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<pre class="sourcecodebox">/*
* File: HICustomView_Tester.c of HICustomView_Tester
*
* Contains: A window designed to help write custom HIViews.
*
* Version: 1.0
*
* Created: 2/14/05
*
* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
* ("Apple") in consideration of your agreement to the following terms, and your
* use, installation, modification or redistribution of this Apple software
* constitutes acceptance of these terms. If you do not agree with these terms,
* please do not use, install, modify or redistribute this Apple software.
*
* In consideration of your agreement to abide by the following terms, and subject
* to these terms, Apple grants you a personal, non-exclusive license, under Apple\xCDs
* copyrights in this original Apple software (the "Apple Software"), to use,
* reproduce, modify and redistribute the Apple Software, with or without
* modifications, in source and/or binary forms; provided that if you redistribute
* the Apple Software in its entirety and without modifications, you must retain
* this notice and the following text and disclaimers in all such redistributions of
* the Apple Software. Neither the name, trademarks, service marks or logos of
* Apple Computer, Inc. may be used to endorse or promote products derived from the
* Apple Software without specific prior written permission from Apple. Except as
* expressly stated in this notice, no other rights or licenses, express or implied,
* are granted by Apple herein, including but not limited to any patent rights that
* may be infringed by your derivative works or by other works in which the Apple
* Software may be incorporated.
*
* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
* WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
* COMBINATION WITH YOUR PRODUCTS.
*
* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
* OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright: Copyright © 2005 Apple Computer, Inc, All Rights Reserved
*/
//****************************************************
#pragma mark * compilation directives *
//****************************************************
#pragma mark -
#pragma mark * includes & imports *
#include "HICustomView.h"
#include "HICustomView_Tester.h"
//****************************************************
#pragma mark -
#pragma mark * typedef's, struct's, enums, defines, etc. *
const HIViewID kCustomID = { 'HCst', 100 };
const HIViewID kGroupBoxID = { 'GrpB', 100 };
const HIViewID kSetValue0ID = { 'SV00', 100 };
const HIViewID kSetValue1ID = { 'SV01', 100 };
const HIViewID kSetValue17ID = { 'SV17', 100 };
const HIViewID kSetValue1000ID = { 'SVTH', 100 };
const HIViewID kSetValueEditID = { 'SVET', 100 };
const HIViewID kCheckHiliteID = { 'CHlt', 100 };
const HIViewID kCheckEnableID = { 'CEnb', 100 };
const HIViewID kCheckActiveID = { 'CAct', 100 };
const HIViewID kCheckTestInScrollID = { 'CTiS', 100 };
const HIViewID kCheckTestAsScrollID = { 'CTaS', 100 };
const HIViewID kStaticTextID = { 'Stxt', 100 };
const HILayoutInfo kBindToParentLayout = {
kHILayoutInfoVersionZero,
{ { NULL, kHILayoutBindTop }, { NULL, kHILayoutBindLeft }, { NULL, kHILayoutBindBottom }, { NULL, kHILayoutBindRight } },
{ { NULL, 0.0 }, { NULL, 0.0 } },
{ { NULL, kHILayoutPositionNone }, { NULL, kHILayoutPositionNone } }
};
const HILayoutInfo kNoBindLayout = {
kHILayoutInfoVersionZero,
{ { NULL, kHILayoutBindNone }, { NULL, kHILayoutBindNone }, { NULL, kHILayoutBindNone }, { NULL, kHILayoutBindNone } },
{ { NULL, 0.0 }, { NULL, 0.0 } },
{ { NULL, kHILayoutPositionNone }, { NULL, kHILayoutPositionNone } }
};
//****************************************************
#pragma mark -
#pragma mark * local (static) function prototypes *
static pascal OSStatus Handle_WindowCommandProcess(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
static pascal void MyValidationProc(ControlRef control);
static pascal OSStatus Handle_TextInputEvent(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
static pascal OSStatus Handle_TextShouldChangeInRange(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
static pascal OSStatus UserPaneHandler(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
static pascal OSStatus Handle_ControlValueFieldOrHiliteChanged(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData);
//****************************************************
#pragma mark -
#pragma mark * exported globals *
//****************************************************
#pragma mark -
#pragma mark * local (static) globals *
// window count for the window cascade (see Do_NewWindow)
static UInt32 gWindowCount = 0;
//****************************************************
#pragma mark -
#pragma mark * exported function implementations *
/*****************************************************
*
* Do_NewWindow()
*
* Purpose: called to create a new window that has been constructed with Interface Builder
*
* Inputs: none
*
* Returns: OSStatus - error code (0 == no error)
*/
OSStatus Do_NewWindow(void)
{
OSStatus status;
static IBNibRef gIBNibRef = NULL;
WindowRef aWindowRef = NULL;
CFStringRef theTitle = NULL;
CFMutableStringRef theNewTitle = NULL;
if (gIBNibRef == NULL)
{
// Create a Nib reference passing the name of the nib file (without the .nib extension)
// CreateNibReference only searches into the application bundle.
status = CreateNibReference(CFSTR("main"), &gIBNibRef);
require_noerr(status, CantGetNibRef);
}
require(gIBNibRef != NULL, CantGetNibRef);
// Create a window. "MainWindow" is the name of the window object. This name is set in
// InterfaceBuilder when the nib is created.
status = CreateWindowFromNib(gIBNibRef, CFSTR("MainWindow"), &aWindowRef);
require_noerr(status, CantCreateWindow);
require(NULL != aWindowRef, CantCreateWindow);
// Grab the title of the window and add the window count to it
status = CopyWindowTitleAsCFString(aWindowRef, &theTitle);
require_noerr(status, CantGetSetTitle);
theNewTitle = CFStringCreateMutableCopy(NULL, 0, theTitle);
require(NULL != theNewTitle, CantGetSetTitle);
CFStringAppendFormat(theNewTitle, NULL, CFSTR(" %ld"), ++gWindowCount);
status = SetWindowTitleWithCFString(aWindowRef, theNewTitle);
require_noerr(status, CantGetSetTitle);
// Create the custom view to be tested and embed it in our group box control
HIViewRef groupBox;
status = HIViewFindByID(HIViewGetRoot(aWindowRef), kGroupBoxID, &groupBox);
require_noerr(status, CantFindGroupBox);
require(groupBox != NULL, CantFindGroupBox);
HIViewRef customView;
status = HICreateCustomView(NULL, &customView);
require_noerr(status, CantCreateCustom);
require(customView != NULL, CantCreateCustom);
HIRect groupBoxBounds;
HIViewGetBounds(groupBox, &groupBoxBounds);
groupBoxBounds.origin.x += 20;
groupBoxBounds.origin.y += 34;
groupBoxBounds.size.width -= 40;
groupBoxBounds.size.height -= 54;
HIViewSetFrame(customView, &groupBoxBounds);
HIViewSetLayoutInfo(customView, &kBindToParentLayout);
status = HIViewAddSubview(groupBox, customView);
require_noerr(status, CantAddSubview);
HIViewSetVisible(customView, true);
// Let's react to User's commands.
EventTypeSpec eventTypeCP = {kEventClassCommand, kEventCommandProcess};
status = InstallWindowEventHandler(aWindowRef, Handle_WindowCommandProcess, 1, &eventTypeCP, (void *)customView, NULL);
require_noerr(status, CantInstallEventHandler);
// Let's update our static text field whenever the value or hilite of our tested custom view changes
EventTypeSpec eventTypeCVFC[] =
{
{kEventClassControl, kEventControlValueFieldChanged},
{kEventClassControl, kEventControlHiliteChanged}
};
status = InstallControlEventHandler(customView, Handle_ControlValueFieldOrHiliteChanged, 2, eventTypeCVFC, (void *)customView, NULL);
require_noerr(status, CantInstallEventHandler);
// We accept only numbers in our Edit text control
HIViewRef editText;
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kSetValueEditID, &editText);
#ifdef MAC_OS_X_VERSION_10_4
// in Tiger, only 1 event handler is necessary for the key filtering
EventTypeSpec eventTypeTSCIR = {kEventClassTextField, kEventTextShouldChangeInRange};
status = InstallControlEventHandler(editText, Handle_TextShouldChangeInRange, 1, &eventTypeTSCIR, (void *)editText, NULL);
require_noerr(status, CantInstallEventHandler);
#else
// pre-Tiger, we need a different event handler and a validation proc to handle pastes and drops.
ControlEditTextValidationUPP textValidation = MyValidationProc;
SetControlData(editText, kControlEntireControl, kControlEditTextValidationProcTag, sizeof(textValidation), &textValidation);
EventTypeSpec eventTypeTIUFKE = {kEventClassTextInput, kEventTextInputUnicodeForKeyEvent};
status = InstallControlEventHandler(editText, Handle_TextInputEvent, 1, &eventTypeTIUFKE, (void *)editText, NULL);
require_noerr(status, CantInstallEventHandler);
#endif
// Finishing the custom view setup
SetControl32BitMinimum(customView, 0);
SetControl32BitMaximum(customView, 36);
SetControl32BitValue(customView, 2);
// We want window and thus our custom view to be able to respond to drops
status = SetAutomaticControlDragTrackingEnabledForWindow(aWindowRef, true);
require_noerr(status, SetAutomaticControlDragTrackingEnabledForWindow);
ShowWindow(aWindowRef);
SetWindowModified(aWindowRef, false);
SetAutomaticControlDragTrackingEnabledForWindow:
SetControlDragTrackingEnabled:
CantAddSubview:
CantCreateCustom:
CantFindGroupBox:
CantInstallEventHandler:
CantGetSetTitle:
CantAllocateWindowData:
CantCreateWindow:
CantGetNibRef:
if (theTitle != NULL) CFRelease(theTitle);
if (theNewTitle != NULL) CFRelease(theNewTitle);
return status;
} // Do_NewWindow
//****************************************************
#pragma mark -
#pragma mark * local (static) function implementations *
/*****************************************************
*
* Handle_WindowCommandProcess(inHandlerCallRef, inEvent, inUserData)
*
* Purpose: called to handle of the events generated by the various controls of the HICustomView_Tester window
*
* Inputs: inHandlerCallRef - reference to the current handler call chain
* inEvent - the event
* inUserData - app-specified data you passed in the call to InstallEventHandler
*
* Returns: OSStatus - noErr indicates the event was handled
* eventNotHandledErr indicates the event was not handled and the Toolbox should take over
*/
static pascal OSStatus Handle_WindowCommandProcess(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData)
{
OSStatus status;
HIViewRef customView = (HIViewRef)inUserData;
// getting the command
HICommandExtended aCommand;
status = GetEventParameter(inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(aCommand), NULL, &aCommand);
require_noerr(status, ExitCommandProcess);
status = eventNotHandledErr;
// cheking that the command came from a control
if ( ! (aCommand.attributes & kHICommandFromControl) ) goto ExitCommandProcess;
switch (aCommand.commandID)
{
//
// Asking for a refresh of the custom view
//
case 'SNDt':
HIViewSetNeedsDisplay(customView, true);
status = noErr;
break;
//
// Setting the control value of the custom view
//
case 'SV00':
SetControl32BitValue(customView, 0);
status = noErr;
break;
case 'SV01':
SetControl32BitValue(customView, 1);
status = noErr;
break;
case 'SV17':
SetControl32BitValue(customView, 17);
status = noErr;
break;
case 'SVTH':
SetControl32BitValue(customView, 1000);
status = noErr;
break;
case 'SVet':
{
HIViewRef editText;
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kSetValueEditID, &editText);
char buffer[11];
Size actualSize;
GetControlData(editText, kControlEntireControl, kControlEditTextTextTag, 10, buffer, &actualSize);
if (actualSize > 10) actualSize = 10;
buffer[actualSize] = 0;
SetControl32BitValue(customView, atoi(buffer));
}
status = noErr;
break;
//
// Setting the state of the custom view
//
case 'CHlt':
// setting the hilite to non-0 also stomps the previous hilite state if any
// and we don't want that in our testing
if (GetControl32BitValue(aCommand.source.control) == 1)
HiliteControl(customView, 1);
else
HiliteControl(customView, 0);
status = noErr;
break;
case 'CEnb':
{
HIViewRef hiliteControl;
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckHiliteID, &hiliteControl);
if (GetControl32BitValue(aCommand.source.control) == 1)
EnableControl(customView);
else
DisableControl(customView);
UInt16 prevHilite = GetControlHilite(customView);
if ((prevHilite == kControlInactivePart) || (prevHilite == kControlDisabledPart))
DisableControl(hiliteControl);
else
EnableControl(hiliteControl);
HIViewSetNeedsDisplay(customView, true);
}
status = noErr;
break;
case 'CAct':
{
HIViewRef hiliteControl;
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckHiliteID, &hiliteControl);
if (GetControl32BitValue(aCommand.source.control) == 1)
ActivateControl(customView);
else
DeactivateControl(customView);
UInt16 prevHilite = GetControlHilite(customView);
if ((prevHilite == kControlInactivePart) || (prevHilite == kControlDisabledPart))
DisableControl(hiliteControl);
else
EnableControl(hiliteControl);
HIViewSetNeedsDisplay(customView, true);
}
status = noErr;
break;
//
// Testing the custom view in or as a scroller in a HIScrollView
//
case 'CTiS':
case 'CTaS':
if (GetControl32BitValue(aCommand.source.control) == 1)
{
// create a HIScrollView and install it where and as the custom view was
HIViewRef scrollView;
status = HIScrollViewCreate(kHIScrollViewValidOptions, &scrollView);
require_noerr(status, ExitCommandProcess);
HIRect frame;
status = HIViewGetFrame(customView, &frame);
require_noerr(status, ExitCommandProcess);
status = HIViewSetFrame(scrollView, &frame);
require_noerr(status, ExitCommandProcess);
HIViewSetLayoutInfo(scrollView, &kBindToParentLayout);
HIViewSetLayoutInfo(customView, &kNoBindLayout);
status = HIViewAddSubview(HIViewGetSuperview(customView), scrollView);
require_noerr(status, ExitCommandProcess);
if (aCommand.commandID == 'CTiS')
{
// if we are testing the custom view in a scroller, we embed it in a scrolling User Pane
// that we embed in the HIScrollView
Rect boundsRect = {0, 0, 1000, 1000};
HIViewRef userPane;
status = CreateUserPaneControl(NULL, &boundsRect, kControlSupportsEmbedding, &userPane);
require_noerr(status, ExitCommandProcess);
EventTypeSpec userPaneEvents[] =
{
{kEventClassScrollable, kEventScrollableGetInfo},
{kEventClassScrollable, kEventScrollableScrollTo}
};
InstallControlEventHandler(userPane, UserPaneHandler, 2, userPaneEvents, userPane, NULL);
status = HIViewAddSubview(scrollView, userPane);
require_noerr(status, ExitCommandProcess);
status = HIViewAddSubview(userPane, customView);
require_noerr(status, ExitCommandProcess);
HIViewSetVisible(userPane, true);
}
else
{
// else we just embed the custom view directly in the HIScrollView
status = HIViewAddSubview(scrollView, customView);
require_noerr(status, ExitCommandProcess);
}
HIViewSetVisible(scrollView, true);
// the 2 modes are not compatible so we disable the other check box
HIViewRef otherCheckToDisable;
if (aCommand.commandID == 'CTiS')
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckTestAsScrollID, &otherCheckToDisable);
else
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckTestInScrollID, &otherCheckToDisable);
require_noerr(status, ExitCommandProcess);
DisableControl(otherCheckToDisable);
// if we reach here, status is already set to noErr so we don't set it again
}
else
{
// we remove the HIScrollView and set the custom view back to where and as it was
HIViewRef scrollView;
if (aCommand.commandID == 'CTiS')
scrollView = HIViewGetSuperview(HIViewGetSuperview(customView));
else
scrollView = HIViewGetSuperview(customView);
status = HIViewAddSubview(HIViewGetSuperview(scrollView), customView);
require_noerr(status, ExitCommandProcess);
HIRect frame;
status = HIViewGetFrame(scrollView, &frame);
require_noerr(status, ExitCommandProcess);
status = HIViewSetFrame(customView, &frame);
require_noerr(status, ExitCommandProcess);
HIViewSetLayoutInfo(customView, &kBindToParentLayout);
// by releasing the HIScrollView, we also release the scrolling User Pane if any
// which was embedded inside
CFRelease(scrollView);
// we renable the other check box
HIViewRef otherCheckToEnable;
if (aCommand.commandID == 'CTiS')
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckTestAsScrollID, &otherCheckToEnable);
else
HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kCheckTestInScrollID, &otherCheckToEnable);
require_noerr(status, ExitCommandProcess);
EnableControl(otherCheckToEnable);
// if we reach here, status is already set to noErr so we don't set it again
}
break;
}
ExitCommandProcess:
return status;
} // Handle_WindowCommandProcess
/*****************************************************
*
* UserPaneHandler(inHandlerCallRef, inEvent, inUserData)
*
* Purpose: called to handle the UserPane used as an embedder in the HIScrollView
*
* Inputs: inHandlerCallRef - reference to the current handler call chain
* inEvent - the event
* inUserData - app-specified data you passed in the call to InstallEventHandler
*
* Returns: OSStatus - noErr indicates the event was handled
* eventNotHandledErr indicates the event was not handled and the Toolbox should take over
*/
static pascal OSStatus UserPaneHandler(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void * inUserData)
{
OSStatus status = eventNotHandledErr;
HIViewRef userPane = (HIViewRef)inUserData;
HIRect bounds;
HIViewGetBounds(userPane, &bounds);
// the following is a very straightforward simple yet complete implementation of the
// kEventClassScrollable protocol which is enough to make the User Pane scrolls along its embedded content
switch (GetEventKind(inEvent))
{
#pragma mark * kEventScrollableGetInfo
case kEventScrollableGetInfo:
{
// we're being asked to return information about the scrolled view that we set as Event Parameters
HISize lineSize = { 1, 1 }, imageSize = {3000, 2000};
SetEventParameter(inEvent, kEventParamViewSize, typeHISize, sizeof(bounds.size), &bounds.size);
SetEventParameter(inEvent, kEventParamImageSize, typeHISize, sizeof(imageSize), &imageSize);
SetEventParameter(inEvent, kEventParamLineSize, typeHISize, sizeof(lineSize), &lineSize);
SetEventParameter(inEvent, kEventParamOrigin, typeHIPoint, sizeof(bounds.origin), &bounds.origin);
status = noErr;
break;
}
#pragma mark * kEventScrollableScrollTo
case kEventScrollableScrollTo:
{
// we're being asked to scroll, we just do a sanity check and ask for a redraw if the location is different
HIPoint where;
GetEventParameter(inEvent, kEventParamOrigin, typeHIPoint, NULL, sizeof(where), NULL, &where);
if ((bounds.origin.y != where.y) || (bounds.origin.x != where.x))
{
HIViewSetBoundsOrigin(userPane, where.x, where.y);
HIViewSetNeedsDisplay(userPane, true);
}
status = noErr;
break;
}
}
} // UserPaneHandler
/*****************************************************
*
* MyValidationProc(theControl)
*
* Purpose: called when a key filter can't be: after cut, paste, etc
*
* Inputs: theControl - the control to validate
*
* Returns: none
*/
static pascal void MyValidationProc(ControlRef theControl)
{
OSStatus status;
CFStringRef theCFString = NULL;
UniChar *buffer = NULL;
// Getting the text content of the control
status = GetControlData(theControl, kControlEntireControl, kControlEditTextCFStringTag, sizeof(theCFString), &theCFString, NULL);
require_noerr(status, ExitValidation);
require(theCFString != NULL, ExitValidation);
CFIndex i, j, len = CFStringGetLength(theCFString);
if (len == 0) goto ExitValidation; // there's nothing to validate
// Grabbing the characters as Unicode chars
buffer = (UniChar *)malloc(len * sizeof(UniChar));
require(buffer != NULL, ExitValidation);
// Checking to see if we have only digits
CFStringGetCharacters(theCFString, CFRangeMake(0, len), buffer);
Boolean ok = true;
for (i = 0; (i < len) && ok; i++)
ok = (buffer[i] >= '0') && (buffer[i] <= '9');
if (!ok)
{
// if not, we remove the offending characters
// we also make sure that we restore the insertion point to the correct location.
ControlEditTextSelectionRec textSelection;
status = GetControlData(theControl, kControlEntireControl, kControlEditTextSelectionTag, sizeof(textSelection), &textSelection, NULL);
require_noerr(status, ExitValidation);
for (i = 0, j = 0; i < len; i++)
if ((buffer[i] >= '0') && (buffer[i] <= '9')) buffer[j++] = buffer[i];
CFRelease(theCFString);
theCFString = CFStringCreateWithCharacters(NULL, buffer, j);
require(theCFString != NULL, ExitValidation);
status = SetControlData(theControl, kControlEntireControl, kControlEditTextCFStringTag, sizeof(theCFString), &theCFString);
require_noerr(status, ExitValidation);
textSelection.selEnd -= (len - j); textSelection.selStart = textSelection.selEnd;
status = SetControlData(theControl, kControlEntireControl, kControlEditTextSelectionTag, sizeof(textSelection), &textSelection);
require_noerr(status, ExitValidation);
}
ExitValidation:
if (buffer != NULL) free(buffer);
if (theCFString != NULL) CFRelease(theCFString);
return;
} // MyValidationProc
/*****************************************************
*
* Handle_TextInputEvent(inHandlerCallRef, inEvent, inUserData)
*
* Purpose: called to intercept keystrokes which are destined for a control
*
* Inputs: inHandlerCallRef - reference to the current handler call chain
* inEvent - the event
* inUserData - app-specified data you passed in the call to InstallEventHandler
*
* Returns: OSStatus - noErr indicates the event was handled
* eventNotHandledErr indicates the event was not handled and the Toolbox should take over
*/
static pascal OSStatus Handle_TextInputEvent(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData)
{
OSStatus status;
UniChar ch = 0;
status = GetEventParameter(inEvent, kEventParamTextInputSendText, typeUnicodeText, NULL, sizeof(ch), NULL, &ch);
require_noerr(status, ExitTextInput);
if ((ch == kReturnCharCode) || (ch == kEnterCharCode))
{
//
// we got return or enter so we validate the edit text control by sending a command
//
EventRef theEvent;
CreateEvent(NULL, kEventClassCommand, kEventCommandProcess, GetCurrentEventTime(), kEventAttributeUserEvent, &theEvent);
HICommandExtended theCommand;
theCommand.attributes = kHICommandFromControl;
theCommand.commandID = 'SVet';
theCommand.source.control = (ControlRef)inUserData;
SetEventParameter(theEvent, kEventParamDirectObject, typeHICommand, sizeof(theCommand), &theCommand);
SendEventToEventTarget(theEvent, GetWindowEventTarget(GetControlOwner((ControlRef)inUserData)));
ReleaseEvent(theEvent);
status = noErr;
}
if ( ((ch >= '0') && (ch <= '9')) ||
(ch == kBackspaceCharCode) ||
(ch == kLeftArrowCharCode) ||
(ch == kRightArrowCharCode) ||
(ch == kUpArrowCharCode) ||
(ch == kDownArrowCharCode) )
status = eventNotHandledErr;
else
status = noErr;
ExitTextInput:
return status;
} // Handle_TextInputEvent
/*****************************************************
*
* Handle_TextShouldChangeInRange(inHandlerCallRef, inEvent, inUserData)
*
* Purpose: called to intercept text changes which are destined for a text control
*
* Inputs: inHandlerCallRef - reference to the current handler call chain
* inEvent - the event
* inUserData - app-specified data you passed in the call to InstallEventHandler
*
* Returns: OSStatus - noErr indicates the event was handled
* eventNotHandledErr indicates the event was not handled and the Toolbox should take over
*/
static pascal OSStatus Handle_TextShouldChangeInRange(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData)
{
OSStatus status;
CFStringRef theCFString = NULL;
status = GetEventParameter(inEvent, kEventParamCandidateText, typeCFStringRef, NULL, sizeof(theCFString), NULL, &theCFString);
require_noerr(status, ExitShouldChange);
require_action(theCFString != NULL, ExitShouldChange, status = userCanceledErr);
UniChar *buffer = NULL;
CFIndex i, j, len = CFStringGetLength(theCFString);
if (len == 0) goto ExitShouldChange; // there's nothing to filter
// Grabbing the characters as Unicode chars
buffer = (UniChar *)malloc(len * sizeof(UniChar));
require(buffer != NULL, ExitShouldChange);
CFStringGetCharacters(theCFString, CFRangeMake(0, len), buffer);
// Checking if we just have the return code
if ((len == 1) && (buffer[0] == kReturnCharCode))
{
EventRef theEvent;
CreateEvent(NULL, kEventClassCommand, kEventCommandProcess, GetCurrentEventTime(), kEventAttributeUserEvent, &theEvent);
HICommandExtended theCommand;
theCommand.attributes = kHICommandFromControl;
theCommand.commandID = 'SVet';
theCommand.source.control = (ControlRef)inUserData;
SetEventParameter(theEvent, kEventParamDirectObject, typeHICommand, sizeof(theCommand), &theCommand);
SendEventToEventTarget(theEvent, GetWindowEventTarget(GetControlOwner((ControlRef)inUserData)));
ReleaseEvent(theEvent);
// we don't want the return character to be added to the text so we abort the input
status = userCanceledErr;
}
else
{
// Checking to see if we have only digits
Boolean ok = true;
for (i = 0; (i < len) && ok; i++)
ok = (buffer[i] >= '0') && (buffer[i] <= '9');
if (!ok)
{
// if not, we remove the offending characters
for (i = 0, j = 0; i < len; i++)
if ((buffer[i] >= '0') && (buffer[i] <= '9')) buffer[j++] = buffer[i];
if (j == 0)
// not a single digit in the candidate text, we abort the inout
status = userCanceledErr;
else
{
theCFString = CFStringCreateWithCharacters(NULL, buffer, j);
require_action(theCFString != NULL, ExitShouldChange, status = userCanceledErr);
status = SetEventParameter(inEvent, kEventParamReplacementText, typeCFStringRef, sizeof(theCFString), &theCFString);
require_noerr(status, ExitShouldChange);
// if we reach here, status is already set to noErr so we don't set it again
}
}
else
// only digits, we just let the HIToolbox do its job
status = eventNotHandledErr;
}
ExitShouldChange:
if (buffer != NULL) free(buffer);
return status;
} // Handle_TextShouldChangeInRange
/*****************************************************
*
* Handle_ControlValueFieldOrHiliteChanged(inHandlerCallRef, inEvent, inUserData)
*
* Purpose: called to handle the change of the value or hilite of our custom view, we update the static text field
*
* Inputs: inHandlerCallRef - reference to the current handler call chain
* inEvent - the event
* inUserData - app-specified data you passed in the call to InstallEventHandler
*
* Returns: OSStatus - noErr indicates the event was handled
* eventNotHandledErr indicates the event was not handled and the Toolbox should take over
*/
static pascal OSStatus Handle_ControlValueFieldOrHiliteChanged(EventHandlerCallRef inHandlerCallRef, EventRef inEvent, void *inUserData)
{
OSStatus status;
HIViewRef customView = (HIViewRef)inUserData;
// Finding our static text control
HIViewRef statText;
status = HIViewFindByID(HIViewGetRoot(GetControlOwner(customView)), kStaticTextID, &statText);
require_noerr(status, ExitValueFieldChanged);
// Grabbing the fields that we are interested in
CFStringRef theCFString = CFStringCreateWithFormat(NULL, NULL, CFSTR("Value: %ld, Min: %ld, Max: %ld, Hilite: %d"), GetControl32BitValue(customView), GetControl32BitMinimum(customView), GetControl32BitMaximum(customView), GetControlHilite(customView));
require(theCFString != NULL, ExitValueFieldChanged);
// Setting the text in the control
#ifdef MAC_OS_X_VERSION_10_4
status = HIViewSetText(statText, theCFString);
#else
status = SetControlData(statText, kControlEntireControl, kControlStaticTextCFStringTag, sizeof(theCFString), &theCFString);
#endif
require_noerr(status, ExitValueFieldChanged);
CFRelease(theCFString);
ExitValueFieldChanged:
if (status == noErr) status = eventNotHandledErr;
return status;
} // Handle_ControlValueFieldOrHiliteChanged
</pre>
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