本文整理汇总了C++中TextRenderer::firstVisibleLine方法的典型用法代码示例。如果您正苦于以下问题：C++ TextRenderer::firstVisibleLine方法的具体用法？C++ TextRenderer::firstVisibleLine怎么用？C++ TextRenderer::firstVisibleLine使用的例子？那么恭喜您, 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TextRenderer的用法示例。
在下文中一共展示了TextRenderer::firstVisibleLine方法的1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: execute
/// execute the given selection command
/// @param controller the controller to execute the selection for
void SelectionCommand::execute( TextEditorController* controller )
{
// save the selection state
TextDocument* document = controller->textDocument();
TextRangeSet* currentSelection = dynamic_cast<TextRangeSet*>( controller->textSelection() );
TextRangeSet* sel = new TextRangeSet(*currentSelection); // start with the current selection
bool resetAnchors = !keepSelection_;
// handle the select operation
switch( unit_ ) {
// character movement
case MoveCaretByCharacter:
sel->moveCarets(amount_);
break;
// This results in clearing the selection if a selection is present or it results in a movement of the caret.
// When clearing a selection the caret is placed next to the selection (which side depends on the direction)
case MoveCaretsOrDeselect:
if( keepSelection_ ) {
sel->moveCarets(amount_);
} else {
sel->moveCaretsOrDeselect(amount_);
}
break;
case MoveCaretByWord:
sel->moveCaretsByCharGroup(amount_, document->config()->whitespaceWithoutNewline(), document->config()->charGroups() );
break;
case MoveCaretByLine:
TextSelection::moveCaretsByLine( controller, sel, amount_ );
break;
case MoveCaretToLineBoundary:
sel->moveCaretsToLineBoundary( amount_, document->config()->whitespaceWithoutNewline() );
break;
case MoveCaretToDocumentBegin:
sel->toSingleRange();
sel->range(0).setCaret(0);
break;
case MoveCaretToDocumentEnd:
sel->toSingleRange();
sel->range(0).setCaret( controller->textDocument()->length() );
break;
case MoveCaretByPage:
{
// make sure the first line of the window is scrolled
TextRenderer* renderer = controller->textRenderer();
TextEditorWidget* widget = controller->widget();
int firstVisibleLine = renderer->firstVisibleLine();
int linesPerPage = renderer->viewHeightInLines();
sel->beginChanges();
TextSelection::moveCaretsByPage( controller, sel, amount_ );
if( !keepSelection_ ) {
sel->resetAnchors(); // we must reset anchors here because de process-changes will merge carets
}
sel->endChanges();
firstVisibleLine += linesPerPage * amount_;
widget->scrollTopToLine( firstVisibleLine );
break;
}
case MoveCaretToExactOffset:
sel->toSingleRange();
sel->range(0).setCaret(amount_);
break;
case SelectAll:
sel->toSingleRange();
sel->setRange(0, document->buffer()->length() );
resetAnchors = false; // do not reset the anchors
break;
case SelectWord:
sel->expandToWords(document->config()->whitespaces(), document->config()->charGroups());
resetAnchors = false; // do not reset the anchors
break;
case SelectWordAt:
sel->selectWordAt( amount_, document->config()->whitespaces(), document->config()->charGroups() );
resetAnchors = false;
break;
case ToggleWordSelectionAt:
sel->toggleWordSelectionAt( amount_, document->config()->whitespaces(), document->config()->charGroups() );
resetAnchors = false;
break;
case SelectFullLine:
sel->expandToFullLines( amount_);
resetAnchors = false;
break;
//.........这里部分代码省略.........