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39#include "qaccessiblebridgeutils_p.h"
40#include <QtCore/qmath.h>
41
42QT_BEGIN_NAMESPACE
43
44namespace QAccessibleBridgeUtils {
45
46static bool performAction(QAccessibleInterface *iface, const QString &actionName)
47{
48 if (QAccessibleActionInterface *actionIface = iface->actionInterface()) {
49 if (actionIface->actionNames().contains(actionName)) {
50 actionIface->doAction(actionName);
51 return true;
52 }
53 }
54 return false;
55}
56
57QStringList effectiveActionNames(QAccessibleInterface *iface)
58{
59 QStringList actions;
60 if (QAccessibleActionInterface *actionIface = iface->actionInterface())
61 actions = actionIface->actionNames();
62
63 if (iface->valueInterface()) {
64 if (!actions.contains(QAccessibleActionInterface::increaseAction()))
65 actions << QAccessibleActionInterface::increaseAction();
66 if (!actions.contains(QAccessibleActionInterface::decreaseAction()))
67 actions << QAccessibleActionInterface::decreaseAction();
68 }
69 return actions;
70}
71
72bool performEffectiveAction(QAccessibleInterface *iface, const QString &actionName)
73{
74 if (!iface)
75 return false;
76 if (performAction(iface, actionName))
77 return true;
78 if (actionName != QAccessibleActionInterface::increaseAction()
79 && actionName != QAccessibleActionInterface::decreaseAction())
80 return false;
81
82 QAccessibleValueInterface *valueIface = iface->valueInterface();
83 if (!valueIface)
84 return false;
85 bool success;
86 const QVariant currentVariant = valueIface->currentValue();
87 double stepSize = valueIface->minimumStepSize().toDouble(&success);
88 if (!success || qFuzzyIsNull(stepSize)) {
89 const double min = valueIface->minimumValue().toDouble(&success);
90 if (!success)
91 return false;
92 const double max = valueIface->maximumValue().toDouble(&success);
93 if (!success)
94 return false;
95 stepSize = (max - min) / 10; // this is pretty arbitrary, we just need to provide something
96 const int typ = currentVariant.userType();
97 if (typ != QMetaType::Float && typ != QMetaType::Double) {
98 // currentValue is an integer. Round it up to ensure stepping in case it was below 1
99 stepSize = qCeil(stepSize);
100 }
101 }
102 const double current = currentVariant.toDouble(&success);
103 if (!success)
104 return false;
105 if (actionName == QAccessibleActionInterface::decreaseAction())
106 stepSize = -stepSize;
107 valueIface->setCurrentValue(current + stepSize);
108 return true;
109}
110
111} //namespace
112
113QT_END_NAMESPACE
114