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Update bitmap shown by the buttons in wxMSW on DPI change

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Recreate wxImageList used for the bitmaps internally with the bitmaps of
the size corresponding to the new DPI.

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This commit is contained in:
Vadim Zeitlin 2021-10-17 01:02:08 +01:00
parent 4e5d2d97e2
commit 2a0719818a
1 changed files with 72 additions and 41 deletions
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113
src/msw/anybutton.cpp
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@ -105,9 +105,10 @@ extern wxWindowMSW *wxWindowBeingErased; // From src/msw/window.cpp
class wxButtonImageData: public wxObject
{
public:
explicit wxButtonImageData(const wxSize& bitmapSize)
: m_bitmapSize(bitmapSize)
explicit wxButtonImageData(const wxBitmapBundle& normalBundle)
: m_bitmapSize(normalBundle.GetDefaultSize())
{
m_bitmapBundles[wxAnyButton::State_Normal] = normalBundle;
}
virtual ~wxButtonImageData() { }
@ -158,7 +159,7 @@ public:
virtual wxDirection GetBitmapPosition() const = 0;
virtual void SetBitmapPosition(wxDirection dir) = 0;
private:
protected:
wxSize m_bitmapSize;
wxBitmapBundle m_bitmapBundles[wxAnyButton::State_Max];
@ -177,9 +178,10 @@ class wxODButtonImageData : public wxButtonImageData
{
public:
wxODButtonImageData(wxAnyButton *btn, const wxBitmapBundle& bitmapBundle)
: wxButtonImageData(bitmapBundle.GetDefaultSize())
: wxButtonImageData(bitmapBundle)
{
SetBitmapBundle(bitmapBundle, wxAnyButton::State_Normal);
SetBitmap(GetBitmapFromBundle(bitmapBundle),
wxAnyButton::State_Normal);
#if wxUSE_IMAGE
SetBitmap(GetBitmapFromBundle(bitmapBundle).ConvertToDisabled(),
wxAnyButton::State_Disabled);
@ -250,44 +252,10 @@ public:
// we must be constructed with the size of our images as we need to create
// the image list
wxXPButtonImageData(wxAnyButton *btn, const wxBitmapBundle& bitmapBundle)
: wxButtonImageData(bitmapBundle.GetDefaultSize()),
: wxButtonImageData(bitmapBundle),
m_hwndBtn(GetHwndOf(btn))
{
// initialize all bitmaps except for the disabled one to normal state
const wxBitmap bitmap = bitmapBundle.GetBitmap(wxDefaultSize);
m_iml.Create
(
bitmap.GetWidth(),
bitmap.GetHeight(),
!bitmap.HasAlpha() /* use mask only if no alpha */,
wxAnyButton::State_Max + 1 /* see "pulse" comment below */
);
for ( int n = 0; n < wxAnyButton::State_Max; n++ )
{
#if wxUSE_IMAGE
m_iml.Add(n == wxAnyButton::State_Disabled ? bitmap.ConvertToDisabled()
: bitmap);
#else
m_iml.Add(bitmap);
#endif
}
// In addition to the states supported by wxWidgets such as normal,
// hot, pressed, disabled and focused, we need to add bitmap for
// another state when running under Windows 7 -- the so called "stylus
// hot" state corresponding to PBS_STYLUSHOT constant. While it's
// documented in MSDN as being only used with tablets, it is a lie as
// a focused button actually alternates between the image list elements
// with PBS_DEFAULTED and PBS_STYLUSHOT indices and, in particular,
// just disappears during half of the time if the latter is not set so
// we absolutely must set it.
//
// This also explains why we need to allocate an extra slot when creating
// the image list above, the slot State_Max is used for this one.
m_iml.Add(bitmap);
m_data.himl = GetHimagelistOf(&m_iml);
InitImageList();
// no margins by default
::SetRectEmpty(&m_data.margin);
@ -296,6 +264,9 @@ public:
m_data.uAlign = BUTTON_IMAGELIST_ALIGN_LEFT;
UpdateImageInfo();
// React to DPI changes in the future.
btn->Bind(wxEVT_DPI_CHANGED, &wxXPButtonImageData::OnDPIChanged, this);
}
virtual wxBitmap GetBitmap(wxAnyButton::State which) const wxOVERRIDE
@ -383,6 +354,52 @@ public:
}
private:
void InitImageList()
{
const wxBitmap
bitmap = m_bitmapBundles[wxAnyButton::State_Normal].GetBitmap(m_bitmapSize);
m_iml.Create
(
bitmap.GetWidth(),
bitmap.GetHeight(),
!bitmap.HasAlpha() /* use mask only if no alpha */,
wxAnyButton::State_Max + 1 /* see "pulse" comment below */
);
m_data.himl = GetHimagelistOf(&m_iml);
for ( int n = 0; n < wxAnyButton::State_Max; n++ )
{
wxBitmap stateBitmap = m_bitmapBundles[n].GetBitmap(m_bitmapSize);
if ( !stateBitmap.IsOk() )
{
#if wxUSE_IMAGE
if ( n == wxAnyButton::State_Disabled )
stateBitmap = bitmap.ConvertToDisabled();
else
#endif // wxUSE_IMAGE
stateBitmap = bitmap;
}
m_iml.Add(bitmap);
}
// In addition to the states supported by wxWidgets such as normal,
// hot, pressed, disabled and focused, we need to add bitmap for
// another state when running under Windows 7 -- the so called "stylus
// hot" state corresponding to PBS_STYLUSHOT constant. While it's
// documented in MSDN as being only used with tablets, it is a lie as
// a focused button actually alternates between the image list elements
// with PBS_DEFAULTED and PBS_STYLUSHOT indices and, in particular,
// just disappears during half of the time if the latter is not set so
// we absolutely must set it.
//
// This also explains why we need to allocate an extra slot when creating
// the image list above, the slot State_Max is used for this one.
m_iml.Add(bitmap);
}
void UpdateImageInfo()
{
if ( !::SendMessage(m_hwndBtn, BCM_SETIMAGELIST, 0, (LPARAM)&m_data) )
@ -391,6 +408,20 @@ private:
}
}
void OnDPIChanged(wxDPIChangedEvent& event)
{
event.Skip();
// We need to recreate the image list using the new size and re-add all
// bitmaps to it.
m_bitmapSize = event.Scale(m_bitmapSize);
m_iml.Destroy();
InitImageList();
UpdateImageInfo();
}
// we store image list separately to be able to use convenient wxImageList
// methods instead of working with raw HIMAGELIST
wxImageList m_iml;