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39 
40 #include <QtGui/qtguiglobal.h>
41 #if QT_CONFIG(accessibility)
42 
43 #include "qwindowsuiavalueprovider.h"
44 #include "qwindowsuiautils.h"
45 #include "qwindowscontext.h"
46 
47 #include <QtGui/qaccessible.h>
48 #include <QtCore/qloggingcategory.h>
49 #include <QtCore/qstring.h>
50 
51 QT_BEGIN_NAMESPACE
52 
53 using namespace QWindowsUiAutomation;
54 
55 
QWindowsUiaValueProvider(QAccessible::Id id)56 QWindowsUiaValueProvider::QWindowsUiaValueProvider(QAccessible::Id id) :
57     QWindowsUiaBaseProvider(id)
58 {
59 }
60 
~QWindowsUiaValueProvider()61 QWindowsUiaValueProvider::~QWindowsUiaValueProvider()
62 {
63 }
64 
65 // Sets the value associated with the control.
SetValue(LPCWSTR val)66 HRESULT STDMETHODCALLTYPE QWindowsUiaValueProvider::SetValue(LPCWSTR val)
67 {
68     qCDebug(lcQpaUiAutomation) << __FUNCTION__;
69 
70     QAccessibleInterface *accessible = accessibleInterface();
71     if (!accessible)
72         return UIA_E_ELEMENTNOTAVAILABLE;
73 
74     // First sets the value as a text.
75     QString strVal = QString::fromUtf16(reinterpret_cast<const ushort *>(val));
76     accessible->setText(QAccessible::Value, strVal);
77 
78     // Then, if the control supports the value interface (range value)
79     // and the supplied text can be converted to a number, and that number
80     // lies within the min/max limits, sets it as the control's current (numeric) value.
81     if (QAccessibleValueInterface *valueInterface = accessible->valueInterface()) {
82         bool ok = false;
83         double numval = strVal.toDouble(&ok);
84         if (ok) {
85             double minimum = valueInterface->minimumValue().toDouble();
86             double maximum = valueInterface->maximumValue().toDouble();
87             if ((numval >= minimum) && (numval <= maximum)) {
88                 valueInterface->setCurrentValue(QVariant(numval));
89             }
90         }
91     }
92     return S_OK;
93 }
94 
95 // True for read-only controls.
get_IsReadOnly(BOOL * pRetVal)96 HRESULT STDMETHODCALLTYPE QWindowsUiaValueProvider::get_IsReadOnly(BOOL *pRetVal)
97 {
98     qCDebug(lcQpaUiAutomation) << __FUNCTION__;
99 
100     if (!pRetVal)
101         return E_INVALIDARG;
102     *pRetVal = FALSE;
103 
104     QAccessibleInterface *accessible = accessibleInterface();
105     if (!accessible)
106         return UIA_E_ELEMENTNOTAVAILABLE;
107 
108     *pRetVal = accessible->state().readOnly;
109     return S_OK;
110 }
111 
112 // Returns the value in text form.
get_Value(BSTR * pRetVal)113 HRESULT STDMETHODCALLTYPE QWindowsUiaValueProvider::get_Value(BSTR *pRetVal)
114 {
115     qCDebug(lcQpaUiAutomation) << __FUNCTION__;
116 
117     if (!pRetVal)
118         return E_INVALIDARG;
119     *pRetVal = nullptr;
120 
121     QAccessibleInterface *accessible = accessibleInterface();
122     if (!accessible)
123         return UIA_E_ELEMENTNOTAVAILABLE;
124 
125     *pRetVal = bStrFromQString(accessible->text(QAccessible::Value));
126     return S_OK;
127 }
128 
129 QT_END_NAMESPACE
130 
131 #endif // QT_CONFIG(accessibility)
132