diff options
author | Lars Knoll <lars.knoll@nokia.com> | 2011-05-07 00:02:01 +0200 |
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committer | Lars Knoll <lars.knoll@nokia.com> | 2011-05-07 00:02:01 +0200 |
commit | f67b8df3ebdba2d398b9cce686b7c644adffff08 (patch) | |
tree | 062dd469f7cf8daa01a32d3e7b767b8fbdb7573a /src/widgets/styles/qdrawutil.cpp | |
parent | 32ce4fe9e6a94e77828e976776cf08da85254ff2 (diff) | |
download | qtbase-f67b8df3ebdba2d398b9cce686b7c644adffff08.tar.gz |
library split
Diffstat (limited to 'src/widgets/styles/qdrawutil.cpp')
-rw-r--r-- | src/widgets/styles/qdrawutil.cpp | 1053 |
1 files changed, 1053 insertions, 0 deletions
diff --git a/src/widgets/styles/qdrawutil.cpp b/src/widgets/styles/qdrawutil.cpp new file mode 100644 index 0000000000..c674da8394 --- /dev/null +++ b/src/widgets/styles/qdrawutil.cpp @@ -0,0 +1,1053 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qdrawutil.h" +#include "qbitmap.h" +#include "qpixmapcache.h" +#include "qpainter.h" +#include "qpalette.h" +#include <private/qpaintengineex_p.h> +#include <qvarlengtharray.h> +#include <qmath.h> +#include <private/qhexstring_p.h> + +QT_BEGIN_NAMESPACE + +/*! + \headerfile <qdrawutil.h> + \title Drawing Utility Functions + + \sa QPainter +*/ + +/*! + \fn void qDrawShadeLine(QPainter *painter, int x1, int y1, int x2, int y2, + const QPalette &palette, bool sunken, + int lineWidth, int midLineWidth) + \relates <qdrawutil.h> + + Draws a horizontal (\a y1 == \a y2) or vertical (\a x1 == \a x2) + shaded line using the given \a painter. Note that nothing is + drawn if \a y1 != \a y2 and \a x1 != \a x2 (i.e. the line is + neither horizontal nor vertical). + + The provided \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). The given \a lineWidth + specifies the line width for each of the lines; it is not the + total line width. The given \a midLineWidth specifies the width of + a middle line drawn in the QPalette::mid() color. + + The line appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to + make widgets that follow the current GUI style. + + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded line: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 0 + + \sa qDrawShadeRect(), qDrawShadePanel(), QStyle +*/ + +void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2, + const QPalette &pal, bool sunken, + int lineWidth, int midLineWidth) +{ + if (!(p && lineWidth >= 0 && midLineWidth >= 0)) { + qWarning("qDrawShadeLine: Invalid parameters"); + return; + } + int tlw = lineWidth*2 + midLineWidth; // total line width + QPen oldPen = p->pen(); // save pen + if (sunken) + p->setPen(pal.color(QPalette::Dark)); + else + p->setPen(pal.light().color()); + QPolygon a; + int i; + if (y1 == y2) { // horizontal line + int y = y1 - tlw/2; + if (x1 > x2) { // swap x1 and x2 + int t = x1; + x1 = x2; + x2 = t; + } + x2--; + for (i=0; i<lineWidth; i++) { // draw top shadow + a.setPoints(3, x1+i, y+tlw-1-i, + x1+i, y+i, + x2-i, y+i); + p->drawPolyline(a); + } + if (midLineWidth > 0) { + p->setPen(pal.mid().color()); + for (i=0; i<midLineWidth; i++) // draw lines in the middle + p->drawLine(x1+lineWidth, y+lineWidth+i, + x2-lineWidth, y+lineWidth+i); + } + if (sunken) + p->setPen(pal.light().color()); + else + p->setPen(pal.dark().color()); + for (i=0; i<lineWidth; i++) { // draw bottom shadow + a.setPoints(3, x1+i, y+tlw-i-1, + x2-i, y+tlw-i-1, + x2-i, y+i+1); + p->drawPolyline(a); + } + } + else if (x1 == x2) { // vertical line + int x = x1 - tlw/2; + if (y1 > y2) { // swap y1 and y2 + int t = y1; + y1 = y2; + y2 = t; + } + y2--; + for (i=0; i<lineWidth; i++) { // draw left shadow + a.setPoints(3, x+i, y2, + x+i, y1+i, + x+tlw-1, y1+i); + p->drawPolyline(a); + } + if (midLineWidth > 0) { + p->setPen(pal.mid().color()); + for (i=0; i<midLineWidth; i++) // draw lines in the middle + p->drawLine(x+lineWidth+i, y1+lineWidth, x+lineWidth+i, y2); + } + if (sunken) + p->setPen(pal.light().color()); + else + p->setPen(pal.dark().color()); + for (i=0; i<lineWidth; i++) { // draw right shadow + a.setPoints(3, x+lineWidth, y2-i, + x+tlw-i-1, y2-i, + x+tlw-i-1, y1+lineWidth); + p->drawPolyline(a); + } + } + p->setPen(oldPen); +} + +/*! + \fn void qDrawShadeRect(QPainter *painter, int x, int y, int width, int height, + const QPalette &palette, bool sunken, + int lineWidth, int midLineWidth, + const QBrush *fill) + \relates <qdrawutil.h> + + Draws the shaded rectangle beginning at (\a x, \a y) with the + given \a width and \a height using the provided \a painter. + + The provide \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors. The given \a lineWidth + specifies the line width for each of the lines; it is not the + total line width. The \a midLineWidth specifies the width of a + middle line drawn in the QPalette::mid() color. The rectangle's + interior is filled with the \a fill brush unless \a fill is 0. + + The rectangle appears sunken if \a sunken is true, otherwise + raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded rectangle: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 1 + + \sa qDrawShadeLine(), qDrawShadePanel(), qDrawPlainRect(), QStyle +*/ + +void qDrawShadeRect(QPainter *p, int x, int y, int w, int h, + const QPalette &pal, bool sunken, + int lineWidth, int midLineWidth, + const QBrush *fill) +{ + if (w == 0 || h == 0) + return; + if (! (w > 0 && h > 0 && lineWidth >= 0 && midLineWidth >= 0)) { + qWarning("qDrawShadeRect: Invalid parameters"); + return; + } + QPen oldPen = p->pen(); + if (sunken) + p->setPen(pal.dark().color()); + else + p->setPen(pal.light().color()); + int x1=x, y1=y, x2=x+w-1, y2=y+h-1; + + if (lineWidth == 1 && midLineWidth == 0) {// standard shade rectangle + p->drawRect(x1, y1, w-2, h-2); + if (sunken) + p->setPen(pal.light().color()); + else + p->setPen(pal.dark().color()); + QLineF lines[4] = { QLineF(x1+1, y1+1, x2-2, y1+1), + QLineF(x1+1, y1+2, x1+1, y2-2), + QLineF(x1, y2, x2, y2), + QLineF(x2,y1, x2,y2-1) }; + p->drawLines(lines, 4); // draw bottom/right lines + } else { // more complicated + int m = lineWidth+midLineWidth; + int i, j=0, k=m; + for (i=0; i<lineWidth; i++) { // draw top shadow + QLineF lines[4] = { QLineF(x1+i, y2-i, x1+i, y1+i), + QLineF(x1+i, y1+i, x2-i, y1+i), + QLineF(x1+k, y2-k, x2-k, y2-k), + QLineF(x2-k, y2-k, x2-k, y1+k) }; + p->drawLines(lines, 4); + k++; + } + p->setPen(pal.mid().color()); + j = lineWidth*2; + for (i=0; i<midLineWidth; i++) { // draw lines in the middle + p->drawRect(x1+lineWidth+i, y1+lineWidth+i, w-j-1, h-j-1); + j += 2; + } + if (sunken) + p->setPen(pal.light().color()); + else + p->setPen(pal.dark().color()); + k = m; + for (i=0; i<lineWidth; i++) { // draw bottom shadow + QLineF lines[4] = { QLineF(x1+1+i, y2-i, x2-i, y2-i), + QLineF(x2-i, y2-i, x2-i, y1+i+1), + QLineF(x1+k, y2-k, x1+k, y1+k), + QLineF(x1+k, y1+k, x2-k, y1+k) }; + p->drawLines(lines, 4); + k++; + } + } + if (fill) { + QBrush oldBrush = p->brush(); + int tlw = lineWidth + midLineWidth; + p->setPen(Qt::NoPen); + p->setBrush(*fill); + p->drawRect(x+tlw, y+tlw, w-2*tlw, h-2*tlw); + p->setBrush(oldBrush); + } + p->setPen(oldPen); // restore pen +} + + +/*! + \fn void qDrawShadePanel(QPainter *painter, int x, int y, int width, int height, + const QPalette &palette, bool sunken, + int lineWidth, const QBrush *fill) + \relates <qdrawutil.h> + + Draws the shaded panel beginning at (\a x, \a y) with the given \a + width and \a height using the provided \a painter and the given \a + lineWidth. + + The given \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). The panel's interior is filled + with the \a fill brush unless \a fill is 0. + + The panel appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded panel: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 2 + + \sa qDrawWinPanel(), qDrawShadeLine(), qDrawShadeRect(), QStyle +*/ + +void qDrawShadePanel(QPainter *p, int x, int y, int w, int h, + const QPalette &pal, bool sunken, + int lineWidth, const QBrush *fill) +{ + if (w == 0 || h == 0) + return; + if (!(w > 0 && h > 0 && lineWidth >= 0)) { + qWarning("qDrawShadePanel: Invalid parameters"); + } + QColor shade = pal.dark().color(); + QColor light = pal.light().color(); + if (fill) { + if (fill->color() == shade) + shade = pal.shadow().color(); + if (fill->color() == light) + light = pal.midlight().color(); + } + QPen oldPen = p->pen(); // save pen + QVector<QLineF> lines; + lines.reserve(2*lineWidth); + + if (sunken) + p->setPen(shade); + else + p->setPen(light); + int x1, y1, x2, y2; + int i; + x1 = x; + y1 = y2 = y; + x2 = x+w-2; + for (i=0; i<lineWidth; i++) { // top shadow + lines << QLineF(x1, y1++, x2--, y2++); + } + x2 = x1; + y1 = y+h-2; + for (i=0; i<lineWidth; i++) { // left shado + lines << QLineF(x1++, y1, x2++, y2--); + } + p->drawLines(lines); + lines.clear(); + if (sunken) + p->setPen(light); + else + p->setPen(shade); + x1 = x; + y1 = y2 = y+h-1; + x2 = x+w-1; + for (i=0; i<lineWidth; i++) { // bottom shadow + lines << QLineF(x1++, y1--, x2, y2--); + } + x1 = x2; + y1 = y; + y2 = y+h-lineWidth-1; + for (i=0; i<lineWidth; i++) { // right shadow + lines << QLineF(x1--, y1++, x2--, y2); + } + p->drawLines(lines); + if (fill) // fill with fill color + p->fillRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2, *fill); + p->setPen(oldPen); // restore pen +} + + +/*! + \internal + This function draws a rectangle with two pixel line width. + It is called from qDrawWinButton() and qDrawWinPanel(). + + c1..c4 and fill are used: + + 1 1 1 1 1 2 + 1 3 3 3 4 2 + 1 3 F F 4 2 + 1 3 F F 4 2 + 1 4 4 4 4 2 + 2 2 2 2 2 2 +*/ + +static void qDrawWinShades(QPainter *p, + int x, int y, int w, int h, + const QColor &c1, const QColor &c2, + const QColor &c3, const QColor &c4, + const QBrush *fill) +{ + if (w < 2 || h < 2) // can't do anything with that + return; + QPen oldPen = p->pen(); + QPoint a[3] = { QPoint(x, y+h-2), QPoint(x, y), QPoint(x+w-2, y) }; + p->setPen(c1); + p->drawPolyline(a, 3); + QPoint b[3] = { QPoint(x, y+h-1), QPoint(x+w-1, y+h-1), QPoint(x+w-1, y) }; + p->setPen(c2); + p->drawPolyline(b, 3); + if (w > 4 && h > 4) { + QPoint c[3] = { QPoint(x+1, y+h-3), QPoint(x+1, y+1), QPoint(x+w-3, y+1) }; + p->setPen(c3); + p->drawPolyline(c, 3); + QPoint d[3] = { QPoint(x+1, y+h-2), QPoint(x+w-2, y+h-2), QPoint(x+w-2, y+1) }; + p->setPen(c4); + p->drawPolyline(d, 3); + if (fill) + p->fillRect(QRect(x+2, y+2, w-4, h-4), *fill); + } + p->setPen(oldPen); +} + + +/*! + \fn void qDrawWinButton(QPainter *painter, int x, int y, int width, int height, + const QPalette &palette, bool sunken, + const QBrush *fill) + \relates <qdrawutil.h> + + Draws the Windows-style button specified by the given point (\a x, + \a y}, \a width and \a height using the provided \a painter with a + line width of 2 pixels. The button's interior is filled with the + \a{fill} brush unless \a fill is 0. + + The given \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). + + The button appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style()-> Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + \sa qDrawWinPanel(), QStyle +*/ + +void qDrawWinButton(QPainter *p, int x, int y, int w, int h, + const QPalette &pal, bool sunken, + const QBrush *fill) +{ + if (sunken) + qDrawWinShades(p, x, y, w, h, + pal.shadow().color(), pal.light().color(), pal.dark().color(), + pal.button().color(), fill); + else + qDrawWinShades(p, x, y, w, h, + pal.light().color(), pal.shadow().color(), pal.button().color(), + pal.dark().color(), fill); +} + +/*! + \fn void qDrawWinPanel(QPainter *painter, int x, int y, int width, int height, + const QPalette &palette, bool sunken, + const QBrush *fill) + \relates <qdrawutil.h> + + Draws the Windows-style panel specified by the given point(\a x, + \a y), \a width and \a height using the provided \a painter with a + line width of 2 pixels. The button's interior is filled with the + \a fill brush unless \a fill is 0. + + The given \a palette specifies the shading colors. The panel + appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded panel: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 3 + + \sa qDrawShadePanel(), qDrawWinButton(), QStyle +*/ + +void qDrawWinPanel(QPainter *p, int x, int y, int w, int h, + const QPalette &pal, bool sunken, + const QBrush *fill) +{ + if (sunken) + qDrawWinShades(p, x, y, w, h, + pal.dark().color(), pal.light().color(), pal.shadow().color(), + pal.midlight().color(), fill); + else + qDrawWinShades(p, x, y, w, h, + pal.light().color(), pal.shadow().color(), pal.midlight().color(), + pal.dark().color(), fill); +} + +/*! + \fn void qDrawPlainRect(QPainter *painter, int x, int y, int width, int height, const QColor &lineColor, + int lineWidth, const QBrush *fill) + \relates <qdrawutil.h> + + Draws the plain rectangle beginning at (\a x, \a y) with the given + \a width and \a height, using the specified \a painter, \a lineColor + and \a lineWidth. The rectangle's interior is filled with the \a + fill brush unless \a fill is 0. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a plain rectangle: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 4 + + \sa qDrawShadeRect(), QStyle +*/ + +void qDrawPlainRect(QPainter *p, int x, int y, int w, int h, const QColor &c, + int lineWidth, const QBrush *fill) +{ + if (w == 0 || h == 0) + return; + if (!(w > 0 && h > 0 && lineWidth >= 0)) { + qWarning("qDrawPlainRect: Invalid parameters"); + } + QPen oldPen = p->pen(); + QBrush oldBrush = p->brush(); + p->setPen(c); + p->setBrush(Qt::NoBrush); + for (int i=0; i<lineWidth; i++) + p->drawRect(x+i, y+i, w-i*2 - 1, h-i*2 - 1); + if (fill) { // fill with fill color + p->setPen(Qt::NoPen); + p->setBrush(*fill); + p->drawRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2); + } + p->setPen(oldPen); + p->setBrush(oldBrush); +} + +/***************************************************************************** + Overloaded functions. + *****************************************************************************/ + +/*! + \fn void qDrawShadeLine(QPainter *painter, const QPoint &p1, const QPoint &p2, + const QPalette &palette, bool sunken, int lineWidth, int midLineWidth) + \relates <qdrawutil.h> + \overload + + Draws a horizontal or vertical shaded line between \a p1 and \a p2 + using the given \a painter. Note that nothing is drawn if the line + between the points would be neither horizontal nor vertical. + + The provided \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). The given \a lineWidth + specifies the line width for each of the lines; it is not the + total line width. The given \a midLineWidth specifies the width of + a middle line drawn in the QPalette::mid() color. + + The line appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to + make widgets that follow the current GUI style. + + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded line: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 5 + + \sa qDrawShadeRect(), qDrawShadePanel(), QStyle +*/ + +void qDrawShadeLine(QPainter *p, const QPoint &p1, const QPoint &p2, + const QPalette &pal, bool sunken, + int lineWidth, int midLineWidth) +{ + qDrawShadeLine(p, p1.x(), p1.y(), p2.x(), p2.y(), pal, sunken, + lineWidth, midLineWidth); +} + +/*! + \fn void qDrawShadeRect(QPainter *painter, const QRect &rect, const QPalette &palette, + bool sunken, int lineWidth, int midLineWidth, const QBrush *fill) + \relates <qdrawutil.h> + \overload + + Draws the shaded rectangle specified by \a rect using the given \a painter. + + The provide \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors. The given \a lineWidth + specifies the line width for each of the lines; it is not the + total line width. The \a midLineWidth specifies the width of a + middle line drawn in the QPalette::mid() color. The rectangle's + interior is filled with the \a fill brush unless \a fill is 0. + + The rectangle appears sunken if \a sunken is true, otherwise + raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded rectangle: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 6 + + \sa qDrawShadeLine(), qDrawShadePanel(), qDrawPlainRect(), QStyle +*/ + +void qDrawShadeRect(QPainter *p, const QRect &r, + const QPalette &pal, bool sunken, + int lineWidth, int midLineWidth, + const QBrush *fill) +{ + qDrawShadeRect(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, + lineWidth, midLineWidth, fill); +} + +/*! + \fn void qDrawShadePanel(QPainter *painter, const QRect &rect, const QPalette &palette, + bool sunken, int lineWidth, const QBrush *fill) + \relates <qdrawutil.h> + \overload + + Draws the shaded panel at the rectangle specified by \a rect using the + given \a painter and the given \a lineWidth. + + The given \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). The panel's interior is filled + with the \a fill brush unless \a fill is 0. + + The panel appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded panel: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 7 + + \sa qDrawWinPanel(), qDrawShadeLine(), qDrawShadeRect(), QStyle +*/ + +void qDrawShadePanel(QPainter *p, const QRect &r, + const QPalette &pal, bool sunken, + int lineWidth, const QBrush *fill) +{ + qDrawShadePanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, + lineWidth, fill); +} + +/*! + \fn void qDrawWinButton(QPainter *painter, const QRect &rect, const QPalette &palette, + bool sunken, const QBrush *fill) + \relates <qdrawutil.h> + \overload + + Draws the Windows-style button at the rectangle specified by \a rect using + the given \a painter with a line width of 2 pixels. The button's interior + is filled with the \a{fill} brush unless \a fill is 0. + + The given \a palette specifies the shading colors (\l + {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l + {QPalette::mid()}{middle} colors). + + The button appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style()-> Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + \sa qDrawWinPanel(), QStyle +*/ + +void qDrawWinButton(QPainter *p, const QRect &r, + const QPalette &pal, bool sunken, const QBrush *fill) +{ + qDrawWinButton(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill); +} + +/*! + \fn void qDrawWinPanel(QPainter *painter, const QRect &rect, const QPalette &palette, + bool sunken, const QBrush *fill) + \overload + + Draws the Windows-style panel at the rectangle specified by \a rect using + the given \a painter with a line width of 2 pixels. The button's interior + is filled with the \a fill brush unless \a fill is 0. + + The given \a palette specifies the shading colors. The panel + appears sunken if \a sunken is true, otherwise raised. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a shaded panel: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 8 + + \sa qDrawShadePanel(), qDrawWinButton(), QStyle +*/ + +void qDrawWinPanel(QPainter *p, const QRect &r, + const QPalette &pal, bool sunken, const QBrush *fill) +{ + qDrawWinPanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill); +} + +/*! + \fn void qDrawPlainRect(QPainter *painter, const QRect &rect, const QColor &lineColor, int lineWidth, const QBrush *fill) + \relates <qdrawutil.h> + \overload + + Draws the plain rectangle specified by \a rect using the given \a painter, + \a lineColor and \a lineWidth. The rectangle's interior is filled with the + \a fill brush unless \a fill is 0. + + \warning This function does not look at QWidget::style() or + QApplication::style(). Use the drawing functions in QStyle to make + widgets that follow the current GUI style. + + Alternatively you can use a QFrame widget and apply the + QFrame::setFrameStyle() function to display a plain rectangle: + + \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 9 + + \sa qDrawShadeRect(), QStyle +*/ + +void qDrawPlainRect(QPainter *p, const QRect &r, const QColor &c, + int lineWidth, const QBrush *fill) +{ + qDrawPlainRect(p, r.x(), r.y(), r.width(), r.height(), c, + lineWidth, fill); +} + + +/*! + \class QTileRules + \since 4.6 + + Holds the rules used to draw a pixmap or image split into nine segments, + similar to \l{http://www.w3.org/TR/css3-background/}{CSS3 border-images}. + + \sa Qt::TileRule, QMargins +*/ + +/*! \fn QTileRules::QTileRules(Qt::TileRule horizontalRule, Qt::TileRule verticalRule) + Constructs a QTileRules with the given \a horizontalRule and + \a verticalRule. + */ + +/*! \fn QTileRules::QTileRules(Qt::TileRule rule) + Constructs a QTileRules with the given \a rule used for both + the horizontal rule and the vertical rule. + */ + +/*! + \fn void qDrawBorderPixmap(QPainter *painter, const QRect &target, const QMargins &margins, const QPixmap &pixmap) + \relates <qdrawutil.h> + \since 4.6 + \overload + + \brief The qDrawBorderPixmap function is for drawing a pixmap into + the margins of a rectangle. + + Draws the given \a pixmap into the given \a target rectangle, using the + given \a painter. The pixmap will be split into nine segments and drawn + according to the \a margins structure. +*/ + +typedef QVarLengthArray<QPainter::PixmapFragment, 16> QPixmapFragmentsArray; + +/*! + \since 4.6 + + Draws the indicated \a sourceRect rectangle from the given \a pixmap into + the given \a targetRect rectangle, using the given \a painter. The pixmap + will be split into nine segments according to the given \a targetMargins + and \a sourceMargins structures. Finally, the pixmap will be drawn + according to the given \a rules. + + This function is used to draw a scaled pixmap, similar to + \l{http://www.w3.org/TR/css3-background/}{CSS3 border-images} + + \sa Qt::TileRule, QTileRules, QMargins +*/ + +void qDrawBorderPixmap(QPainter *painter, const QRect &targetRect, const QMargins &targetMargins, + const QPixmap &pixmap, const QRect &sourceRect,const QMargins &sourceMargins, + const QTileRules &rules, QDrawBorderPixmap::DrawingHints hints) +{ + QPainter::PixmapFragment d; + d.opacity = 1.0; + d.rotation = 0.0; + + QPixmapFragmentsArray opaqueData; + QPixmapFragmentsArray translucentData; + + // source center + const int sourceCenterTop = sourceRect.top() + sourceMargins.top(); + const int sourceCenterLeft = sourceRect.left() + sourceMargins.left(); + const int sourceCenterBottom = sourceRect.bottom() - sourceMargins.bottom() + 1; + const int sourceCenterRight = sourceRect.right() - sourceMargins.right() + 1; + const int sourceCenterWidth = sourceCenterRight - sourceCenterLeft; + const int sourceCenterHeight = sourceCenterBottom - sourceCenterTop; + // target center + const int targetCenterTop = targetRect.top() + targetMargins.top(); + const int targetCenterLeft = targetRect.left() + targetMargins.left(); + const int targetCenterBottom = targetRect.bottom() - targetMargins.bottom() + 1; + const int targetCenterRight = targetRect.right() - targetMargins.right() + 1; + const int targetCenterWidth = targetCenterRight - targetCenterLeft; + const int targetCenterHeight = targetCenterBottom - targetCenterTop; + + QVarLengthArray<qreal, 16> xTarget; // x-coordinates of target rectangles + QVarLengthArray<qreal, 16> yTarget; // y-coordinates of target rectangles + + int columns = 3; + int rows = 3; + if (rules.horizontal != Qt::StretchTile && sourceCenterWidth != 0) + columns = qMax(3, 2 + qCeil(targetCenterWidth / qreal(sourceCenterWidth))); + if (rules.vertical != Qt::StretchTile && sourceCenterHeight != 0) + rows = qMax(3, 2 + qCeil(targetCenterHeight / qreal(sourceCenterHeight))); + + xTarget.resize(columns + 1); + yTarget.resize(rows + 1); + + bool oldAA = painter->testRenderHint(QPainter::Antialiasing); + if (painter->paintEngine()->type() != QPaintEngine::OpenGL + && painter->paintEngine()->type() != QPaintEngine::OpenGL2 + && oldAA && painter->combinedTransform().type() != QTransform::TxNone) { + painter->setRenderHint(QPainter::Antialiasing, false); + } + + xTarget[0] = targetRect.left(); + xTarget[1] = targetCenterLeft; + xTarget[columns - 1] = targetCenterRight; + xTarget[columns] = targetRect.left() + targetRect.width(); + + yTarget[0] = targetRect.top(); + yTarget[1] = targetCenterTop; + yTarget[rows - 1] = targetCenterBottom; + yTarget[rows] = targetRect.top() + targetRect.height(); + + qreal dx = targetCenterWidth; + qreal dy = targetCenterHeight; + + switch (rules.horizontal) { + case Qt::StretchTile: + dx = targetCenterWidth; + break; + case Qt::RepeatTile: + dx = sourceCenterWidth; + break; + case Qt::RoundTile: + dx = targetCenterWidth / qreal(columns - 2); + break; + } + + for (int i = 2; i < columns - 1; ++i) + xTarget[i] = xTarget[i - 1] + dx; + + switch (rules.vertical) { + case Qt::StretchTile: + dy = targetCenterHeight; + break; + case Qt::RepeatTile: + dy = sourceCenterHeight; + break; + case Qt::RoundTile: + dy = targetCenterHeight / qreal(rows - 2); + break; + } + + for (int i = 2; i < rows - 1; ++i) + yTarget[i] = yTarget[i - 1] + dy; + + // corners + if (targetMargins.top() > 0 && targetMargins.left() > 0 && sourceMargins.top() > 0 && sourceMargins.left() > 0) { // top left + d.x = (0.5 * (xTarget[1] + xTarget[0])); + d.y = (0.5 * (yTarget[1] + yTarget[0])); + d.sourceLeft = sourceRect.left(); + d.sourceTop = sourceRect.top(); + d.width = sourceMargins.left(); + d.height = sourceMargins.top(); + d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width; + d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height; + if (hints & QDrawBorderPixmap::OpaqueTopLeft) + opaqueData.append(d); + else + translucentData.append(d); + } + if (targetMargins.top() > 0 && targetMargins.right() > 0 && sourceMargins.top() > 0 && sourceMargins.right() > 0) { // top right + d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1])); + d.y = (0.5 * (yTarget[1] + yTarget[0])); + d.sourceLeft = sourceCenterRight; + d.sourceTop = sourceRect.top(); + d.width = sourceMargins.right(); + d.height = sourceMargins.top(); + d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width; + d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height; + if (hints & QDrawBorderPixmap::OpaqueTopRight) + opaqueData.append(d); + else + translucentData.append(d); + } + if (targetMargins.bottom() > 0 && targetMargins.left() > 0 && sourceMargins.bottom() > 0 && sourceMargins.left() > 0) { // bottom left + d.x = (0.5 * (xTarget[1] + xTarget[0])); + d.y =(0.5 * (yTarget[rows] + yTarget[rows - 1])); + d.sourceLeft = sourceRect.left(); + d.sourceTop = sourceCenterBottom; + d.width = sourceMargins.left(); + d.height = sourceMargins.bottom(); + d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width; + d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height; + if (hints & QDrawBorderPixmap::OpaqueBottomLeft) + opaqueData.append(d); + else + translucentData.append(d); + } + if (targetMargins.bottom() > 0 && targetMargins.right() > 0 && sourceMargins.bottom() > 0 && sourceMargins.right() > 0) { // bottom right + d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1])); + d.y = (0.5 * (yTarget[rows] + yTarget[rows - 1])); + d.sourceLeft = sourceCenterRight; + d.sourceTop = sourceCenterBottom; + d.width = sourceMargins.right(); + d.height = sourceMargins.bottom(); + d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width; + d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height; + if (hints & QDrawBorderPixmap::OpaqueBottomRight) + opaqueData.append(d); + else + translucentData.append(d); + } + + // horizontal edges + if (targetCenterWidth > 0 && sourceCenterWidth > 0) { + if (targetMargins.top() > 0 && sourceMargins.top() > 0) { // top + QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueTop ? opaqueData : translucentData; + d.sourceLeft = sourceCenterLeft; + d.sourceTop = sourceRect.top(); + d.width = sourceCenterWidth; + d.height = sourceMargins.top(); + d.y = (0.5 * (yTarget[1] + yTarget[0])); + d.scaleX = dx / d.width; + d.scaleY = qreal(yTarget[1] - yTarget[0]) / d.height; + for (int i = 1; i < columns - 1; ++i) { + d.x = (0.5 * (xTarget[i + 1] + xTarget[i])); + data.append(d); + } + if (rules.horizontal == Qt::RepeatTile) + data[data.size() - 1].width = ((xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX); + } + if (targetMargins.bottom() > 0 && sourceMargins.bottom() > 0) { // bottom + QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueBottom ? opaqueData : translucentData; + d.sourceLeft = sourceCenterLeft; + d.sourceTop = sourceCenterBottom; + d.width = sourceCenterWidth; + d.height = sourceMargins.bottom(); + d.y = (0.5 * (yTarget[rows] + yTarget[rows - 1])); + d.scaleX = dx / d.width; + d.scaleY = qreal(yTarget[rows] - yTarget[rows - 1]) / d.height; + for (int i = 1; i < columns - 1; ++i) { + d.x = (0.5 * (xTarget[i + 1] + xTarget[i])); + data.append(d); + } + if (rules.horizontal == Qt::RepeatTile) + data[data.size() - 1].width = ((xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX); + } + } + + // vertical edges + if (targetCenterHeight > 0 && sourceCenterHeight > 0) { + if (targetMargins.left() > 0 && sourceMargins.left() > 0) { // left + QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueLeft ? opaqueData : translucentData; + d.sourceLeft = sourceRect.left(); + d.sourceTop = sourceCenterTop; + d.width = sourceMargins.left(); + d.height = sourceCenterHeight; + d.x = (0.5 * (xTarget[1] + xTarget[0])); + d.scaleX = qreal(xTarget[1] - xTarget[0]) / d.width; + d.scaleY = dy / d.height; + for (int i = 1; i < rows - 1; ++i) { + d.y = (0.5 * (yTarget[i + 1] + yTarget[i])); + data.append(d); + } + if (rules.vertical == Qt::RepeatTile) + data[data.size() - 1].height = ((yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY); + } + if (targetMargins.right() > 0 && sourceMargins.right() > 0) { // right + QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueRight ? opaqueData : translucentData; + d.sourceLeft = sourceCenterRight; + d.sourceTop = sourceCenterTop; + d.width = sourceMargins.right(); + d.height = sourceCenterHeight; + d.x = (0.5 * (xTarget[columns] + xTarget[columns - 1])); + d.scaleX = qreal(xTarget[columns] - xTarget[columns - 1]) / d.width; + d.scaleY = dy / d.height; + for (int i = 1; i < rows - 1; ++i) { + d.y = (0.5 * (yTarget[i + 1] + yTarget[i])); + data.append(d); + } + if (rules.vertical == Qt::RepeatTile) + data[data.size() - 1].height = ((yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY); + } + } + + // center + if (targetCenterWidth > 0 && targetCenterHeight > 0 && sourceCenterWidth > 0 && sourceCenterHeight > 0) { + QPixmapFragmentsArray &data = hints & QDrawBorderPixmap::OpaqueCenter ? opaqueData : translucentData; + d.sourceLeft = sourceCenterLeft; + d.sourceTop = sourceCenterTop; + d.width = sourceCenterWidth; + d.height = sourceCenterHeight; + d.scaleX = dx / d.width; + d.scaleY = dy / d.height; + + qreal repeatWidth = (xTarget[columns - 1] - xTarget[columns - 2]) / d.scaleX; + qreal repeatHeight = (yTarget[rows - 1] - yTarget[rows - 2]) / d.scaleY; + + for (int j = 1; j < rows - 1; ++j) { + d.y = (0.5 * (yTarget[j + 1] + yTarget[j])); + for (int i = 1; i < columns - 1; ++i) { + d.x = (0.5 * (xTarget[i + 1] + xTarget[i])); + data.append(d); + } + if (rules.horizontal == Qt::RepeatTile) + data[data.size() - 1].width = repeatWidth; + } + if (rules.vertical == Qt::RepeatTile) { + for (int i = 1; i < columns - 1; ++i) + data[data.size() - i].height = repeatHeight; + } + } + + if (opaqueData.size()) + painter->drawPixmapFragments(opaqueData.data(), opaqueData.size(), pixmap, QPainter::OpaqueHint); + if (translucentData.size()) + painter->drawPixmapFragments(translucentData.data(), translucentData.size(), pixmap); + + if (oldAA) + painter->setRenderHint(QPainter::Antialiasing, true); +} + +QT_END_NAMESPACE |