fix: Fixed display issues when switching taskbar positions #1400
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[APPROVALNOTIFIER] This PR is NOT APPROVED This pull-request has been approved by: Ivy233 The full list of commands accepted by this bot can be found here. DetailsNeeds approval from an approver in each of these files:Approvers can indicate their approval by writing |
Reviewer's GuideRefines the dock’s position-change handling by decoupling menu actions from animation callbacks and introducing a robust, state-driven animation flow that hides the dock at the old position, switches logical position, and then shows it at the new position without visual glitches. Sequence diagram for dock position change animation flowsequenceDiagram
actor User
participant MenuItem
participant Applet
participant Panel
participant positionChangeConnections
participant dockAnimation
participant dock
participant hideShowAnimation
User->>MenuItem: select new position value
MenuItem->>Applet: set position value
Applet->>Panel: update position
Panel-->>positionChangeConnections: onPositionChanged
activate positionChangeConnections
positionChangeConnections->>positionChangeConnections: check isRestoringPosition
alt isRestoringPosition true
positionChangeConnections-->>positionChangeConnections: return (ignore change)
else isRestoringPosition false
positionChangeConnections->>positionChangeConnections: savedNewPosition = Panel.position
positionChangeConnections->>positionChangeConnections: isRestoringPosition = true
positionChangeConnections->>Applet: position = previousPosition
positionChangeConnections->>positionChangeConnections: isRestoringPosition = false
positionChangeConnections->>dockAnimation: stop
positionChangeConnections->>hideShowAnimation: stop
positionChangeConnections->>dockAnimation: isPositionChanging = true
positionChangeConnections->>Panel: read hideState
positionChangeConnections->>dock: read visible
alt Panel.hideState is Hide and dock not visible
positionChangeConnections->>dockAnimation: isPositionChanging = false
positionChangeConnections->>positionChangeConnections: handlePositionChangeAfterHide
else dock is visible
positionChangeConnections->>dockAnimation: startAnimation(false)
end
end
deactivate positionChangeConnections
rect rgb(230,230,255)
dockAnimation-->>dockAnimation: onStopped
alt isPositionChanging true and isShowing false
dockAnimation->>dockAnimation: isPositionChanging = false
dockAnimation->>positionChangeConnections: handlePositionChangeAfterHide
else isShowing true
dockAnimation->>Panel: read hideState
alt Panel.hideState is Hide
dockAnimation->>hideTimer: start
end
end
end
rect rgb(230,255,230)
positionChangeConnections->>positionChangeConnections: handlePositionChangeAfterHide
positionChangeConnections->>positionChangeConnections: update previousPosition
positionChangeConnections->>Applet: position = savedNewPosition
positionChangeConnections->>positionChangeConnections: savedNewPosition = -1
positionChangeConnections->>Panel: changeDragAreaAnchor
positionChangeConnections->>Panel: requestClosePopup
positionChangeConnections->>dockAnimation: configure dockTransform for hidden offset
positionChangeConnections->>dockAnimation: startAnimation(true)
end
Updated class diagram for dockAnimation and positionChangeConnectionsclassDiagram
class DockAnimation {
bool useTransformBasedAnimation
bool isShowing
bool isPositionChanging
var target
string animProperty
startAnimation(show)
stop()
onStopped()
}
class PositionChangeConnections {
int previousPosition
int savedNewPosition
bool isRestoringPosition
onPositionChanged()
handlePositionChangeAfterHide()
onDockSizeChanged()
onCompleted()
}
class Dock {
bool visible
bool useColumnLayout
int width
int height
}
class DockTransform {
int x
int y
}
class Panel {
int position
int dockSize
int hideState
requestClosePopup()
changeDragAreaAnchor()
}
class Applet {
int position
}
DockAnimation --> Dock : animates
DockAnimation --> DockTransform : uses
PositionChangeConnections --> DockAnimation : controls
PositionChangeConnections --> Panel : updates
PositionChangeConnections --> Applet : restores_and_applies_position
PositionChangeConnections --> DockTransform : sets_hidden_offset
Panel --> Dock : configures_size
Flow diagram for dock position change and animation statesflowchart TD
A[User changes dock position via menu] --> B[Panel.position changes]
B --> C[onPositionChanged in positionChangeConnections]
C --> D{isRestoringPosition}
D -->|true| E[Return, ignore change]
D -->|false| F[Save savedNewPosition from Panel.position]
F --> G[Set isRestoringPosition = true]
G --> H[Restore Applet.position to previousPosition]
H --> I[Set isRestoringPosition = false]
I --> J[Stop dockAnimation and hideShowAnimation]
J --> K[Set dockAnimation.isPositionChanging = true]
K --> L{Panel.hideState is Hide and dock not visible}
L -->|true| M[Set dockAnimation.isPositionChanging = false]
M --> N[handlePositionChangeAfterHide]
L -->|false| O["startAnimation(false) for hide"]
O --> P[dockAnimation onStopped]
P --> Q{isPositionChanging and not isShowing}
Q -->|true| R[Set isPositionChanging = false]
R --> N
Q -->|false| S{isShowing and Panel.hideState is Hide}
S -->|true| T[start hideTimer]
S -->|false| U[End]
N --> V{savedNewPosition is valid}
V -->|false| U
V -->|true| W[Set previousPosition = savedNewPosition]
W --> X[Apply Applet.position = savedNewPosition]
X --> Y[Reset savedNewPosition = -1]
Y --> Z[changeDragAreaAnchor and requestClosePopup]
Z --> AA[Set dockTransform to hidden offset based on position]
AA --> AB["startAnimation(true) for show"]
AB --> AC[dockAnimation onStopped with isShowing true]
AC --> AD{Panel.hideState is Hide}
AD -->|true| T
AD -->|false| U
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Hey - I've left some high level feedback:
- The
dockAnimation.isPositionChangingflag is only reset inonStoppedand the early-return path for hidden docks; if the animation is interrupted (e.g., by another position change or a manualstop()), this flag may remain true and affect later animations—consider centralizing state reset so all code paths that stop animations clear this flag consistently. - In the
Connectionshandler foronPositionChanged, theisRestoringPositionflag is set and immediately cleared after assigningApplet.position; this relies on synchronous behavior of the signal emission—if this logic ever changes or other async work is added, it may become brittle, so consider scoping the restore logic into a helper that manages the flag with a clearer critical section.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- The `dockAnimation.isPositionChanging` flag is only reset in `onStopped` and the early-return path for hidden docks; if the animation is interrupted (e.g., by another position change or a manual `stop()`), this flag may remain true and affect later animations—consider centralizing state reset so all code paths that stop animations clear this flag consistently.
- In the `Connections` handler for `onPositionChanged`, the `isRestoringPosition` flag is set and immediately cleared after assigning `Applet.position`; this relies on synchronous behavior of the signal emission—if this logic ever changes or other async work is added, it may become brittle, so consider scoping the restore logic into a helper that manages the flag with a clearer critical section.Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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TAG Bot New tag: 2.0.27 |
Improve position switching logic with smooth transition animations: 1. Save new position and temporarily restore to old position when switching 2. Play hide animation at old position 3. Switch to new position and play show animation from hidden state 4. Use state flags to precisely control animation flow and avoid flickering This ensures the dock doesn't show blank areas, content overflow, or sudden jumps during position changes. Log: Fix display issues when switching dock position PMS: BUG-346777
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deepin pr auto review这份代码是对 Dock（任务栏）面板位置切换动画逻辑的重构，主要目的是解决切换位置时可能出现的闪烁、空白区域或动画不连贯的问题。整体来看，代码逻辑比之前更加清晰，通过引入状态标志位（ 以下是对该 1. 语法逻辑
2. 代码质量
3. 代码性能
4. 代码安全
总结与具体改进建议这份代码在逻辑和结构上是一个不错的改进。为了进一步完善，建议进行以下微调：
总体而言，这是一个稳健的修改方案，主要解决了用户体验问题，代码结构也更加合理。 |
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通过改进位置切换逻辑，实现平滑的过渡动画：
这样可以确保任务栏在位置切换时不会出现空白区域、内容溢出或突然跳变的问题。
Log: 修复任务栏位置切换时的显示异常
PMS: BUG-346777
Summary by Sourcery
Improve dock position change handling to provide smooth hide/show transitions and avoid visual glitches when moving the taskbar.
Bug Fixes:
Enhancements: