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Overhaul draggable selection rectangle logic

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The cursor always forms one corner of the selection area.
The area can also be selected with the keyboard using Shift and the
arrow keys.
This commit is contained in:
G.K.MacGregor
2021-04-27 22:07:54 +01:00
parent f258c6e095
commit 4387e9ffbd
3 changed files with 98 additions and 54 deletions
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25
document.h
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@@ -64,18 +64,19 @@ public:
QUndoStack *undoStack() const { return m_undoStack; }
int cursorRow() const { return m_cursorRow; }
int cursorColumn() const { return m_cursorColumn; }
void cursorUp();
void cursorDown();
void cursorLeft();
void cursorRight();
void moveCursor(int, int);
int selectionTopRow() const { return m_selectionTopRow; }
int selectionBottomRow() const { return m_selectionBottomRow; }
int selectionLeftColumn() const { return m_selectionLeftColumn; }
int selectionRightColumn() const { return m_selectionRightColumn; }
int selectionWidth() const { return m_selectionRightColumn - m_selectionLeftColumn + 1; }
int selectionHeight() const { return m_selectionBottomRow - m_selectionTopRow + 1; }
void cursorUp(bool shiftKey=false);
void cursorDown(bool shiftKey=false);
void cursorLeft(bool shiftKey=false);
void cursorRight(bool shiftKey=false);
void moveCursor(int, int, bool selectionInProgress=false);
int selectionTopRow() const { return qMin(m_selectionCornerRow, m_cursorRow); }
int selectionBottomRow() const { return qMax(m_selectionCornerRow, m_cursorRow); }
int selectionLeftColumn() const { return qMin(m_selectionCornerColumn, m_cursorColumn); }
int selectionRightColumn() const { return qMax(m_selectionCornerColumn, m_cursorColumn); }
int selectionWidth() const { return selectionRightColumn() - selectionLeftColumn() + 1; }
int selectionHeight() const { return selectionBottomRow() - selectionTopRow() + 1; }
bool selectionActive() const { return m_selectionSubPage == currentSubPage(); }
void setSelectionCorner(int, int);
void setSelection(int, int, int, int);
void cancelSelection();
int levelRequired() const;
@@ -99,7 +100,7 @@ private:
std::vector<LevelOnePage *> m_subPages;
std::vector<LevelOnePage *> m_recycleSubPages;
QUndoStack *m_undoStack;
int m_cursorRow, m_cursorColumn, m_selectionTopRow, m_selectionBottomRow, m_selectionLeftColumn, m_selectionRightColumn;
int m_cursorRow, m_cursorColumn, m_selectionCornerRow, m_selectionCornerColumn;
LevelOnePage *m_selectionSubPage;
};