src/XGUI/XGUI_Workbench.cpp

   1 #include "XGUI_Workbench.h"
   2 #include "XGUI_MenuGroupPanel.h"
   3
   4 #include <QLayout>
   5 #include <QResizeEvent>
   6 #include <QPushButton>
   7
   8
   9 #define SCROLL_STEP 20
  10
  11 //**************************************************
  12 class CommandsArea : public QScrollArea
  13 {
  14 public:
  15     CommandsArea(QWidget* theParent) : QScrollArea(theParent) {}
  16
  17 protected:
  18     virtual void resizeEvent(QResizeEvent * theEvent);
  19 };
  20
  21 void CommandsArea::resizeEvent(QResizeEvent* theEvent)
  22 {
  23     int x = widget()->x();
  24     QScrollArea::resizeEvent(theEvent);
  25     QRect aRect = widget()->childrenRect();
  26     QSize aNewSize = theEvent->size();
  27     if (aRect.width() > aNewSize.width())
  28         aNewSize.setWidth(aRect.width() * 2);
  29     widget()->resize(aNewSize);
  30     widget()->move(x, 0);
  31 }
  32
  33
  34 //**************************************************
  35 XGUI_Workbench::XGUI_Workbench(QWidget *theParent) :
  36     QWidget(theParent)
  37 {
  38     setMinimumHeight(30);
  39     QHBoxLayout* aMainLayout = new QHBoxLayout(this);
  40     aMainLayout->setSpacing(0);
  41     aMainLayout->setMargin(0);
  42     aMainLayout->setContentsMargins(0,0,0,0);
  43
  44     myLeftButton = new QPushButton("<", this);
  45     myLeftButton->setMaximumWidth(14);
  46     myLeftButton->setVisible(false);
  47     connect(myLeftButton,SIGNAL(clicked()), this, SLOT(onLeftScroll()));
  48     aMainLayout->addWidget(myLeftButton);
  49
  50     myCommandsArea = new CommandsArea(this);
  51     aMainLayout->addWidget(myCommandsArea);
  52
  53     myChildWidget = new QWidget(myCommandsArea);
  54     myCommandsArea->setWidget(myChildWidget);
  55     myCommandsArea->setAlignment(Qt::AlignLeft | Qt::AlignTop);
  56     myCommandsArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  57     myCommandsArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  58
  59     myLayout = new QHBoxLayout(myChildWidget);
  60     myLayout->setSpacing(0);
  61     myLayout->setMargin(0);
  62     myLayout->setContentsMargins(0,0,0,0);
  63
  64     myRightButton = new QPushButton(">", this);
  65     myRightButton->setMaximumWidth(14);
  66     myRightButton->setVisible(false);
  67     connect(myRightButton,SIGNAL(clicked()), this, SLOT(onRightScroll()));
  68     aMainLayout->addWidget(myRightButton);
  69
  70 }
  71
  72 IMenuGroup* XGUI_Workbench::addGroup()
  73 {
  74     if (!myLayout->isEmpty()) {
  75         int aNb = myLayout->count();
  76         QLayoutItem* aItem = myLayout->itemAt(aNb - 1);
  77         myLayout->removeItem(aItem);
  78     }
  79     XGUI_MenuGroupPanel* aGroup = new XGUI_MenuGroupPanel(myChildWidget);
  80     myLayout->addWidget(aGroup);
  81     addSeparator();
  82     myLayout->addStretch();
  83     myGroups.append(aGroup);
  84     return aGroup;
  85 }
  86
  87 void XGUI_Workbench::addSeparator()
  88 {
  89     QFrame* aLine = new QFrame(myChildWidget);
  90     aLine->setFrameShape(QFrame::VLine);
  91     aLine->setFrameShadow(QFrame::Sunken);
  92     myLayout->addWidget(aLine);
  93 }
  94
  95 void XGUI_Workbench::resizeEvent(QResizeEvent* theEvent)
  96 {
  97     QWidget::resizeEvent(theEvent);
  98     QSize aSize = theEvent->size();
  99     myLeftButton->setMinimumHeight(aSize.height() - 2);
 100     myRightButton->setMinimumHeight(aSize.height() - 2);
 101
 102     QSize aS = myChildWidget->sizeHint();
 103         int aW = myChildWidget->width();
 104         if (aW < aS.width())
 105                 myChildWidget->resize(aS.width(), myChildWidget->height());
 106
 107     myLeftButton->setVisible(isExceedsLeft());
 108     myRightButton->setVisible(isExceedsRight());
 109 }
 110
 111
 112 void XGUI_Workbench::onLeftScroll()
 113 {
 114     if (!isExceedsLeft())
 115                 return;
 116     myChildWidget->move( myChildWidget->pos().x() + SCROLL_STEP, 0 );
 117     myLeftButton->setVisible(isExceedsLeft());
 118     myRightButton->setVisible(isExceedsRight());
 119 }
 120
 121
 122 void XGUI_Workbench::onRightScroll()
 123 {
 124     if (!isExceedsRight())
 125                 return;
 126     myChildWidget->move( myChildWidget->pos().x() - SCROLL_STEP, 0 );
 127     myLeftButton->setVisible(isExceedsLeft());
 128     myRightButton->setVisible(isExceedsRight());
 129 }
 130
 131
 132 bool XGUI_Workbench::isExceedsLeft()
 133 {
 134     QPoint aPos = myChildWidget->pos();
 135     return (aPos.x() < 0);
 136 }
 137
 138 bool XGUI_Workbench::isExceedsRight()
 139 {
 140     QPoint aPos = myChildWidget->pos();
 141     int aVPWidth = myCommandsArea->viewport()->rect().width();
 142     int aWgtWidth = myChildWidget->childrenRect().width();
 143     return ((aVPWidth - aPos.x()) < aWgtWidth);
 144 }