当前位置: 首页>>代码示例>>C++>>正文

C++ BListItem::Height方法代码示例

本文整理汇总了C++中BListItem::Height方法的典型用法代码示例。如果您正苦于以下问题：C++ BListItem::Height方法的具体用法？C++ BListItem::Height怎么用？C++ BListItem::Height使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BListItem的用法示例。


在下文中一共展示了BListItem::Height方法的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: ComputeDimens

void ArpOutlineListView::ComputeDimens(ArpDimens& cur_dimens)
{
	float min_w=0, min_h=0;
	float pref_w=0, pref_h=0;
	
	int32 num = CountItems();
	int32 max_num = 4;
	for( int32 i=0; i<num; i++ ) {
		BListItem* item = ItemAt(i);
		if( item ) {
			item->Update(this,BasicFont());
			float w = item->Width();
			float h = item->Height();
			min_h = max(min_h,h);
			pref_w = max(pref_w,w);
			if( max_num > 0 ) pref_h += h;
			max_num--;
		}
	}
	pref_h+=2;
	float fw = BasicFont()->StringWidth("WWWW");
	font_height fhs;
	BasicFont()->GetHeight(&fhs);
	float fh = fhs.ascent+fhs.descent+fhs.leading;
	min_w = max(min_w,fw);
	min_h = max(min_h,fh);
	pref_w = max(pref_w,min_w);
	pref_h = max(pref_h,min_h);
	
	cur_dimens.X().SetTo(0, min_w, pref_w, ArpAnySize, 0);
	cur_dimens.Y().SetTo(0, min_h, pref_h, ArpAnySize, 0);
}
开发者ID:HaikuArchives，项目名称:Sequitur，代码行数:32，代码来源:ViewStubs.cpp

示例2: GetMaxPages

int32 MyListView::GetMaxPages (BRect printArea)
{
	// assume pages always fit horizontally
	int32 maxItems = CountItems();
	BListItem *item = FirstItem();
	if (item == NULL) return 0;
	return (int32)ceil(maxItems*item->Height()/printArea.Height());
}
开发者ID:，项目名称:，代码行数:8，代码来源:

示例3: itemFrame

void
BListView::Draw(BRect updateRect)
{
	int32 count = CountItems();
	if (count == 0)
		return;

	BRect itemFrame(0, 0, Bounds().right, -1);
	for (int i = 0; i < count; i++) {
		BListItem* item = ItemAt(i);
		itemFrame.bottom = itemFrame.top + ceilf(item->Height()) - 1;

		if (itemFrame.Intersects(updateRect))
			DrawItem(item, itemFrame);

		itemFrame.top = itemFrame.bottom + 1;
	}
}
开发者ID:RAZVOR，项目名称:haiku，代码行数:18，代码来源:ListView.cpp

示例4: CountItems

void
BListView::_RecalcItemTops(int32 start, int32 end)
{
	int32 count = CountItems();
	if ((start < 0) || (start >= count))
		return;

	if (end >= 0)
		count = end + 1;

	float top = (start == 0) ? 0.0 : ItemAt(start - 1)->Bottom() + 1.0;

	for (int32 i = start; i < count; i++) {
		BListItem *item = ItemAt(i);
		item->SetTop(top);
		top += ceilf(item->Height());
	}
}
开发者ID:RAZVOR，项目名称:haiku，代码行数:18，代码来源:ListView.cpp

示例5: msg

// InitiateDrag
bool
DragSortableListView::InitiateDrag( BPoint point, int32 index, bool )
{
	// supress drag&drop while an item is focused
	if (fFocusedIndex >= 0)
		return false;

	bool success = false;
	BListItem* item = ItemAt( CurrentSelection( 0 ) );
	if ( !item ) {
		// workarround a timing problem
		Select( index );
		item = ItemAt( index );
	}
	if ( item ) {
		// create drag message
		BMessage msg( fDragCommand );
		MakeDragMessage( &msg );
		// figure out drag rect
		float width = Bounds().Width();
		BRect dragRect(0.0, 0.0, width, -1.0);
		// figure out, how many items fit into our bitmap
		int32 numItems;
		bool fade = false;
		for (numItems = 0; BListItem* item = ItemAt( CurrentSelection( numItems ) ); numItems++) {
			dragRect.bottom += ceilf( item->Height() ) + 1.0;
			if ( dragRect.Height() > MAX_DRAG_HEIGHT ) {
				fade = true;
				dragRect.bottom = MAX_DRAG_HEIGHT;
				numItems++;
				break;
			}
		}
		BBitmap* dragBitmap = new BBitmap( dragRect, B_RGB32, true );
		if ( dragBitmap && dragBitmap->IsValid() ) {
			if ( BView *v = new BView( dragBitmap->Bounds(), "helper", B_FOLLOW_NONE, B_WILL_DRAW ) ) {
				dragBitmap->AddChild( v );
				dragBitmap->Lock();
				BRect itemBounds( dragRect) ;
				itemBounds.bottom = 0.0;
				// let all selected items, that fit into our drag_bitmap, draw
				for ( int32 i = 0; i < numItems; i++ ) {
					int32 index = CurrentSelection( i );
					BListItem* item = ItemAt( index );
					itemBounds.bottom = itemBounds.top + ceilf( item->Height() );
					if ( itemBounds.bottom > dragRect.bottom )
						itemBounds.bottom = dragRect.bottom;
					DrawListItem( v, index, itemBounds );
					itemBounds.top = itemBounds.bottom + 1.0;
				}
				// make a black frame arround the edge
				v->SetHighColor( 0, 0, 0, 255 );
				v->StrokeRect( v->Bounds() );
				v->Sync();

				uint8 *bits = (uint8 *)dragBitmap->Bits();
				int32 height = (int32)dragBitmap->Bounds().Height() + 1;
				int32 width = (int32)dragBitmap->Bounds().Width() + 1;
				int32 bpr = dragBitmap->BytesPerRow();

				if (fade) {
					for ( int32 y = 0; y < height - ALPHA / 2; y++, bits += bpr ) {
						uint8 *line = bits + 3;
						for (uint8 *end = line + 4 * width; line < end; line += 4)
							*line = ALPHA;
					}
					for ( int32 y = height - ALPHA / 2; y < height; y++, bits += bpr ) {
						uint8 *line = bits + 3;
						for (uint8 *end = line + 4 * width; line < end; line += 4)
							*line = (height - y) << 1;
					}
				} else {
					for ( int32 y = 0; y < height; y++, bits += bpr ) {
						uint8 *line = bits + 3;
						for (uint8 *end = line + 4 * width; line < end; line += 4)
							*line = ALPHA;
					}
				}
				dragBitmap->Unlock();
			}
		} else {
			delete dragBitmap;
			dragBitmap = NULL;
		}
		if (dragBitmap)
			DragMessage( &msg, dragBitmap, B_OP_ALPHA, BPoint( 0.0, 0.0 ) );
		else
			DragMessage( &msg, dragRect.OffsetToCopy( point ), this );

		_SetDragMessage(&msg);
		success = true;
	}
	return success;
}
开发者ID:，项目名称:，代码行数:95，代码来源:

示例6: message

bool
AudioListView::InitiateDrag(BPoint point, int32 dragIndex, bool)
{
	BListItem* item = ItemAt(CurrentSelection(0));
	if (item == NULL) {
		// workaround for a timing problem (see Locale prefs)
		Select(dragIndex);
		item = ItemAt(dragIndex);
	}
	if (item == NULL)
		return false;

	// create drag message
	BMessage message(kDraggedItem);
	for (int32 i = 0;; i++) {
		int32 index = CurrentSelection(i);
		if (index < 0)
			break;
		message.AddPointer("trackitem", ItemAt(CurrentSelection(i)));
	}

	// figure out drag rect
	BRect dragRect(0.0, 0.0, Bounds().Width(), -1.0);

	// figure out, how many items fit into our bitmap
	bool fade = false;

	for (int32 i = 0; message.FindPointer("trackitem", i,
		reinterpret_cast<void**>(&item)) == B_OK; i++) {

		dragRect.bottom += ceilf(item->Height()) + 1.0;

		if (dragRect.Height() > MAX_DRAG_HEIGHT) {
			dragRect.bottom = MAX_DRAG_HEIGHT;
			fade = true;
			break;
		}
	}

	BBitmap* dragBitmap = new BBitmap(dragRect, B_RGB32, true);
	if (dragBitmap->IsValid()) {
		BView* view = new BView(dragBitmap->Bounds(), "helper", B_FOLLOW_NONE,
			B_WILL_DRAW);
		dragBitmap->AddChild(view);
		dragBitmap->Lock();
		BRect itemBounds(dragRect) ;
		itemBounds.bottom = 0.0;
		// let all selected items, that fit into our drag_bitmap, draw
		for (int32 i = 0; message.FindPointer("trackitem", i,
				reinterpret_cast<void**>(&item)) == B_OK; i++) {
			AudioListItem* item;
			message.FindPointer("trackitem", i,
				reinterpret_cast<void**>(&item));
			itemBounds.bottom = itemBounds.top + ceilf(item->Height());
			if (itemBounds.bottom > dragRect.bottom)
				itemBounds.bottom = dragRect.bottom;
			item->DrawItem(view, itemBounds);
			itemBounds.top = itemBounds.bottom + 1.0;
		}
		// make a black frame around the edge
		view->SetHighColor(0, 0, 0, 255);
		view->StrokeRect(view->Bounds());
		view->Sync();

		uint8* bits = (uint8*)dragBitmap->Bits();
		int32 height = (int32)dragBitmap->Bounds().Height() + 1;
		int32 width = (int32)dragBitmap->Bounds().Width() + 1;
		int32 bpr = dragBitmap->BytesPerRow();

		if (fade) {
			for (int32 y = 0; y < height - ALPHA / 2; y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = ALPHA;
			}
			for (int32 y = height - ALPHA / 2; y < height;
				y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = (height - y) << 1;
			}
		} else {
			for (int32 y = 0; y < height; y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = ALPHA;
			}
		}
		dragBitmap->Unlock();
	} else {
		delete dragBitmap;
		dragBitmap = NULL;
	}

	if (dragBitmap != NULL)
		DragMessage(&message, dragBitmap, B_OP_ALPHA, BPoint(0.0, 0.0));
	else
		DragMessage(&message, dragRect.OffsetToCopy(point), this);

	return true;
//.........这里部分代码省略.........
开发者ID:HaikuArchives，项目名称:BurnItNow，代码行数:101，代码来源:AudioList.cpp

示例7: dragRect

bool
LanguageListView::InitiateDrag(BPoint point, int32 dragIndex,
	bool /*wasSelected*/)
{
	if (fDragMessage == NULL)
		return false;

	BListItem* item = ItemAt(CurrentSelection(0));
	if (item == NULL) {
		// workaround for a timing problem
		// TODO: this should support extending the selection
		item = ItemAt(dragIndex);
		Select(dragIndex);
	}
	if (item == NULL)
		return false;

	// create drag message
	BMessage message = *fDragMessage;
	message.AddPointer("listview", this);

	for (int32 i = 0;; i++) {
		int32 index = CurrentSelection(i);
		if (index < 0)
			break;

		message.AddInt32("index", index);
	}

	// figure out drag rect

	BRect dragRect(0.0, 0.0, Bounds().Width(), -1.0);
	int32 numItems = 0;
	bool fade = false;

	// figure out, how many items fit into our bitmap
	for (int32 i = 0, index; message.FindInt32("index", i, &index) == B_OK;
			i++) {
		BListItem* item = ItemAt(index);
		if (item == NULL)
			break;

		dragRect.bottom += ceilf(item->Height()) + 1.0;
		numItems++;

		if (dragRect.Height() > MAX_DRAG_HEIGHT) {
			dragRect.bottom = MAX_DRAG_HEIGHT;
			fade = true;
			break;
		}
	}

	BBitmap* dragBitmap = new BBitmap(dragRect, B_RGB32, true);
	if (dragBitmap->IsValid()) {
		BView* view = new BView(dragBitmap->Bounds(), "helper", B_FOLLOW_NONE,
			B_WILL_DRAW);
		dragBitmap->AddChild(view);
		dragBitmap->Lock();
		BRect itemBounds(dragRect) ;
		itemBounds.bottom = 0.0;
		// let all selected items, that fit into our drag_bitmap, draw
		for (int32 i = 0; i < numItems; i++) {
			int32 index = message.FindInt32("index", i);
			LanguageListItem* item
				= static_cast<LanguageListItem*>(ItemAt(index));
			itemBounds.bottom = itemBounds.top + ceilf(item->Height());
			if (itemBounds.bottom > dragRect.bottom)
				itemBounds.bottom = dragRect.bottom;
			item->DrawItem(view, itemBounds);
			itemBounds.top = itemBounds.bottom + 1.0;
		}
		// make a black frame arround the edge
		view->SetHighColor(0, 0, 0, 255);
		view->StrokeRect(view->Bounds());
		view->Sync();

		uint8* bits = (uint8*)dragBitmap->Bits();
		int32 height = (int32)dragBitmap->Bounds().Height() + 1;
		int32 width = (int32)dragBitmap->Bounds().Width() + 1;
		int32 bpr = dragBitmap->BytesPerRow();

		if (fade) {
			for (int32 y = 0; y < height - ALPHA / 2; y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = ALPHA;
			}
			for (int32 y = height - ALPHA / 2; y < height;
				y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = (height - y) << 1;
			}
		} else {
			for (int32 y = 0; y < height; y++, bits += bpr) {
				uint8* line = bits + 3;
				for (uint8* end = line + 4 * width; line < end; line += 4)
					*line = ALPHA;
			}
		}
//.........这里部分代码省略.........
开发者ID:veer77，项目名称:Haiku-services-branch，代码行数:101，代码来源:LanguageListView.cpp


注：本文中的BListItem::Height方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。