Rounding and orange-red playhead

[ddennedy]

This pull request introduces a series of UI refinements to improve the visual consistency and polish of the application, focusing on rounded corners, highlight styling, and a unified playhead color. The changes affect both C++ and QML code, ensuring that various UI elements—such as timeline clips, toolbars, and dialog frames—have a more modern and cohesive appearance.

UI Styling Enhancements:

• Timeline clips in Clip.qml now feature rounded corners on their left and right sides when adjacent to blank clips, with all internal elements (waveforms, labels, overlays) adjusting their margins and rendering to respect these corners. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
• Highlighted widgets and tool buttons now consistently use a border radius and padding, with stylesheet-based highlight colors applied for a bolder, more modern look across toolbars and dialogs. [1] [2] [3] [4]

Playhead Color Unification:

• The playhead (timeline cursor) color is now defined in one place (QmlApplication::playheadColor, a bold red) and used consistently in the timeline, keyframes, and scrub bar, replacing palette-based colors for a more distinctive and unified appearance. [1] [2] [3] [4] [5] [6] [7] [8] [9]

Waveform Rendering Improvements:

• The waveform outline is now drawn only along the peaks (not the bottom edge), preventing dark lines from conflicting with the rounded corners of clips and improving visual clarity. [1] [2]

Other Visual Tweaks:

• Filter view highlights and text in QML now have rounded corners and padding for better aesthetics and readability. [1] [2]
• The copyright notice in statuslabelwidget.cpp has been updated.

These changes collectively modernize the application's look and feel, enhance consistency, and address subtle UI details for a more polished user experience.

[Copilot]

Pull request overview

This PR refines Shotcut’s UI styling to improve visual consistency across Qt widgets and QML views, including rounded corners, highlight styling, and a single shared playhead color used in both QML and C++ rendering.

Changes:

• Centralize the playhead/cursor color via QmlApplication::playheadColor and use it in the scrub bar, timeline, and keyframes.
• Add rounded-corner handling to timeline clips (including margin/layout adjustments for thumbnails, labels, and waveforms) and tweak filter view highlight styling.
• Adjust waveform drawing to avoid stroking the bottom closing edge to better match rounded clip corners.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/widgets/statuslabelwidget.cpp	Applies highlight-style visuals to the status label widget.
src/widgets/newprojectfolder.cpp	Updates “New Project” frames/labels highlight styling via stylesheets.
src/util.cpp	Enhances highlight styling helper with padding and rounded corners.
src/scrubbar.cpp	Uses the unified playhead color when painting the scrub bar playhead.
src/qmltypes/timelineitems.cpp	Uses unified playhead color; refines waveform stroke to outline peaks only.
src/qmltypes/qmlapplication.h	Introduces playheadColor Q_PROPERTY and accessor for consistent playhead color.
src/qml/views/timeline/timeline.qml	Switches timeline cursor color to the unified playhead color.
src/qml/views/timeline/Clip.qml	Adds conditional rounded corners and adjusts internal layout to respect them.
src/qml/views/keyframes/keyframes.qml	Switches keyframes cursor color to the unified playhead color.
src/qml/views/filter/filterview.qml	Adds rounding and padding to filter highlight elements.
src/mainwindow.cpp	Adds consistent rounded/checked styling to layout switcher tool buttons.