How to show ToolTip for QLineEdit with out mousehovering ..!
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I am trying to show the tooltip for a LineEdit without the mousehovering and by reading some examples and answers in Internet i have tried an example to make it work. But the example is compiling and executing fine but i am unable to achieve my target.
I know i did some thing wrong, i request your help to do so. Please correct bugs in my code.
MyLineEdit.h
#ifndef LINEEDITTOOLTIP_H #define LINEEDITTOOLTIP_H #include <QWidget> #include <QLineEdit> class MyLineEdit : public QLineEdit { Q_OBJECT public: MyLineEdit(QWidget *parent = 0); ~MyLineEdit(); signals: void focussed(bool hasFocus); protected: virtual void focusInEvent(QFocusEvent *e); virtual void focusOutEvent(QFocusEvent *e); }; #endif // LINEEDITTOOLTIP_HMyLineEdit.cpp
#include "MyLineEdit.h" MyLineEdit::MyLineEdit(QWidget *parent) : QLineEdit(parent) {} MyLineEdit::~MyLineEdit() {} void MyLineEdit::focusInEvent(QFocusEvent *e) { QLineEdit::focusInEvent(e); emit(focussed(true)); } void MyLineEdit::focusOutEvent(QFocusEvent *e) { QLineEdit::focusOutEvent(e); emit(focussed(false)); }Widget.h
#include <QWidget> #include <QLineEdit> #include <QPushButton> #include <QDebug> #include <QToolTip> #include "MyLineEdit.h" class Widget : public QWidget { Q_OBJECT public: /*! * This is Constructor */ explicit Widget(QWidget *parent = 0); MyLineEdit *ledt; ~Widget(); private: QPushButton *button; QLineEdit *cmConfLineEdit; private slots: void showLineEditToolTip(bool); void buttonSlot(); }; #endifWidget.cpp
Widget::Widget(QWidget *parent) : QWidget(parent), { ledt = new MyLineEdit; button = new QPushButton(this); button->setText("Press"); button->setGeometry(100,50,40,40); cmConfLineEdit = new QLineEdit; cmConfLineEdit->setParent(ledt); cmConfLineEdit->setGeometry(100,120,60,30); connect(button,SIGNAL(clicked()),this,SLOT(buttonSlot())); connect(ledt,SIGNAL(focussed(bool)),this,SLOT(showLineEditToolTip(bool))); void Widget::buttonSlot() { cmConfLineEdit->setFocusPolicy(Qt::StrongFocus); } void Widget::showLineEditToolTip(bool value) { qDebug()<<"Bool Value is"<<value; if(value == true) { QToolTip::showText(QPoint(110,130),"Enter Conf Number",this); } }Thanks in Advance,
Mounika.P@mounipanditi said in How to show ToolTip for QLineEdit with out mousehovering ..!:
are you sure it is not working?
QToolTip::showText() expects the position to be in global coordinates on the screen. Maybe you are just overseeing the tooltip? -
@mounipanditi said in How to show ToolTip for QLineEdit with out mousehovering ..!:
are you sure it is not working?
QToolTip::showText() expects the position to be in global coordinates on the screen. Maybe you are just overseeing the tooltip?Thanks for the reply,
I am sure after clicking on the PushButton i am unable to see the qDebug which i have written in the showLineEditToolTip SLOT.
What i have written is it correct..?
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Thanks for the reply,
I am sure after clicking on the PushButton i am unable to see the qDebug which i have written in the showLineEditToolTip SLOT.
What i have written is it correct..?
@mounipanditi said in How to show ToolTip for QLineEdit with out mousehovering ..!:
What i have written is it correct..?
seems so yes.
Any other output on the console regarding an unsuccessful connection to the slot? -
@mounipanditi said in How to show ToolTip for QLineEdit with out mousehovering ..!:
What i have written is it correct..?
seems so yes.
Any other output on the console regarding an unsuccessful connection to the slot?Nope except the following statement on console i am unable to see anything
Qt: Session management error: None of the authentication protocols specified are supported
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Thanks for the reply,
I am sure after clicking on the PushButton i am unable to see the qDebug which i have written in the showLineEditToolTip SLOT.
What i have written is it correct..?
@mounipanditi
I don't think what you've written is correct.Let me see, you have a subclass of QLineEdit that has a custom
focussedsignal,
that seems ok.You create such a custom object:
ledt = new MyLineEdit; //and connect to it connect(ledt,SIGNAL(focussed(bool)),this,SLOT(showLineEditToolTip(bool)));also ok,
but your buttonSlot connects to this one:void Widget::buttonSlot() { cmConfLineEdit->setFocusPolicy(Qt::StrongFocus); }which is a normal
QLineEditso you of course won't get Signal fromledtin fact your ledt is doing nothing, but leaking memory x)
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Nope except the following statement on console i am unable to see anything
Qt: Session management error: None of the authentication protocols specified are supported
@mounipanditi
what @J.Hilk wrote is only partially correct, but it lead me to the actual issue.
The code so far is syntactically correct. Though there is also non-sense contained.- it doesn't make sense to set a focus policy in a slot connected to a button. What should actually happen in this slot? If you want to set the focus to the line edit you should use setFocus() instead
- I have no idea why you place a QLineEdit into your custom MyLineEdit widget. Thus the MyLineEdit widget never receives the focus, because the child (plain QLineEdit gets it first)
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@mounipanditi
what @J.Hilk wrote is only partially correct, but it lead me to the actual issue.
The code so far is syntactically correct. Though there is also non-sense contained.- it doesn't make sense to set a focus policy in a slot connected to a button. What should actually happen in this slot? If you want to set the focus to the line edit you should use setFocus() instead
- I have no idea why you place a QLineEdit into your custom MyLineEdit widget. Thus the MyLineEdit widget never receives the focus, because the child (plain QLineEdit gets it first)
@raven-worx
you're right, it seemes, that I missed thecmConfLineEdit->setParent(ledt);part. Only noticed it, when you wrote it down! -
@mounipanditi
what @J.Hilk wrote is only partially correct, but it lead me to the actual issue.
The code so far is syntactically correct. Though there is also non-sense contained.- it doesn't make sense to set a focus policy in a slot connected to a button. What should actually happen in this slot? If you want to set the focus to the line edit you should use setFocus() instead
- I have no idea why you place a QLineEdit into your custom MyLineEdit widget. Thus the MyLineEdit widget never receives the focus, because the child (plain QLineEdit gets it first)
@raven-worx said in How to show ToolTip for QLineEdit with out mousehovering ..!:
policy in a slot connected to a butto
I understand your point, can you please guide me how to achieve my target to show the ToolTip for a lineEdit with out mouse hovering either by a code snippet or a documented guide.
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@raven-worx said in How to show ToolTip for QLineEdit with out mousehovering ..!:
policy in a slot connected to a butto
I understand your point, can you please guide me how to achieve my target to show the ToolTip for a lineEdit with out mouse hovering either by a code snippet or a documented guide.
your example modified:
Widget::Widget(QWidget *parent) : QWidget(parent), { ledt = new MyLineEdit; ledt->setGeometry(100,120,60,30); button = new QPushButton(this); button->setText("Press"); button->setGeometry(100,50,40,40); connect(button,SIGNAL(clicked()),this,SLOT(buttonSlot())); connect(ledt,SIGNAL(focussed(bool)),this,SLOT(showLineEditToolTip(bool))); void Widget::buttonSlot() { ledt->setFocus(); } -
your example modified:
Widget::Widget(QWidget *parent) : QWidget(parent), { ledt = new MyLineEdit; ledt->setGeometry(100,120,60,30); button = new QPushButton(this); button->setText("Press"); button->setGeometry(100,50,40,40); connect(button,SIGNAL(clicked()),this,SLOT(buttonSlot())); connect(ledt,SIGNAL(focussed(bool)),this,SLOT(showLineEditToolTip(bool))); void Widget::buttonSlot() { ledt->setFocus(); }Thanks for the reply i was unable to see the Tooltip after modifying the code as you have posted.
Please go through the below screen shots
