126 lines
3.4 KiB
C++
Executable File
126 lines
3.4 KiB
C++
Executable File
/**
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* @RDE_HEADER@
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* ComboBox, optimized for tablets (bigger dropdown/popup and more comfortable completer)
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* $Id$
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* $HeadURL$
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* $Author$
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*
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* Created by Mike Wille, SLSE, 2016-03-09
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*/
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#include "lts_combo_box.h"
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#include "lts_selection_popup.h"
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#include "lts_message_dialog.h"
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#include <QGuiApplication>
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#include <QShowEvent>
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//#define NEVER
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#ifdef NEVER
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# include <QDebug>
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#endif // NEVER
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namespace LtsWidgets
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{
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bool LtsComboBox::s_useSelectionDialog = false;
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LtsComboBox::LtsComboBox(QWidget *parent)
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: QComboBox(parent)
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, m_currentIndex(-1)
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{
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connect(this, &LtsComboBox::signalExternallyChanged,
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this, &LtsComboBox::signalRefill); // sig on sig (to fetch cbx as sender)
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}
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void LtsComboBox::setUseSelectionDialog(bool bUseSelectionDialog)
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{
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s_useSelectionDialog = bUseSelectionDialog;
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}
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void LtsComboBox::showEvent(QShowEvent *e)
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{
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QComboBox::showEvent(e);
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m_currentIndex = currentIndex();
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}
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void LtsComboBox::enterEvent(QEvent *e)
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{
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BaseClass::enterEvent(e);
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emit signalEnterEvent();
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}
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void LtsComboBox::leaveEvent(QEvent *e)
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{
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BaseClass::leaveEvent(e);
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emit signalLeaveEvent();
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}
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void LtsComboBox::showPopup()
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{
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bool bUseSelectionDialog = s_useSelectionDialog;
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if (QGuiApplication::queryKeyboardModifiers() == Qt::ControlModifier)
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bUseSelectionDialog = !bUseSelectionDialog;
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if (!bUseSelectionDialog)
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{
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QComboBox::showPopup(); // show original popup when CTRL is pressed
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return;
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}
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if (!model()->rowCount()) // nothing to show? tell the user.
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{
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LtsWidgets::LtsMessageDialog::showMessage(this, tr("There are no items available!"));
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return;
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}
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// create the touch-friendly, screen-centered custom popup and show it
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LtsSelectionPopup* popup = new LtsSelectionPopup(model(), currentIndex(), this);
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popup->setAttribute(Qt::WA_DeleteOnClose); // dialog must delete itself, as there is no Dialog Helper
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#ifdef NEVER
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// debugging :
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// // highlighted -> UserInteraction
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// connect(popup, static_cast<void (LtsSelectionPopup::*)(int)>(&LtsSelectionPopup::highlighted), this, [](int idx){
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// qCritical() << " LtsComboBox: called: highlighted(int), idx=" << idx;
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// });
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// currentIndexChanged -> programmatically & UserInteraction
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connect(popup, static_cast<void (LtsSelectionPopup::*)(int)>(&LtsSelectionPopup::currentIndexChanged), this, [](int idx){
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qCritical() << " LtsComboBox: called: currentIndexChanged(int), idx=" << idx;
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});
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// activated -> UserInteraction
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connect(popup, static_cast<void (LtsSelectionPopup::*)(int)>(&LtsSelectionPopup::activated), this, [](int idx){
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qCritical() << " LtsComboBox: called: activated(int), idx=" << idx;
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});
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// : debugging
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#endif // NEVER
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// Although we derive from QComboBox, there seems to be no signal emitted implicitly.
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// Therefore we have to listen to our popup:
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connect(popup, &LtsSelectionPopup::currentIndexChanged,
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this, &LtsComboBox::userChangedIndex); // listen on changes
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connect(popup, &LtsSelectionPopup::activated,
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this, static_cast<void (LtsComboBox::*)(int)>(&LtsComboBox::activated)); // SIGNAL on SIGNAL !
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popup->show();
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}
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void LtsComboBox::userChangedIndex(int index)
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{
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m_currentIndex = index;
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setCurrentIndex(index);
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}
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bool LtsComboBox::hasValueChanged() const
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{
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if (m_currentIndex == -1)
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return false;
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return !(currentIndex() == m_currentIndex);
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}
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} // namespace LtsWidgets
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