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tdepim/kalarm/lib/spinbox2.cpp

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/*
* spinbox2.cpp - spin box with extra pair of spin buttons (for Qt 3)
* Program: kalarm
* Copyright © 2001-2005,2008 by David Jarvie <djarvie@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <qglobal.h>
#include <stdlib.h>
#include <qstyle.h>
#include <qobjectlist.h>
#include <qapplication.h>
#include <qpixmap.h>
#include <qcursor.h>
#include <qtimer.h>
#include <qwmatrix.h>
#include "spinbox2.moc"
#include "spinbox2private.moc"
/* List of styles which need to display the extra pair of spin buttons as a
* left-to-right mirror image. This is only necessary when, for example, the
* corners of widgets are rounded. For most styles, it is better not to mirror
* the spin widgets so as to keep the normal lighting/shading on either side.
*/
static const char* mirrorStyles[] = {
"PlastikStyle",
0 // list terminator
};
static bool mirrorStyle(const QStyle&);
int SpinBox2::mReverseLayout = -1;
SpinBox2::SpinBox2(QWidget* parent, const char* name)
: QFrame(parent, name),
mReverseWithLayout(true)
{
mUpdown2Frame = new QFrame(this);
mSpinboxFrame = new QFrame(this);
mUpdown2 = new ExtraSpinBox(mUpdown2Frame, "updown2");
// mSpinbox = new MainSpinBox(0, 1, 1, this, mSpinboxFrame);
mSpinbox = new MainSpinBox(this, mSpinboxFrame);
init();
}
SpinBox2::SpinBox2(int minValue, int maxValue, int step, int step2, QWidget* parent, const char* name)
: QFrame(parent, name),
mReverseWithLayout(true)
{
mUpdown2Frame = new QFrame(this);
mSpinboxFrame = new QFrame(this);
mUpdown2 = new ExtraSpinBox(minValue, maxValue, step2, mUpdown2Frame, "updown2");
mSpinbox = new MainSpinBox(minValue, maxValue, step, this, mSpinboxFrame);
setSteps(step, step2);
init();
}
void SpinBox2::init()
{
if (mReverseLayout < 0)
mReverseLayout = QApplication::reverseLayout() ? 1 : 0;
mMinValue = mSpinbox->minValue();
mMaxValue = mSpinbox->maxValue();
mLineStep = mSpinbox->lineStep();
mLineShiftStep = mSpinbox->lineShiftStep();
mPageStep = mUpdown2->lineStep();
mPageShiftStep = mUpdown2->lineShiftStep();
mSpinbox->setSelectOnStep(false); // default
mUpdown2->setSelectOnStep(false); // always false
setFocusProxy(mSpinbox);
mUpdown2->setFocusPolicy(QWidget::NoFocus);
mSpinMirror = new SpinMirror(mUpdown2, mUpdown2Frame, this);
if (!mirrorStyle(style()))
mSpinMirror->hide(); // hide mirrored spin buttons when they are inappropriate
connect(mSpinbox, SIGNAL(valueChanged(int)), SLOT(valueChange()));
connect(mSpinbox, SIGNAL(valueChanged(int)), SIGNAL(valueChanged(int)));
connect(mSpinbox, SIGNAL(valueChanged(const QString&)), SIGNAL(valueChanged(const QString&)));
connect(mUpdown2, SIGNAL(stepped(int)), SLOT(stepPage(int)));
connect(mUpdown2, SIGNAL(styleUpdated()), SLOT(updateMirror()));
}
void SpinBox2::setReadOnly(bool ro)
{
if (static_cast<int>(ro) != static_cast<int>(mSpinbox->isReadOnly()))
{
mSpinbox->setReadOnly(ro);
mUpdown2->setReadOnly(ro);
mSpinMirror->setReadOnly(ro);
}
}
void SpinBox2::setReverseWithLayout(bool reverse)
{
if (reverse != mReverseWithLayout)
{
mReverseWithLayout = reverse;
setSteps(mLineStep, mPageStep);
setShiftSteps(mLineShiftStep, mPageShiftStep);
}
}
void SpinBox2::setEnabled(bool enabled)
{
QFrame::setEnabled(enabled);
updateMirror();
}
void SpinBox2::setWrapping(bool on)
{
mSpinbox->setWrapping(on);
mUpdown2->setWrapping(on);
}
QRect SpinBox2::up2Rect() const
{
return mUpdown2->upRect();
}
QRect SpinBox2::down2Rect() const
{
return mUpdown2->downRect();
}
void SpinBox2::setLineStep(int step)
{
mLineStep = step;
if (reverseButtons())
mUpdown2->setLineStep(step); // reverse layout, but still set the right buttons
else
mSpinbox->setLineStep(step);
}
void SpinBox2::setSteps(int line, int page)
{
mLineStep = line;
mPageStep = page;
if (reverseButtons())
{
mUpdown2->setLineStep(line); // reverse layout, but still set the right buttons
mSpinbox->setLineStep(page);
}
else
{
mSpinbox->setLineStep(line);
mUpdown2->setLineStep(page);
}
}
void SpinBox2::setShiftSteps(int line, int page)
{
mLineShiftStep = line;
mPageShiftStep = page;
if (reverseButtons())
{
mUpdown2->setLineShiftStep(line); // reverse layout, but still set the right buttons
mSpinbox->setLineShiftStep(page);
}
else
{
mSpinbox->setLineShiftStep(line);
mUpdown2->setLineShiftStep(page);
}
}
void SpinBox2::setButtonSymbols(QSpinBox::ButtonSymbols newSymbols)
{
if (mSpinbox->buttonSymbols() == newSymbols)
return;
mSpinbox->setButtonSymbols(newSymbols);
mUpdown2->setButtonSymbols(newSymbols);
}
int SpinBox2::bound(int val) const
{
return (val < mMinValue) ? mMinValue : (val > mMaxValue) ? mMaxValue : val;
}
void SpinBox2::setMinValue(int val)
{
mMinValue = val;
mSpinbox->setMinValue(val);
mUpdown2->setMinValue(val);
}
void SpinBox2::setMaxValue(int val)
{
mMaxValue = val;
mSpinbox->setMaxValue(val);
mUpdown2->setMaxValue(val);
}
void SpinBox2::valueChange()
{
int val = mSpinbox->value();
bool blocked = mUpdown2->signalsBlocked();
mUpdown2->blockSignals(true);
mUpdown2->setValue(val);
mUpdown2->blockSignals(blocked);
}
/******************************************************************************
* Called when the widget is about to be displayed.
* (At construction time, the spin button widths cannot be determined correctly,
* so we need to wait until now to definitively rearrange the widget.)
*/
void SpinBox2::showEvent(QShowEvent*)
{
arrange();
}
QSize SpinBox2::sizeHint() const
{
getMetrics();
QSize size = mSpinbox->sizeHint();
size.setWidth(size.width() - xSpinbox + wUpdown2 + wGap);
return size;
}
QSize SpinBox2::minimumSizeHint() const
{
getMetrics();
QSize size = mSpinbox->minimumSizeHint();
size.setWidth(size.width() - xSpinbox + wUpdown2 + wGap);
return size;
}
void SpinBox2::styleChange(QStyle&)
{
if (mirrorStyle(style()))
mSpinMirror->show(); // show rounded corners with Plastik etc.
else
mSpinMirror->hide(); // keep normal shading with other styles
arrange();
}
/******************************************************************************
* Called when the extra pair of spin buttons has repainted after a style change.
* Updates the mirror image of the spin buttons.
*/
void SpinBox2::updateMirror()
{
mSpinMirror->setNormalButtons(QPixmap::grabWidget(mUpdown2Frame, 0, 0));
}
/******************************************************************************
* Set the positions and sizes of all the child widgets.
*/
void SpinBox2::arrange()
{
getMetrics();
QRect arrowRect = QStyle::visualRect(QRect(0, 0, wUpdown2, height()), this);
mUpdown2Frame->setGeometry(arrowRect);
mUpdown2->setGeometry(-xUpdown2, 0, mUpdown2->width(), height());
mSpinboxFrame->setGeometry(QStyle::visualRect(QRect(wUpdown2 + wGap, 0, width() - wUpdown2 - wGap, height()), this));
mSpinbox->setGeometry(-xSpinbox, 0, mSpinboxFrame->width() + xSpinbox, height());
mSpinMirror->resize(wUpdown2, mUpdown2->height());
mSpinMirror->setGeometry(arrowRect);
//mSpinMirror->setGeometry(QStyle::visualRect(QRect(0, 11, wUpdown2, height()), this));
mSpinMirror->setNormalButtons(QPixmap::grabWidget(mUpdown2Frame, 0, 0));
}
/******************************************************************************
* Calculate the width and position of the extra pair of spin buttons.
* Style-specific adjustments are made for a better appearance.
*/
void SpinBox2::getMetrics() const
{
QRect rect = mUpdown2->style().querySubControlMetrics(QStyle::CC_SpinWidget, mUpdown2, QStyle::SC_SpinWidgetButtonField);
if (style().inherits("PlastikStyle"))
rect.setLeft(rect.left() - 1); // Plastik excludes left border from spin widget rectangle
xUpdown2 = mReverseLayout ? 0 : rect.left();
wUpdown2 = mUpdown2->width() - rect.left();
xSpinbox = mSpinbox->style().querySubControlMetrics(QStyle::CC_SpinWidget, mSpinbox, QStyle::SC_SpinWidgetEditField).left();
wGap = 0;
// Make style-specific adjustments for a better appearance
if (style().inherits("QMotifPlusStyle"))
{
xSpinbox = 0; // show the edit control left border
wGap = 2; // leave a space to the right of the left-hand pair of spin buttons
}
}
/******************************************************************************
* Called when the extra pair of spin buttons is clicked to step the value.
* Normally this is a page step, but with a right-to-left language where the
* button functions are reversed, this is a line step.
*/
void SpinBox2::stepPage(int step)
{
if (abs(step) == mUpdown2->lineStep())
mSpinbox->setValue(mUpdown2->value());
else
{
// It's a shift step
int oldValue = mSpinbox->value();
if (!reverseButtons())
{
// The button pairs have the normal function.
// Page shift stepping - step up or down to a multiple of the
// shift page increment, leaving unchanged the part of the value
// which is the remainder from the page increment.
if (oldValue >= 0)
oldValue -= oldValue % mUpdown2->lineStep();
else
oldValue += (-oldValue) % mUpdown2->lineStep();
}
int adjust = mSpinbox->shiftStepAdjustment(oldValue, step);
if (adjust == -step
&& ((step > 0 && oldValue + step >= mSpinbox->maxValue())
|| (step < 0 && oldValue + step <= mSpinbox->minValue())))
adjust = 0; // allow stepping to the minimum or maximum value
mSpinbox->addValue(adjust + step);
}
bool focus = mSpinbox->selectOnStep() && mUpdown2->hasFocus();
if (focus)
mSpinbox->selectAll();
// Make the covering arrows image show the pressed arrow
mSpinMirror->redraw(QPixmap::grabWidget(mUpdown2Frame, 0, 0));
}
/*=============================================================================
= Class SpinBox2::MainSpinBox
=============================================================================*/
/******************************************************************************
* Return the initial adjustment to the value for a shift step up or down, for
* the main (visible) spin box.
* Normally this is a line step, but with a right-to-left language where the
* button functions are reversed, this is a page step.
*/
int SpinBox2::MainSpinBox::shiftStepAdjustment(int oldValue, int shiftStep)
{
if (owner->reverseButtons())
{
// The button pairs have the opposite function from normal.
// Page shift stepping - step up or down to a multiple of the
// shift page increment, leaving unchanged the part of the value
// which is the remainder from the page increment.
if (oldValue >= 0)
oldValue -= oldValue % lineStep();
else
oldValue += (-oldValue) % lineStep();
}
return SpinBox::shiftStepAdjustment(oldValue, shiftStep);
}
/*=============================================================================
= Class ExtraSpinBox
=============================================================================*/
/******************************************************************************
* Repaint the widget.
* If it's the first time since a style change, tell the parent SpinBox2 to
* update the SpinMirror with the new unpressed button image. We make the
* presumably reasonable assumption that when a style change occurs, the spin
* buttons are unpressed.
*/
void ExtraSpinBox::paintEvent(QPaintEvent* e)
{
SpinBox::paintEvent(e);
if (mNewStylePending)
{
mNewStylePending = false;
emit styleUpdated();
}
}
/*=============================================================================
= Class SpinMirror
=============================================================================*/
SpinMirror::SpinMirror(SpinBox* spinbox, QFrame* spinFrame, QWidget* parent, const char* name)
: QCanvasView(new QCanvas, parent, name),
mSpinbox(spinbox),
mSpinFrame(spinFrame),
mReadOnly(false)
{
setVScrollBarMode(QScrollView::AlwaysOff);
setHScrollBarMode(QScrollView::AlwaysOff);
setFrameStyle(QFrame::NoFrame);
// Find the spin widget which is part of the spin box, in order to
// pass on its shift-button presses.
QObjectList* spinwidgets = spinbox->queryList("QSpinWidget", 0, false, true);
mSpinWidget = (SpinBox*)spinwidgets->getFirst();
delete spinwidgets;
}
void SpinMirror::setNormalButtons(const QPixmap& px)
{
mNormalButtons = px;
redraw(mNormalButtons);
}
void SpinMirror::redraw()
{
redraw(QPixmap::grabWidget(mSpinFrame, 0, 0));
}
void SpinMirror::redraw(const QPixmap& px)
{
QCanvas* c = canvas();
c->setBackgroundPixmap(px);
c->setAllChanged();
c->update();
}
void SpinMirror::resize(int w, int h)
{
canvas()->resize(w, h);
QCanvasView::resize(w, h);
resizeContents(w, h);
setWorldMatrix(QWMatrix(-1, 0, 0, 1, w - 1, 0)); // mirror left to right
}
/******************************************************************************
* Pass on all mouse events to the spinbox which we're covering up.
*/
void SpinMirror::contentsMouseEvent(QMouseEvent* e)
{
if (mReadOnly)
return;
QPoint pt = contentsToViewport(e->pos());
pt.setX(pt.x() + mSpinbox->upRect().left());
QApplication::postEvent(mSpinWidget, new QMouseEvent(e->type(), pt, e->button(), e->state()));
// If the mouse button has been pressed or released, refresh the spin buttons
switch (e->type())
{
case QEvent::MouseButtonPress:
case QEvent::MouseButtonRelease:
QTimer::singleShot(0, this, SLOT(redraw()));
break;
default:
break;
}
}
/******************************************************************************
* Pass on all mouse events to the spinbox which we're covering up.
*/
void SpinMirror::contentsWheelEvent(QWheelEvent* e)
{
if (mReadOnly)
return;
QPoint pt = contentsToViewport(e->pos());
pt.setX(pt.x() + mSpinbox->upRect().left());
QApplication::postEvent(mSpinWidget, new QWheelEvent(pt, e->delta(), e->state(), e->orientation()));
}
/******************************************************************************
* Pass on to the main spinbox events which are needed to activate mouseover and
* other graphic effects when the mouse cursor enters and leaves the widget.
*/
bool SpinMirror::event(QEvent* e)
{
switch (e->type())
{
case QEvent::Leave:
case QEvent::Enter:
QApplication::postEvent(mSpinWidget, new QEvent(e->type()));
QTimer::singleShot(0, this, SLOT(redraw()));
break;
case QEvent::FocusIn:
mSpinbox->setFocus();
QTimer::singleShot(0, this, SLOT(redraw()));
break;
default:
break;
}
return QCanvasView::event(e);
}
/*=============================================================================
= Local functions
=============================================================================*/
/******************************************************************************
* Determine whether the extra pair of spin buttons needs to be mirrored
* left-to-right in the specified style.
*/
static bool mirrorStyle(const QStyle& style)
{
for (const char** s = mirrorStyles; *s; ++s)
if (style.inherits(*s))
return true;
return false;
}