fix: clear DCi icon state when setting other icon types

Fixed an issue where DCi icon state was not properly cleared
when setting other icon types (QIcon, QStyle::StandardPixmap,
DStyle::StandardPixmap). This could cause incorrect icon rendering when
switching between different icon types.

The changes ensure that when setting a non-DCi icon, the DCi icon state
is properly reset to avoid conflicts between different icon systems.
When setting a DCi icon, the QAbstractButton icon is cleared to prevent
interference.

Log: Fixed icon display issues when switching between different icon
types

Influence:
1. Test switching between QIcon, standard pixmap icons, and DCi icons
2. Verify icons display correctly after type changes
3. Test button appearance in different states (normal, hover, pressed)
4. Check icon rendering consistency across different button types

fix: 设置其他图标类型时正确清除 DCi 图标状态

修复了在设置其他图标类型（QIcon、QStyle::StandardPixmap、
DStyle::StandardPixmap）时未正确清除 DCi 图标状态的问题。这可能导致在不
同图标类型之间切换时出现错误的图标渲染。

这些更改确保在设置非 DCi 图标时，DCi 图标状态被正确重置，以避免不同图
标系统之间的冲突。当设置 DCi 图标时，QAbstractButton 图标被清除以防止
干扰。

Log: 修复在不同图标类型之间切换时的图标显示问题

Influence:
1. 测试在 QIcon、标准像素图标和 DCi 图标之间的切换
2. 验证类型更改后图标正确显示
3. 测试按钮在不同状态（正常、悬停、按下）下的外观
4. 检查不同按钮类型之间的图标渲染一致性

PMS: BUG-337027

Author: robertkill

src/widgets/dbuttonbox.cpp

@@ -125,6 +125,7 @@ void DButtonBoxButton::setIcon(const QIcon &icon)
     D_D(DButtonBoxButton);
 
     d->iconType = -1;
+    d->dciIcon = DDciIcon();
     QAbstractButton::setIcon(icon);
 }
 
@@ -140,6 +141,7 @@ void DButtonBoxButton::setIcon(QStyle::StandardPixmap iconType)
     D_D(DButtonBoxButton);
 
     d->iconType = iconType;
+    d->dciIcon = DDciIcon();
     QAbstractButton::setIcon(style()->standardIcon(iconType, nullptr, this));
 }
 
@@ -154,6 +156,7 @@ void DButtonBoxButton::setIcon(DStyle::StandardPixmap iconType)
 {
     D_D(DButtonBoxButton);
 
+    d->dciIcon = DDciIcon();
     d->iconType = iconType;
     QAbstractButton::setIcon(DStyleHelper(style()).standardIcon(iconType, nullptr, this));
 }
@@ -163,6 +166,7 @@ void DButtonBoxButton::setIcon(const DDciIcon &icon)
     D_D(DButtonBoxButton);
 
     d->dciIcon = icon;
+    QAbstractButton::setIcon(QIcon());
 }
 
 DDciIcon DButtonBoxButton::dciIcon() const

src/widgets/diconbutton.cpp

@@ -69,6 +69,7 @@ void DIconButton::setIcon(const QIcon &icon)
 {
     D_D(DIconButton);
 
+    d->dciIcon = DDciIcon();
     d->iconType = -1;
     QAbstractButton::setIcon(icon);
 }
@@ -82,6 +83,7 @@ void DIconButton::setIcon(QStyle::StandardPixmap iconType)
 {
     D_D(DIconButton);
 
+    d->dciIcon = DDciIcon();
     d->iconType = iconType;
     QAbstractButton::setIcon(style()->standardIcon(iconType, nullptr, this));
 }
@@ -95,6 +97,7 @@ void DIconButton::setIcon(DStyle::StandardPixmap iconType)
 {
     D_D(DIconButton);
 
+    d->dciIcon = DDciIcon();
     d->iconType = iconType;
     QAbstractButton::setIcon(DStyleHelper(style()).standardIcon(iconType, nullptr, this));
 }
@@ -105,6 +108,7 @@ void DIconButton::setIcon(const DDciIcon &icon)
 
     d->iconType = -1;
     d->dciIcon = icon;
+    QAbstractButton::setIcon(QIcon());
     this->update();
     this->updateGeometry();
 }