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#include <QDebug>
#include <QScrollBar>
#include "UBGlobals.h"
#include "UBWidgetList.h"
UBWidgetList::UBWidgetList(QWidget* parent, eWidgetListOrientation orientation, const char* name):QScrollArea(parent)
, mpLayout(NULL)
, mpContainer(NULL)
, mMargin(5)
, mListElementsSpacing(10)
, mpEmptyLabel(NULL)
{
setObjectName(name);
mOrientation = orientation;
mpContainer = new QWidget(this);
mpEmptyLabel = new QLabel(this);
mpEmptyLabel->setObjectName("emptyString");
mpEmptyLabel->setWordWrap(true);
mpEmptyLabel->setAlignment(Qt::AlignCenter);
if(eWidgetListOrientation_Vertical == orientation){
setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
mpLayout = new QVBoxLayout(mpContainer);
}
else{
setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
mpLayout = new QHBoxLayout(mpContainer);
}
mpLayout->setContentsMargins(margin(), margin(), margin(), margin());
mpContainer->setLayout(mpLayout);
setWidget(mpContainer);
}
UBWidgetList::~UBWidgetList()
{
DELETEPTR(mpEmptyLabel);
DELETEPTR(mpLayout);
DELETEPTR(mpContainer);
}
void UBWidgetList::addWidget(QWidget *widget)
{
if(NULL != mpLayout && NULL != widget){
widget->setParent(mpContainer);
mpEmptyLabel->setVisible(false);
mWidgetInfo[widget] = widget->size();
updateView(size());
mpLayout->addWidget(widget);
// This call is used only to refresh the size of the widgets
updateSizes();
}
}
void UBWidgetList::removeWidget(QWidget *widget)
{
if(NULL != mpLayout && NULL != widget){
mpLayout->removeWidget(widget);
mWidgetInfo.remove(widget);
widget->setVisible(false);
updateView(size());
if(0 == mpLayout->count()){
mpEmptyLabel->setVisible(true);
}
}
}
int UBWidgetList::scaleWidgets(QSize pSize)
{
// to remove the first spacing that shouldn't be there.
int result = -mListElementsSpacing;
foreach(QWidget* eachWidget, mWidgetInfo.keys()){
qreal scaleFactor = 0;
int newWidgetWidth = pSize.width();
int newWidgetHeight = pSize.height();
if(eWidgetListOrientation_Vertical == mOrientation){
scaleFactor = (float)mWidgetInfo[eachWidget].width() / (float)pSize.width();
newWidgetHeight = mWidgetInfo[eachWidget].height()/scaleFactor;
result += newWidgetHeight;
eachWidget->setMinimumHeight(newWidgetHeight- 1);
eachWidget->setMaximumHeight(newWidgetHeight);
}
else{
scaleFactor = (float)mWidgetInfo[eachWidget].height() / (float)pSize.height();
newWidgetWidth = mWidgetInfo[eachWidget].width()/scaleFactor;
result += newWidgetWidth;
eachWidget->setMinimumWidth(newWidgetWidth - 1);
eachWidget->setMaximumWidth(newWidgetWidth);
}
//Adding a vertical/horizontal space between each element of the list
result += mListElementsSpacing;
}
return result;
}
void UBWidgetList::scaleContainer(QSize pSize, int updateValue)
{
if(eWidgetListOrientation_Vertical == mOrientation)
mpContainer->resize(pSize.width(), updateValue);
else
mpContainer->resize(updateValue, pSize.height());
}
void UBWidgetList::updateView(QSize pSize)
{
// Widgets on list are resized automatically to fit the mpcontainer.
// so if you want to keep the aspect ratio you have to calculate
// the sum of the new widget height and give it to the mpContainer.
// The container resize will trig the widgets resize and the good
// height permits to respect the aspect ratio.
int updatedValue = scaleWidgets(pSize);
scaleContainer(pSize,updatedValue);
}
void UBWidgetList::resizeEvent(QResizeEvent *ev)
{
Q_UNUSED(ev);
mpEmptyLabel->setGeometry((width() - mpEmptyLabel->width()) / 2,
(height() - mpEmptyLabel->height()) /2,
mpEmptyLabel->width(),
mpEmptyLabel->height());
updateView(size());
updateSizes();
}
void UBWidgetList::updateSizes()
{
// Resize all the widgets
foreach(QWidget* eachWidget, mWidgetInfo.keys()){
if(NULL != eachWidget){
QSize originalSize = mWidgetInfo[eachWidget];
int currentWidth = mpContainer->width();
int currentHeight = mpContainer->height();
if(eWidgetListOrientation_Vertical == mOrientation){
if(verticalScrollBar()->isVisible()){
currentWidth -= verticalScrollBar()->width();
eachWidget->setStyleSheet(QString("margin-right:%0;").arg(verticalScrollBar()->width()));
}
float scaleFactor = (float)currentWidth/(float)originalSize.width();
currentHeight = originalSize.height()*scaleFactor;
}else{
if(horizontalScrollBar()->isVisible()){
currentHeight -= horizontalScrollBar()->height();
eachWidget->setStyleSheet(QString("padding-bottom:%0;").arg(horizontalScrollBar()->height()));
}
float scaleFactor = (float)currentHeight/(float)originalSize.height();
currentWidth = originalSize.width()*scaleFactor;
}
eachWidget->resize(currentWidth, currentHeight);
}
}
}
void UBWidgetList::setMargin(int margin)
{
mMargin = margin;
}
int UBWidgetList::margin()
{
return mMargin;
}
void UBWidgetList::setEmptyText(const QString &text)
{
if(NULL != mpEmptyLabel){
mpEmptyLabel->setText(text);
}
}
bool UBWidgetList::empty()
{
return mWidgetInfo.empty();
}
// TODO : - add onHover 'delete' button