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Code Issues Releases Wiki Activity

Improve key/character event handling, esp. for Unicode entry on Windows.

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This commit is contained in:
BusinessmanProgrammerSteve 2010-05-11 22:10:44 +00:00
parent 26b59b363b
commit 23ed04bc6a
2 changed files with 143 additions and 123 deletions
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262
src/LabelTrack.cpp
View File

@ -1583,35 +1583,19 @@ bool LabelTrack::CaptureKey(wxKeyEvent & event)
{
// Cache the keycode
int keyCode = event.GetKeyCode();
wxChar charCode = keyCode;
#if wxUSE_UNICODE
charCode = event.GetUnicodeKey();
#endif
// Check for modifiers -- this does what wxKeyEvent::HasModifiers() should
// do (it checks Control instead of CMD on Mac)
bool hasMods = event.GetModifiers() & (wxMOD_CMD | wxMOD_ALT);
if (mSelIndex >= 0) {
switch (keyCode)
{
case WXK_BACK:
case WXK_DELETE:
case WXK_HOME:
case WXK_END:
case WXK_LEFT:
case WXK_RIGHT:
case WXK_RETURN:
case WXK_NUMPAD_ENTER:
case WXK_ESCAPE:
case WXK_TAB:
return true;
break;
}
if( IsGoodLabelCharacter(keyCode, charCode) && !event.CmdDown()) {
if (IsGoodLabelEditKey(keyCode) && !hasMods) {
return true;
}
}
else
{
if( IsGoodLabelFirstCharacter(keyCode, charCode) && !event.CmdDown() ){
if( IsGoodLabelFirstKey(keyCode) && !hasMods)
{
AudacityProject * pProj = GetActiveProject();
// If we're playing, don't capture if the selection is the same as the
@ -1630,21 +1614,10 @@ bool LabelTrack::CaptureKey(wxKeyEvent & event)
if( GetLabelIndex( pProj->mViewInfo.sel0, pProj->mViewInfo.sel1) != wxNOT_FOUND )
return false;
// Add a label
SetSelected(true);
AddLabel(pProj->mViewInfo.sel0, pProj->mViewInfo.sel1);
pProj->PushState(_("Added label"), _("Label"));
return true;
}
}
#if 0
if (IsGoodLabelFirstCharacter(keyCode, charCode) && !event.CmdDown()) {
return true;
}
#endif
return false;
}
@ -1656,10 +1629,7 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
// Cache the keycode
int keyCode = event.GetKeyCode();
wxChar charCode = keyCode;
#if wxUSE_UNICODE
charCode = event.GetUnicodeKey();
#endif
int mods = event.GetModifiers();
// All editing keys are only active if we're currently editing a label
if (mSelIndex >= 0) {
@ -1696,6 +1666,7 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
break;
case WXK_DELETE:
case WXK_NUMPAD_DELETE:
{
int len = mLabels[mSelIndex]->title.Length();
@ -1725,59 +1696,86 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
break;
case WXK_HOME:
case WXK_NUMPAD_HOME:
// Move cursor to beginning of label
mCurrentCursorPos = 0;
if (event.ShiftDown()) {
if (mods == wxMOD_SHIFT) {
mCurrentCursorPos = 0;
mDragXPos = 0;
}
else
else if (mods == wxMOD_NONE)
{
mCurrentCursorPos = 0;
mDragXPos = -1;
mInitialCursorPos = mCurrentCursorPos;
}
else {
// Not handled
event.Skip();
}
break;
case WXK_END:
case WXK_NUMPAD_END:
// Move cursor to end of label
mCurrentCursorPos = (int)mLabels[mSelIndex]->title.length();
if (event.ShiftDown()) {
if (mods == wxMOD_SHIFT) {
mCurrentCursorPos = (int)mLabels[mSelIndex]->title.length();
mDragXPos = 0;
}
else
else if (mods == wxMOD_NONE)
{
mCurrentCursorPos = (int)mLabels[mSelIndex]->title.length();
mDragXPos = -1;
mInitialCursorPos = mCurrentCursorPos;
}
else {
// Not handled
event.Skip();
}
break;
case WXK_LEFT:
case WXK_NUMPAD_LEFT:
// Moving cursor left
if (mCurrentCursorPos > 0) {
mCurrentCursorPos--;
if (event.ShiftDown()) {
if (mods == wxMOD_SHIFT) {
if (mCurrentCursorPos > 0) {
mCurrentCursorPos--;
mDragXPos = 0;
}
else
{
}
else if (mods == wxMOD_NONE) {
if (mCurrentCursorPos > 0) {
mCurrentCursorPos--;
mDragXPos = -1;
mInitialCursorPos = mCurrentCursorPos;
}
}
else {
// Not handled
event.Skip();
}
break;
case WXK_RIGHT:
case WXK_NUMPAD_RIGHT:
// Moving cursor right
if (mCurrentCursorPos < (int)mLabels[mSelIndex]->title.length()) {
mCurrentCursorPos++;
if (event.ShiftDown()) {
if (mods == wxMOD_SHIFT) {
if (mCurrentCursorPos < (int)mLabels[mSelIndex]->title.length()) {
mCurrentCursorPos++;
mDragXPos = 0;
}
else
{
}
else if (mods == wxMOD_NONE)
{
if (mCurrentCursorPos < (int)mLabels[mSelIndex]->title.length()) {
mCurrentCursorPos++;
mDragXPos = -1;
mInitialCursorPos = mCurrentCursorPos;
}
}
else {
// Not handled
event.Skip();
}
break;
case WXK_RETURN:
@ -1788,6 +1786,7 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
break;
case WXK_TAB:
case WXK_NUMPAD_TAB:
if (event.ShiftDown()) {
mSelIndex--;
} else {
@ -1815,6 +1814,7 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
switch (keyCode) {
case WXK_TAB:
case WXK_NUMPAD_TAB:
if (!mLabels.IsEmpty()) {
if (event.ShiftDown()) {
mSelIndex = (int)mLabels.Count() - 1;
@ -1841,7 +1841,8 @@ bool LabelTrack::OnKeyDown(double & newSel0, double & newSel1, wxKeyEvent & even
return updated;
}
/// KeyEvent is called for every keypress when over the label track.
/// OnChar is called for incoming characters -- that's any keypress not handled
/// by OnKeyDown.
bool LabelTrack::OnChar(double & newSel0, double & newSel1, wxKeyEvent & event)
{
// Only track true changes to the label
@ -1854,68 +1855,78 @@ bool LabelTrack::OnChar(double & newSel0, double & newSel1, wxKeyEvent & event)
charCode = event.GetUnicodeKey();
#endif
if (mSelIndex >= 0) {
if (IsGoodLabelCharacter(keyCode, charCode)) {
// Test if cursor is in the end of string or not
if (mLabels[mSelIndex]->highlighted) {
RemoveSelectedText();
}
// We still have some filtering to do. Character events can be generated for,
// i.e., the F keys, and if they aren't handled in OnKeyDown() or in the
// command manager we get them here.
if (mCurrentCursorPos < (int)mLabels[mSelIndex]->title.length()) {
// Get substring on the righthand side of cursor
wxString rightPart = mLabels[mSelIndex]->title.Mid(mCurrentCursorPos);
// Set title to substring on the lefthand side of cursor
mLabels[mSelIndex]->title = mLabels[mSelIndex]->title.Left(mCurrentCursorPos);
//append charcode
mLabels[mSelIndex]->title += charCode;
//append the right part substring
mLabels[mSelIndex]->title += rightPart;
}
else
{
//append charCode
mLabels[mSelIndex]->title += charCode;
}
//moving cursor position forward
mCurrentCursorPos++;
mInitialCursorPos = mCurrentCursorPos;
updated = true;
}
else
event.Skip();
}
else //if( !IsGoodLabelFirstCharacter(keyCode, charCode))
{
// Don't automatically start a label unless its one of the accepted
// characters.
// We can always create the label and then type the forbidden character
// as our first character.
// AWD: the following behavior is not really documented (I figured it out by
// entering lots of Unicode characters on various OSes), and it's possible
// that different versions of wxWidgets act differently. It's unfortunately
// the only way I can find to allow input of full Unicode ranges without
// breaking other stuff (Audacity's command manager, keyboard menu
// navigation, Windows' Alt-+-xxxx arbitrary Unicode entry, etc.)
bool bogusChar =
#if defined(__WXMSW__) && wxUSE_UNICODE
// In Windows Unicode builds, these have keyCode not matching charCode
(keyCode != (int)charCode) ||
#else
// In Windows non-unicode, GTK+, and Mac builds the keyCode comes in the
// WXK_* range
(keyCode >= WXK_START && keyCode <= WXK_COMMAND) ||
#endif
// Avoid modified characters, but allow Alt (option) on Mac because
// several legit characters come in with it set.
(event.CmdDown()) ||
#if !defined(__WXMAC__)
(event.AltDown()) ||
#endif
// Avoid control characters on all platforms; Casting to wxUChar to avoid
// assertions in Windows non-Unicode builds...
(wxIscntrl((wxUChar)charCode));
if (bogusChar) {
event.Skip();
return false;
}
// If we've reached this point and aren't currently editing, add new label
if (mSelIndex < 0) {
SetSelected(true);
AudacityProject *p = GetActiveProject();
AddLabel(p->mViewInfo.sel0, p->mViewInfo.sel1);
p->PushState(_("Added label"), _("Label"));
}
//
// Now we are definitely in a label; append the incoming character
//
// Test if cursor is in the end of string or not
if (mLabels[mSelIndex]->highlighted) {
RemoveSelectedText();
}
if (mCurrentCursorPos < (int)mLabels[mSelIndex]->title.length()) {
// Get substring on the righthand side of cursor
wxString rightPart = mLabels[mSelIndex]->title.Mid(mCurrentCursorPos);
// Set title to substring on the lefthand side of cursor
mLabels[mSelIndex]->title = mLabels[mSelIndex]->title.Left(mCurrentCursorPos);
//append charcode
mLabels[mSelIndex]->title += charCode;
//append the right part substring
mLabels[mSelIndex]->title += rightPart;
}
#if 0
else
{
// Create new label
wxString rightPart;
LabelStruct *l = new LabelStruct();
l->t = newSel0;
l->t1 = newSel1;
l->title += wxChar(charCode);
mCurrentCursorPos = 1;
mInitialCursorPos = mCurrentCursorPos;
int len = mLabels.Count();
int pos = 0;
while (pos < len && l->t > mLabels[pos]->t)
pos++;
mLabels.Insert(l, pos);
mSelIndex = pos;
updated = true;
//append charCode
mLabels[mSelIndex]->title += charCode;
}
#endif
//moving cursor position forward
mCurrentCursorPos++;
mInitialCursorPos = mCurrentCursorPos;
updated = true;
// Make sure the caret is visible
mDrawCursor = true;
@ -2595,21 +2606,30 @@ void LabelTrack::CreateCustomGlyphs()
mbGlyphsReady=true;
}
/// The 'typing at selection creates label' feature
/// will only accept these charCodes as a first label
/// character.
bool LabelTrack::IsGoodLabelFirstCharacter(int keyCode, wxChar charCode)
/// Returns true for keys we capture to start a label.
bool LabelTrack::IsGoodLabelFirstKey(int keyCode)
{
// The WXK_DELETE is because Windows doesn't convert DELETE to a proper
// unicode value. (Or at least one we can't use...0x46)
return (keyCode < WXK_START && !wxIscntrl(charCode) && (keyCode != WXK_SPACE) && (keyCode != WXK_DELETE)) ||
keyCode > WXK_COMMAND;
// Allow everything before WXK_START except space and delete, the numpad keys
// when numlock is on, and everything after WXK_COMMAND
return (keyCode < WXK_START
&& keyCode != WXK_SPACE && keyCode != WXK_DELETE) ||
(keyCode >= WXK_NUMPAD0 && keyCode <= WXK_DIVIDE) ||
(keyCode >= WXK_NUMPAD_EQUAL && keyCode <= WXK_NUMPAD_DIVIDE) ||
(keyCode > WXK_COMMAND);
}
/// We'll only accept these characters within a label
bool LabelTrack::IsGoodLabelCharacter(int keyCode, wxChar charCode)
/// This returns true for keys we capture for label editing.
bool LabelTrack::IsGoodLabelEditKey(int keyCode)
{
return (keyCode < WXK_START && !wxIscntrl(charCode)) ||
// Accept everything outside of WXK_START through WXK_COMMAND, plus the keys
// within that range that are usually printable, plus the ones we use for
// keyboard navigation.
return keyCode < WXK_START ||
(keyCode >= WXK_END && keyCode <= WXK_DOWN) ||
(keyCode >= WXK_NUMPAD0 && keyCode <= WXK_DIVIDE) ||
(keyCode >= WXK_NUMPAD_SPACE && keyCode <= WXK_NUMPAD_ENTER) ||
(keyCode >= WXK_NUMPAD_HOME && keyCode <= WXK_NUMPAD_END) ||
(keyCode >= WXK_NUMPAD_DELETE && keyCode <= WXK_NUMPAD_DIVIDE) ||
keyCode > WXK_COMMAND;
}

4
src/LabelTrack.h
View File

@ -79,8 +79,8 @@ class LabelTrack:public Track {
friend class LabelStruct;
public:
bool IsGoodLabelCharacter(int keyCode, wxChar charCode);
bool IsGoodLabelFirstCharacter(int keyCode, wxChar charCode);
bool IsGoodLabelFirstKey(int keyCode);
bool IsGoodLabelEditKey(int keyCode);
bool IsTextSelected();
void CreateCustomGlyphs();