QMargins Class
The QMargins class defines the four margins of a rectangle. 更多...
| 头文件: | #include <QMargins> |
| qmake: | QT += core |
| 开始支持版本: | Qt 4.6 |
公有函数
| QMargins() | |
| QMargins(int left, int top, int right, int bottom) | |
| int | bottom() const |
| bool | isNull() const |
| int | left() const |
| int | right() const |
| void | setBottom(int bottom) |
| void | setLeft(int left) |
| void | setRight(int right) |
| void | setTop(int Top) |
| int | top() const |
| QMargins & | operator*=(int factor) |
| QMargins & | operator*=(qreal factor) |
| QMargins & | operator+=(const QMargins &margins) |
| QMargins & | operator+=(int addend) |
| QMargins & | operator-=(const QMargins &margins) |
| QMargins & | operator-=(int subtrahend) |
| QMargins & | operator/=(int divisor) |
| QMargins & | operator/=(qreal divisor) |
相关非成员
| bool | operator!=(const QMargins &m1, const QMargins &m2) |
| QMargins | operator*(const QMargins &margins, int factor) |
| QMargins | operator*(int factor, const QMargins &margins) |
| QMargins | operator*(const QMargins &margins, qreal factor) |
| QMargins | operator*(qreal factor, const QMargins &margins) |
| QMargins | operator+(const QMargins &m1, const QMargins &m2) |
| QMargins | operator+(const QMargins &lhs, int rhs) |
| QMargins | operator+(int lhs, const QMargins &rhs) |
| QMargins | operator+(const QMargins &margins) |
| QMargins | operator-(const QMargins &m1, const QMargins &m2) |
| QMargins | operator-(const QMargins &lhs, int rhs) |
| QMargins | operator-(const QMargins &margins) |
| QMargins | operator/(const QMargins &margins, int divisor) |
| QMargins | operator/(const QMargins &margins, qreal divisor) |
| QDataStream & | operator<<(QDataStream &stream, const QMargins &m) |
| bool | operator==(const QMargins &m1, const QMargins &m2) |
| QDataStream & | operator>>(QDataStream &stream, QMargins &m) |
详细描述
The QMargins class defines the four margins of a rectangle.
QMargin defines a set of four margins; left, top, right and bottom, that describe the size of the borders surrounding a rectangle.
The isNull() function returns true only if all margins are set to zero.
QMargin objects can be streamed as well as compared.
成员函数
QMargins::QMargins()
Constructs a margins object with all margins set to 0.
参见 isNull().
QMargins::QMargins(int left, int top, int right, int bottom)
Constructs margins with the given left, top, right, bottom
参见 setLeft(), setRight(), setTop(), and setBottom().
int QMargins::bottom() const
Returns the bottom margin.
参见 setBottom().
bool QMargins::isNull() const
Returns true if all margins are is 0; otherwise returns false.
int QMargins::left() const
Returns the left margin.
参见 setLeft().
int QMargins::right() const
Returns the right margin.
参见 setRight().
void QMargins::setBottom(int bottom)
Sets the bottom margin to bottom.
参见 bottom().
void QMargins::setLeft(int left)
Sets the left margin to left.
参见 left().
void QMargins::setRight(int right)
Sets the right margin to right.
参见 right().
void QMargins::setTop(int Top)
Sets the Top margin to Top.
参见 top().
int QMargins::top() const
Returns the top margin.
参见 setTop().
QMargins &QMargins::operator*=(int factor)
Multiplies each component of this object by factor and returns a reference to it.
This function was introduced in Qt 5.1.
参见 operator/=().
QMargins &QMargins::operator*=(qreal factor)
This is an overloaded function.
Multiplies each component of this object by factor and returns a reference to it.
This function was introduced in Qt 5.1.
参见 operator/=().
QMargins &QMargins::operator+=(const QMargins &margins)
Add each component of margins to the respective component of this object and returns a reference to it.
This function was introduced in Qt 5.1.
参见 operator-=().
QMargins &QMargins::operator+=(int addend)
This is an overloaded function.
Adds the addend to each component of this object and returns a reference to it.
参见 operator-=().
QMargins &QMargins::operator-=(const QMargins &margins)
Subtract each component of margins from the respective component of this object and returns a reference to it.
This function was introduced in Qt 5.1.
参见 operator+=().
QMargins &QMargins::operator-=(int subtrahend)
This is an overloaded function.
Subtracts the subtrahend from each component of this object and returns a reference to it.
参见 operator+=().
QMargins &QMargins::operator/=(int divisor)
Divides each component of this object by divisor and returns a reference to it.
This function was introduced in Qt 5.1.
参见 operator*=().
QMargins &QMargins::operator/=(qreal divisor)
This is an overloaded function.
This function was introduced in Qt 5.1.
参见 operator*=().
相关非成员
bool operator!=(const QMargins &m1, const QMargins &m2)
Returns true if m1 and m2 are different; otherwise returns false.
QMargins operator*(const QMargins &margins, int factor)
Returns a QMargins object that is formed by multiplying each component of the given margins by factor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QMargins operator*(int factor, const QMargins &margins)
This is an overloaded function.
Returns a QMargins object that is formed by multiplying each component of the given margins by factor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QMargins operator*(const QMargins &margins, qreal factor)
This is an overloaded function.
Returns a QMargins object that is formed by multiplying each component of the given margins by factor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QMargins operator*(qreal factor, const QMargins &margins)
This is an overloaded function.
Returns a QMargins object that is formed by multiplying each component of the given margins by factor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QMargins operator+(const QMargins &m1, const QMargins &m2)
Returns a QMargins object that is the sum of the given margins, m1 and m2; each component is added separately.
This function was introduced in Qt 5.1.
参见 QMargins::operator+=() and QMargins::operator-=().
QMargins operator+(const QMargins &lhs, int rhs)
Returns a QMargins object that is formed by adding rhs to lhs.
This function was introduced in Qt 5.3.
参见 QMargins::operator+=() and QMargins::operator-=().
QMargins operator+(int lhs, const QMargins &rhs)
Returns a QMargins object that is formed by adding lhs to rhs.
This function was introduced in Qt 5.3.
参见 QMargins::operator+=() and QMargins::operator-=().
QMargins operator+(const QMargins &margins)
Returns a QMargin object that is formed from all components of margins.
This function was introduced in Qt 5.3.
QMargins operator-(const QMargins &m1, const QMargins &m2)
Returns a QMargins object that is formed by subtracting m2 from m1; each component is subtracted separately.
This function was introduced in Qt 5.1.
参见 QMargins::operator+=() and QMargins::operator-=().
QMargins operator-(const QMargins &lhs, int rhs)
Returns a QMargins object that is formed by subtracting rhs from lhs.
This function was introduced in Qt 5.3.
参见 QMargins::operator+=() and QMargins::operator-=().
QMargins operator-(const QMargins &margins)
Returns a QMargin object that is formed by negating all components of margins.
This function was introduced in Qt 5.1.
QMargins operator/(const QMargins &margins, int divisor)
Returns a QMargins object that is formed by dividing the components of the given margins by the given divisor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QMargins operator/(const QMargins &margins, qreal divisor)
This is an overloaded function.
Returns a QMargins object that is formed by dividing the components of the given margins by the given divisor.
This function was introduced in Qt 5.1.
参见 QMargins::operator*=() and QMargins::operator/=().
QDataStream &operator<<(QDataStream &stream, const QMargins &m)
Writes margin m to the given stream and returns a reference to the stream.
bool operator==(const QMargins &m1, const QMargins &m2)
Returns true if m1 and m2 are equal; otherwise returns false.
QDataStream &operator>>(QDataStream &stream, QMargins &m)
Reads a margin from the given stream into margin m and returns a reference to the stream.