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->setEnabled(false);
  47     myLeftButton->setVisible(false);
  48     connect(myLeftButton,SIGNAL(clicked()), this, SLOT(onLeftScroll()));
  49     aMainLayout->addWidget(myLeftButton);
  50
  51     myCommandsArea = new CommandsArea(this);
  52     aMainLayout->addWidget(myCommandsArea);
  53
  54     myChildWidget = new QWidget(myCommandsArea);
  55     myCommandsArea->setWidget(myChildWidget);
  56     myCommandsArea->setAlignment(Qt::AlignLeft | Qt::AlignTop);
  57     myCommandsArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  58     myCommandsArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  59
  60     myLayout = new QHBoxLayout(myChildWidget);
  61     myLayout->setSpacing(0);
  62     myLayout->setMargin(0);
  63     myLayout->setContentsMargins(0,0,0,0);
  64
  65     myRightButton = new QPushButton(">", this);
  66     myRightButton->setMaximumWidth(14);
  67     myRightButton->setVisible(false);
  68     connect(myRightButton,SIGNAL(clicked()), this, SLOT(onRightScroll()));
  69     aMainLayout->addWidget(myRightButton);
  70
  71 }
  72
  73 int XGUI_Workbench::addGroup()
  74 {
  75     if (!myLayout->isEmpty()) {
  76         int aNb = myLayout->count();
  77         QLayoutItem* aItem = myLayout->itemAt(aNb - 1);
  78         myLayout->removeItem(aItem);
  79     }
  80     XGUI_MenuGroupPanel* aGroup = new XGUI_MenuGroupPanel(myChildWidget);
  81     myLayout->addWidget(aGroup);
  82     addSeparator();
  83     myLayout->addStretch();
  84     myGroups.append(aGroup);
  85     return myGroups.size() - 1;
  86 }
  87
  88 void XGUI_Workbench::addSeparator()
  89 {
  90     QFrame* aLine = new QFrame(myChildWidget);
  91     aLine->setFrameShape(QFrame::VLine);
  92     aLine->setFrameShadow(QFrame::Sunken);
  93     myLayout->addWidget(aLine);
  94 }
  95
  96 void XGUI_Workbench::addCommand(int theGroupId, XGUI_Command* theCommand)
  97 {
  98     XGUI_MenuGroupPanel* aGroup = myGroups.at(theGroupId);
  99     aGroup->addCommand(theCommand);
 100 }
 101
 102
 103 void XGUI_Workbench::resizeEvent(QResizeEvent* theEvent)
 104 {
 105     QWidget::resizeEvent(theEvent);
 106     QSize aSize = theEvent->size();
 107     myLeftButton->setMinimumHeight(aSize.height() - 2);
 108     myRightButton->setMinimumHeight(aSize.height() - 2);
 109
 110     QSize aS = myChildWidget->sizeHint();
 111         int aW = myChildWidget->width();
 112         if (aW < aS.width())
 113                 myChildWidget->resize(aS.width(), myChildWidget->height());
 114
 115     myLeftButton->setVisible(isExceedsLeft());
 116     myRightButton->setVisible(isExceedsRight());
 117 }
 118
 119
 120 void XGUI_Workbench::onLeftScroll()
 121 {
 122     if (!isExceedsLeft())
 123                 return;
 124     myChildWidget->move( myChildWidget->pos().x() + SCROLL_STEP, 0 );
 125     myLeftButton->setVisible(isExceedsLeft());
 126     myRightButton->setVisible(isExceedsRight());
 127 }
 128
 129
 130 void XGUI_Workbench::onRightScroll()
 131 {
 132     if (!isExceedsRight())
 133                 return;
 134     myChildWidget->move( myChildWidget->pos().x() - SCROLL_STEP, 0 );
 135     myLeftButton->setVisible(isExceedsLeft());
 136     myRightButton->setVisible(isExceedsRight());
 137 }
 138
 139
 140 bool XGUI_Workbench::isExceedsLeft()
 141 {
 142     QPoint aPos = myChildWidget->pos();
 143     return (aPos.x() < 0);
 144 }
 145
 146 bool XGUI_Workbench::isExceedsRight()
 147 {
 148     QPoint aPos = myChildWidget->pos();
 149     int aVPWidth = myCommandsArea->viewport()->rect().width();
 150     int aWgtWidth = myChildWidget->childrenRect().width();
 151     return ((aVPWidth - aPos.x()) < aWgtWidth);
 152 }