samples:samples:multiselect
Table of Contents
Multiselect sample
Documentation | Samples | Multiselect
Summary
Multiselect Sample — Demonstrates multiple feature selection with different selection modes and displaying selected feature attributes in a list and attributes panel.
Description
What the sample shows:
- Selecting features via click or drag rectangle
- Multi-feature selection with Ctrl+click for additive selection
- Spatial selection (box, polygon, or radius)
- Filtering selected features by attribute criteria
- Viewing selected feature attributes in detail grid
- Listing selected features in a listbox
- Highlighting selected features with color
- Clearing selection
- Zoom to selected features
- Counting and displaying selection statistics
- Using TGIS_ControlAttributes for attribute viewing
- Full extent zoom navigation
- Support for Ctrl key modifiers for selection modes
This sample illustrates use of:
| Name | Description |
|---|---|
| TGIS_Viewer.Items | All layers. |
| TGIS_Viewer.ScreenToMap | Converts point coordinates from screen coordinates to map coordinates. |
| TGIS_Viewer.Locate | Locates the shape nearest to _ptg that is within _prec. |
| TGIS_Shape.MakeEditable | Make the shape editable by materializing mutable shape data when necessary. |
| TGIS_Shape.IsSelected | Shape is selected in the layer. |
| TGIS_LayerVector.FindFirst | Initiates iteration by finding the first shape in the layer and prepares cursor state for subsequent FindNext calls. |
| TGIS_LayerVector.FindNext | Retrieves the next shape from the active FindFirst query cursor and continues iteration over shapes matching the original criteria. |
| TGIS_LayerVector.DeselectAll | Clears the selection state of all shapes in the layer. |
Code
This sample is available on the following platforms (click to view the source code on GitHub):
2026/08/30 05:53