1. Macos App Can I Replace White Pixels With Different Color Pages
2. Macos App Can I Replace White Pixels With Different Colors

Aug 31, 2014  I know that I photo is considered one of the specialist app of apple. Recently, I was looking in the app for a way to change the background of any picture to any color I want. As example, I have a picture with yellow color background & I want to change it to white color. The resolution to these problems can revolve round the particular apps wherein the issue make the most impactful effect. Users have reported the issue mostly attends the use of Chromium. In such instances, it appears the issue stems from compatibility issues involving the app, MacOS Mojave, and the NVIDIA graphics processing unit. Mar 01, 2018  Step 6: Use the sliders to adjust the color of the folder to your liking. If you wish to have more control over the color, you can use an app like Pixelmator or Affinity Photo. Mar 01, 2018 If you wish to have more control over the color, you can use an app like Pixelmator or Affinity Photo. Step 7: Once your changes are complete select Edit → Select All. Step 8: Select Edit → Copy. You can apply a solid color background to turn the entire photo backdrop of your design into a solid color field. To do this: Tap on the photo. Open the Colors tab to view the color menu. Choose from recently used colors in the layout and default colors. You can also use custom color from the color picker by tapping on the + button under the.

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When your app is running in a desktop window, you can customize the title bars to match the personality of your app. The title bar customization APIs let you specify colors for title bar elements, or extend your app content into the title bar area and take full control of it.

Important APIs: ApplicationView.TitleBar property, ApplicationViewTitleBar class, CoreApplicationViewTitleBar class

How much to customize the title bar

There are two levels of customization that you can apply to the title bar.

For simple color customization, you can set ApplicationViewTitleBar properties to specify the colors you want to use for title bar elements. In this case, the system retains responsibility for all other aspects of the title bar, such as drawing the app title and defining draggable areas.

Your other option is to hide the default title bar and replace it with your own XAML content. For example, you can place text, buttons, or custom menus in the title bar area. You will also need to use this option to extend an acrylic background into the title bar area.

When you opt for full customization, you are responsible for putting content in the title bar area, and you can define your own draggable region. The system Back, Close, Minimize, and Maximize buttons are still available and handled by the system, but elements like the app title are not. You will need to create those elements yourself as needed by your app.

Note

Simple color customization is available to Windows apps using XAML, DirectX, and HTML. Full customization is available only to Windows apps using XAML.

Simple color customization

If you want only to customize the title bar colors and not do anything too fancy (such as putting tabs in your title bar), you can set the color properties on the ApplicationViewTitleBar for your app window.

This example shows how to get an instance of ApplicationViewTitleBar and set its color properties.

Note

This code can be placed in your app's OnLaunched method (App.xaml.cs), after the call to Window.Activate, or in your app's first page.

Tip

The Windows Community Toolkit provides extensions that let you set these color properties in XAML. For more info, see the Windows Community Toolkit documentation.

There are a few things to be aware of when setting title bar colors:

• The button background color is not applied to the close button hover and pressed states. The close button always uses the system-defined color for those states.
• The button color properties are applied to the system back button when it's used. (See Navigation history and backwards navigation.)
• Setting a color property to null resets it to the default system color.
• You can't set transparent colors. The color's alpha channel is ignored.

Windows gives a user the option to apply their selected accent color to the title bar. If you set any title bar color, we recommend that you explicitly set all the colors. This ensures that there are no unintended color combinations that occur because of user defined color settings.

Full customization

When you opt-in to full title bar customization, your app’s client area is extended to cover the entire window, including the title bar area. You are responsible for drawing and input-handling for the entire window except the caption buttons, which are overlaid on top of the app’s canvas.

To hide the default title bar and extend your content into the title bar area, set the CoreApplicationViewTitleBar.ExtendViewIntoTitleBar property to true.

This example shows how to get the CoreApplicationViewTitleBar and set the ExtendViewIntoTitleBar property to true. This can be done in your app's OnLaunched method (App.xaml.cs), or in your app's first page.

Tip

This setting persists when your app is closed and restarted. In Visual Studio, if you set ExtendViewIntoTitleBar to true, and then want to revert to the default, you should explicitly set it to false and run your app to overwrite the persisted setting.

Draggable regions

The draggable region of the title bar defines where the user can click and drag to move the window around (as opposed to simply dragging content within the app’s canvas). You specify the draggable region by calling the Window.SetTitleBar method and passing in a UIElement that defines the draggable region. (The UIElement is often a panel that contains other elements.)

Here's how to set a Grid of content as the draggable title bar region. This code goes in the XAML and code-behind for your app's first page. See the Full customization example section for the full code.

Important

By default, some UI elements such as Grid do not participate in hit testing when they don't have a background set.For the grid AppTitleBar in the sample below to allow dragging, we therefore need to set the background to Transparent.

The UIElement (AppTitleBar) is part of the XAML for your app. You can either declare and set the title bar in a root page that doesn’t change, or declare and set a title bar region in each page that your app can navigate to. If you set it in each page, you should make sure the draggable region stays consistent as a user navigates around your app.

You can call SetTitleBar to switch to a new title bar element while your app is running. You can also pass null as the parameter to SetTitleBar to revert to the default dragging behavior. (See 'Default draggable region' for more info.)

Important

The draggable region you specify needs to be hit testable, which means, for some elements, you might need to set a transparent background brush. See the remarks on VisualTreeHelper.FindElementsInHostCoordinates for more info.

For example, if you define a Grid as your draggable region, set Background='Transparent' to make it draggable.

This Grid is not draggable (but visible elements within it are): <Grid x:Name='AppTitleBar'>.

This Grid looks the same, but the whole Grid is draggable: <Grid x:Name='AppTitleBar' Background='Transparent'>.

Default draggable region

If you don’t specify a draggable region, a rectangle that is the width of the window, the height of the caption buttons, and positioned along the top edge of the window is set as the default draggable region.

If you do define a draggable region, the system shrinks the default draggable region down to a small area the size of a caption button, positioned to the left of the caption buttons (or to the right if the captions buttons are on the left side of the window). This ensures that there is always a consistent area the user can drag.

System caption buttons

The system reserves the upper-left or upper-right corner of the app window for the system caption buttons (Back, Minimize, Maximize, Close). The system retains control of the caption control area to guarantee that minimum functionality is provided for dragging, minimizing, maximizing, and closing the window. The system draws the Close button in the upper-right for left-to-right languages and the upper-left for right-to-left languages.

The dimensions and position of the caption control area is communicated by the CoreApplicationViewTitleBar class so that you can account for it in the layout of your title bar UI. The width of the reserved region on each side is given by the SystemOverlayLeftInset or SystemOverlayRightInset properties, and its height is given by the Height property.

You can draw content underneath the caption control area defined by these properties, such as your app background, but you should not put any UI that you expect the user to be able to interact with. It does not receive any input because input for the caption controls is handled by the system.

You can handle the LayoutMetricsChanged event to respond to changes in the size of the caption buttons. For example, this can happen when the system back button is shown or hidden. Handle this event to verify and update the positioning of UI elements that depend on the title bar's size.

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This example shows how to adjust the layout of your title bar to account for changes like the system back button being shown or hidden. AppTitleBar, LeftPaddingColumn, and RightPaddingColumn are declared in the XAML shown previously.

Interactive content

You can place interactive controls, like buttons, menus, or a search box, in the top part of the app so they appear to be in the title bar. However, there are a few rules you must follow to ensure that your interactive elements receive user input.

• You must call SetTitleBar to define an area as the draggable title bar region. If you don’t, the system sets the default draggable region at the top of the page. The system will then handle all user input to this area, and prevent input from reaching your controls.
• Place your interactive controls over the top of the draggable region defined by the call to SetTitleBar (with a higher z-order). Don’t make your interactive controls children of the UIElement passed to SetTitleBar. After you pass an element to SetTitleBar, the system treats it like the system title bar and handles all pointer input to that element.

Here, the TitleBarButton element has a higher z-order than AppTitleBar, so it receives user input.

Transparency in caption buttons

When you set ExtendViewIntoTitleBar to true, you can make the background of the caption buttons transparent to let your app background show through. You typically set the background to Colors.Transparent for full transparency. For partial transparency, set the alpha channel for the Color you set the property to.

These ApplicationViewTitleBar properties can be transparent:

• ButtonBackgroundColor
• ButtonHoverBackgroundColor
• ButtonPressedBackgroundColor
• ButtonInactiveBackgroundColor

The button background color is not applied to the close button hover and pressed states. The close button always uses the system-defined color for those states.

All other color properties will continue to ignore the alpha channel. If ExtendViewIntoTitleBar is set to false, the alpha channel is always ignored for all ApplicationViewTitleBar color properties.

Full screen and tablet mode

When your app runs in full screen or tablet mode, the system hides the title bar and caption control buttons. However, the user can invoke the title bar to have it shown as an overlay on top of the app’s UI.You can handle the CoreApplicationViewTitleBar.IsVisibleChanged event to be notified when the title bar is hidden or invoked, and show or hide your custom title bar content as needed.

This example shows how to handle IsVisibleChanged to show and hide the AppTitleBar element shown previously.

Note

Full screen mode can be entered only if supported by your app. See ApplicationView.IsFullScreenMode for more info. Tablet mode is a user option on supported hardware, so a user can choose to run any app in tablet mode.

Full customization example

Do's and don'ts

• Do make it obvious when your window is active or inactive. At a minimum, change the color of the text, icons, and buttons in your title bar.
• Do define a draggable region along the top edge of the app canvas. Matching the placement of system title bars makes it easier for users to find.
• Do define a draggable region that matches the visual title bar (if any) on the app’s canvas.

Related articles

Every Mac is built with assistive technologies to support people who are blind or have low vision. The VoiceOver screen reader describes exactly what’s happening on your screen. Hover Text lets you instantly magnify a selection of text. And Display Accommodations support color blindness and other vision needs.

Hover TextGet a quick size boost of what you’re reading.

Hover Text makes it easier to view text on your display. If a paragraph, caption, or headline is too small to read, just hover over it with your cursor and press Command. You’ll get a dedicated window with a large, high-resolution version of your selection. You can even choose the fonts and colors that work best for you.

VoiceOverHear what’s happening on your screen.

VoiceOver does more than tell you what’s happening on your Mac. It helps you make things happen. It gives you auditory descriptions of each onscreen element and provides helpful hints along the way — whether you prefer using gestures, a keyboard, or a braille display. And it supports more than 35 languages, including multiple voice options.

VoiceOverIntegrated throughout macOS and every built-in app.

VoiceOver is unique because it’s not a standalone screen reader. It’s deeply integrated in macOS and all the built-in apps on Mac. And as developers update their apps to take advantage of the accessibility interfaces provided by Apple, their apps can start working with VoiceOver right away.

VoiceOverImproved PDF, web, and messages navigation.

We’ve refined VoiceOver to make it easier to navigate PDFs, websites, and messages. In Safari, improved conformance with HTML5 accessibility standards allows for more consistent navigation of websites. VoiceOver is now better at reading aloud tagged PDFs and email messages. If you start reading a website in a different language, VoiceOver can switch to the voice for that language automatically.¹ And you can add custom commands and workflows to your MacBook Pro with Touch Bar.

Audio DescriptionsHear the details in every scene.

Watch movies with detailed audio descriptions of every scene on your Mac. Movies with audio descriptions are displayed with the AD icon in the iTunes Store.

VoiceOverNavigate VoiceOver with simple gestures.

You can control VoiceOver using many of the same gestures you use with iOS. Touch the trackpad to hear a description of the item under your finger, drag to hear items continuously, and flick to move to the next item. Enable the VoiceOver Trackpad Commander, and the trackpad surface will represent the current window or document, so you can navigate quickly to any corner or edge with a tap.

VoiceOverA virtual controller with customizable commands.

VoiceOver features a virtual control called the rotor. Turning the rotor — by rotating two fingers on the trackpad as if you were turning an actual dial — lets you access an array of fully customizable commands. Use it to browse web pages more efficiently and intuitively. The rotor lists common elements like “headings,” “links,” and “images,” and lets you navigate directly to the element of your choosing.

Macos App Can I Replace White Pixels With Different Color Pages

VoiceOverPlug-and-play support for braille displays.

VoiceOver is the first screen reader to provide plug-and-play support for refreshable braille displays. Plug in or sync one of over 100 compatible displays, supporting more than 80 international tables, and the VoiceOver description is presented to you in braille. You can edit seamlessly in Grade 2 Braille, viewing your edits in the context of the actual line of text. Optimized for fast braille typists, VoiceOver makes working in braille easy and efficient. Converting between braille and text happens automatically so you see only Grade 2 Braille. And for sighted users who sit alongside you, there’s an onscreen braille panel that displays both braille and plain-text versions of the descriptions spoken by VoiceOver.

Dark ModeWorking hard gets easier on the eyes.

Dark Mode transforms the desktop and built-in apps with a dark color scheme that helps you focus on your work.² The fine points of your content take center screen as toolbars and menus recede into the background. Light text against darker backdrops in Mail, Safari Reader, Calendar, and more makes everything easier to read in low lighting conditions. And the Accessibility preferences for increased contrast and reduced transparency work with Dark Mode enabled.

DictationYou say it. Mac types it.

Dictation lets you talk where you would type — and it works in over 40 languages. So you can reply to an email, search the web, or write a report using just your voice. Navigate to any text field, activate Dictation, then say what you want to write. macOS also comes with more than 50 editing and formatting commands. So you can turn on Dictation and tell your Mac to bold a paragraph, delete a sentence, or replace a word. You can also use Automator workflows to create your own Dictation commands.

SiriStreamline the things you do every day.

Siri helps you do more with your desktop.³ Ask Siri to send messages, track down files, create reminders, search the web, and even turn on and off VoiceOver and Invert Colors, without interrupting what you’re doing on the keyboard. And because Siri is integrated with VoiceOver, you can ask it to find a file and hear the answer read out loud. If you prefer to communicate by typing, you can easily set Siri to “Type to Siri” mode.

ZoomMake your screen up to 20 times bigger.

Zoom is a powerful built-in magnifier that lets you enlarge your screen up to 20 times, so you can better see what’s on the display. You can zoom using full screen or picture-in-picture, allowing you to see the zoomed area in a separate window while keeping the rest of the screen at its native size. A shortcut key lets you pan the screen without moving the pointer while zoomed in. macOS can also flash the screen for notifications offscreen or speak text under your pointer. The hardware acceleration engine lets you boost the size of anything on your screen — text on a web page, family photos, or a place on a map.

Zoom DisplaySee content up close and at a distance simultaneously.

Now with macOS Catalina, if you have two displays, you can keep one zoomed in close while the other stays at a standard resolution. So you can tackle everyday work or give a presentation more efficiently.

Cursor SizeMagnify your cursor so it’s easier to use.

macOS lets you magnify your cursor so it’s easier to see where you are and follow along as you move around your Mac. Set the cursor size once and it stays magnified even when its shape changes. And when you swipe back and forth on your trackpad or quickly shake your mouse, the pointer grows so it’s easier to locate.

Contrast and Color OptionsInvert colors or enable color filters.

macOS lets you invert colors, enable grayscale, or choose from a range of color filters to support different forms of color blindness or other color vision deficiencies. You can select a common preset or fine-tune the color tint and hue to customize a display setting that works for you.

Reduce MotionDecrease the movement of onscreen elements.

If you’re affected by the motion of screen elements, you can turn on Reduce Motion to decrease movement in areas like Spaces, Notification Center, and the Dock.

Music, Podcasts, Books and TVNavigate and play with VoiceOver.

The Apple Music, Apple Podcasts, Apple Books, and Apple TV apps are compatible with VoiceOver, so you can navigate and play all your content even if you can’t see the screen. Browse the apps as VoiceOver reads out headers, links, and other elements on the page.

Resources

User Guides

External Resources

Explore instructional videos with tips on using vision accessibility features in macOS.

Learn more about the Hadley Institute instructional videos at their website

Macos App Can I Replace White Pixels With Different Colors

Join a community of blind and low-vision users of Apple products.

Learn more about AppleVis.com at their website

Get information on the use of Apple products by those who are blind or low vision.

Learn more about Mac-cessibility Network at their website