111 lines
2.3 KiB
C++
111 lines
2.3 KiB
C++
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// puList.cxx - implementation of a scrolling list box.
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#include "puList.hxx"
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/**
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* Static function: handle slider movements.
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*/
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static void
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handle_slider (puObject * slider)
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{
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puListBox * box = (puListBox *)slider->getUserData();
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int index = int(box->getNumItems() * (1.0 - slider->getFloatValue()));
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if (index >= box->getNumItems())
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index = box->getNumItems() - 1;
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box->setTopItem(index);
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}
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/**
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* Static function: handle arrow clicks.
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*/
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static void
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handle_arrow (puObject * arrow)
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{
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puSlider * slider = (puSlider *)arrow->getUserData();
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puListBox * list_box = (puListBox *)slider->getUserData();
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int step;
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switch (((puArrowButton *)arrow)->getArrowType()) {
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case PUARROW_DOWN:
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step = 1;
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break;
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case PUARROW_UP:
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step = -1;
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break;
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default:
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step = 0;
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break;
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}
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int index = list_box->getTopItem();
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index += step;
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if (index < 0)
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index = 0;
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else if (index >= list_box->getNumItems())
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index = list_box->getNumItems() - 1;
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list_box->setTopItem(index);
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slider->setValue(1.0f - float(index)/list_box->getNumItems());
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}
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puList::puList (int x, int y, int w, int h)
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: puGroup(x, y)
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{
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init(w, h);
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}
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puList::puList (int x, int y, int w, int h, char ** contents)
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: puGroup(x, y)
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{
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init(w, h);
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newList(contents);
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}
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puList::~puList ()
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{
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}
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void
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puList::newList (char ** contents)
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{
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_list_box->newList(contents);
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_contents = contents;
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}
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char *
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puList::getStringValue ()
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{
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return _contents[_list_box->getIntegerValue()];
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}
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void
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puList::init (int w, int h)
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{
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_frame = new puFrame(0, 0, w, h);
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_list_box = new puListBox(0, 0, w-30, h);
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_list_box->setStyle(-PUSTYLE_SMALL_SHADED);
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_list_box->setUserData(this);
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_list_box->setValue(0);
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_slider = new puSlider(w-30, 30, h-60, true);
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_slider->setValue(1.0f);
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_slider->setUserData(_list_box);
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_slider->setCallback(handle_slider);
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_slider->setCBMode(PUSLIDER_ALWAYS);
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_down_arrow = new puArrowButton(w-30, 0, w, 30, PUARROW_DOWN) ;
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_down_arrow->setUserData(_slider);
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_down_arrow->setCallback(handle_arrow);
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_up_arrow = new puArrowButton(w-30, h-30, w, h, PUARROW_UP);
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_up_arrow->setUserData(_slider);
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_up_arrow->setCallback(handle_arrow);
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close();
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}
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// end of puList.cxx
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