parent), m_label(new Utils::ElidingLabel(this))
     {
         QVBoxLayout *layout = new QVBoxLayout(this);
         layout->setMargin(0);
         layout->setSpacing(0);
         layout->addWidget(m_label);
 
+        // Limit horizontal width
+        m_label->setSizePolicy(QSizePolicy::Fixed, m_label->sizePolicy().verticalPolicy());
+
         m_label->setForegroundRole(QPalette::ToolTipText);
         m_label->setBackgroundRole(QPalette::ToolTipBase);
     }
@@ -166,6 +170,20 @@ public:
         m_label->setText(text);
     }
 
+    // Workaround QTCREATORBUG-11653
+    void calculateMaximumWidth()
+    {
+        const QDesktopWidget *desktopWidget = QApplication::desktop();
+        const int desktopWidth = desktopWidget->isVirtualDesktop()
+                ? desktopWidget->width()
+                : desktopWidget->availableGeometry(desktopWidget->primaryScreen()).width();
+        const QMargins widgetMargins = contentsMargins();
+        const QMargins layoutMargins = layout()->contentsMargins();
+        const int margins = widgetMargins.left() + widgetMargins.right()
+                + layoutMargins.left() + layoutMargins.right();
+        m_label->setMaximumWidth(desktopWidth - this->pos().x() - margins);
+    }
+
 private:
     QLabel *m_label;
 };
@@ -296,6 +314,7 @@ void GenericProposalWidgetPrivate::maybeShowInfoTip()
 
     m_infoFrame->move(m_completionListView->infoFramePos());
     m_infoFrame->setText(infoTip);
+    m_infoFrame->calculateMaximumWidth();
     m_infoFrame->adjustSize();
     m_infoFrame->show();
     m_infoFrame->raise();